{"id":11306,"date":"2026-09-23T03:46:30","date_gmt":"2026-09-23T03:46:30","guid":{"rendered":"https:\/\/otus.ru\/journal\/?p=11306"},"modified":"2026-09-25T15:37:48","modified_gmt":"2026-09-25T15:37:48","slug":"scala-chto-nuzhno-znat-nachinajushhim-programmistam","status":"publish","type":"post","link":"https:\/\/otus.ru\/journal\/scala-chto-nuzhno-znat-nachinajushhim-programmistam\/","title":{"rendered":"Scala \u0434\u043b\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0449\u0438\u0445: \u0447\u0442\u043e \u043d\u0443\u0436\u043d\u043e \u0437\u043d\u0430\u0442\u044c \u043e \u044f\u0437\u044b\u043a\u0435 \u0438 \u0441 \u0447\u0435\u0433\u043e \u043d\u0430\u0447\u0430\u0442\u044c"},"content":{"rendered":"<p><strong>Scala<\/strong> &#8212; \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0442\u0438\u043f\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u044f\u0437\u044b\u043a \u043e\u0431\u0449\u0435\u0433\u043e \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u043e\u0431\u044a\u0435\u043a\u0442\u043d\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435. \u041e\u0441\u043d\u043e\u0432\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430 &#8212; JVM: \u043a\u043e\u0434 \u043d\u0430 Scala \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432 \u0431\u0430\u0439\u0442-\u043a\u043e\u0434 \u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0440\u044f\u0434\u043e\u043c \u0441 Java-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u043c\u0438. \u0415\u0441\u0442\u044c \u0438 \u0434\u0432\u0435 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0446\u0435\u043b\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 &#8212; Scala.js (JavaScript) \u0438 Scala Native (\u043c\u0430\u0448\u0438\u043d\u043d\u044b\u0439 \u043a\u043e\u0434 \u0447\u0435\u0440\u0435\u0437 LLVM).<\/p>\n<div class=\"oj-toc\" style=\"background:#f6f6f6;border-radius:8px;padding:14px 20px;margin:20px 0\">\n<p><strong>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/strong><\/p>\n<ol>\n<li><a href=\"#s1\">\u041a\u043e\u0440\u043e\u0442\u043a\u043e \u043e \u044f\u0437\u044b\u043a\u0435 \u0438 \u0435\u0433\u043e \u0438\u0441\u0442\u043e\u0440\u0438\u0438<\/a><\/li>\n<li><a href=\"#s2\">Scala 2 \u0438 Scala 3: \u043a\u0430\u043a\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e \u0443\u0447\u0438\u0442\u044c<\/a><\/li>\n<li><a href=\"#s3\">\u0427\u0435\u043c Scala \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 Java \u0438 Kotlin<\/a><\/li>\n<li><a href=\"#s4\">\u0422\u0440\u0438 \u043f\u043e\u043d\u044f\u0442\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0443\u0442\u0430\u044e\u0442 \u043d\u043e\u0432\u0438\u0447\u043a\u0438<\/a><\/li>\n<li><a href=\"#s5\">\u041f\u0435\u0440\u0432\u0430\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430: \u043e\u0442 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u0434\u043e \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430<\/a><\/li>\n<li><a href=\"#s6\">\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 \u043d\u043e\u0432\u0438\u0447\u043a\u0430<\/a><\/li>\n<li><a href=\"#s7\">\u0415\u0441\u043b\u0438 \u043d\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c<\/a><\/li>\n<li><a href=\"#s8\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f Scala \u0438 \u0447\u0442\u043e \u0443\u0447\u0438\u0442\u044c \u0434\u0430\u043b\u044c\u0448\u0435<\/a><\/li>\n<li><a href=\"#s9\">\u0412\u044b\u0432\u043e\u0434\u044b<\/a><\/li>\n<li><a href=\"#s10\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \/ \u0441\u0432\u044f\u0437\u044c \u0441 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u043e\u0439<\/a><\/li>\n<li><a href=\"#s11\">FAQ<\/a><\/li>\n<\/ol>\n<\/div>\n<p>\u041d\u0438\u0436\u0435 &#8212; \u0447\u0442\u043e \u0432\u0430\u0436\u043d\u043e \u043f\u043e\u043d\u044f\u0442\u044c \u0434\u043e \u043d\u0430\u0447\u0430\u043b\u0430 \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u044f: \u043a\u0430\u043a\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u0430, \u0447\u0435\u043c Scala \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 Java \u0438 Kotlin, \u043a\u0430\u043a \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u043f\u0435\u0440\u0432\u0430\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430, \u043d\u0430 \u043a\u0430\u043a\u0438\u0445 \u043e\u0448\u0438\u0431\u043a\u0430\u0445 \u0441\u043f\u043e\u0442\u044b\u043a\u0430\u044e\u0442\u0441\u044f \u043d\u043e\u0432\u0438\u0447\u043a\u0438 \u0438 \u0433\u0434\u0435 \u044f\u0437\u044b\u043a \u0440\u0435\u0430\u043b\u044c\u043d\u043e \u0432\u043e\u0441\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d.<\/p>\n<h2 id=\"s1\">\u041a\u043e\u0440\u043e\u0442\u043a\u043e \u043e \u044f\u0437\u044b\u043a\u0435 \u0438 \u0435\u0433\u043e \u0438\u0441\u0442\u043e\u0440\u0438\u0438<\/h2>\n<p>Scala \u0441\u043e\u0437\u0434\u0430\u043b \u041c\u0430\u0440\u0442\u0438\u043d \u041e\u0434\u0435\u0440\u0441\u043a\u0438 \u0432 \u0448\u0432\u0435\u0439\u0446\u0430\u0440\u0441\u043a\u043e\u0439 \u043b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u0438\u0438 EPFL. \u0420\u0430\u0431\u043e\u0442\u0430 \u043d\u0430\u0434 \u044f\u0437\u044b\u043a\u043e\u043c \u043d\u0430\u0447\u0430\u043b\u0430\u0441\u044c \u0432 2001 \u0433\u043e\u0434\u0443, \u043f\u0435\u0440\u0432\u044b\u0439 \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 \u0434\u043b\u044f JVM \u0432\u044b\u0448\u0435\u043b \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 2004 \u0433\u043e\u0434\u0430. \u0411\u044b\u043b\u0430 \u0438 \u0432\u0435\u0440\u0441\u0438\u044f \u0434\u043b\u044f .NET, \u043d\u043e \u0435\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0434\u0430\u0432\u043d\u043e \u043f\u0440\u0435\u043a\u0440\u0430\u0442\u0438\u043b\u0438, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u0433\u043e\u0432\u043e\u0440\u0438\u0442\u044c \u043e Scala \u043d\u0430 .NET \u043d\u0435 \u0441\u0442\u043e\u0438\u0442.<\/p>\n<p>\u041a\u043b\u044e\u0447\u0435\u0432\u0430\u044f \u0438\u0434\u0435\u044f \u044f\u0437\u044b\u043a\u0430 &#8212; \u00ab\u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u043c\u043e\u0441\u0442\u044c\u00bb (\u043e\u0442\u0441\u044e\u0434\u0430 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435: Scalable Language). \u041e\u0434\u043d\u0438 \u0438 \u0442\u0435 \u0436\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b &#8212; \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u043a\u043b\u0430\u0441\u0441\u044b, \u0442\u0440\u0435\u0439\u0442\u044b, \u0441\u043e\u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0441 \u043e\u0431\u0440\u0430\u0437\u0446\u043e\u043c &#8212; \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0438 \u0432 \u0441\u043a\u0440\u0438\u043f\u0442\u0435 \u043d\u0430 \u0434\u0435\u0441\u044f\u0442\u044c \u0441\u0442\u0440\u043e\u043a, \u0438 \u0432 \u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u042d\u0442\u043e \u043d\u0435 \u0437\u043d\u0430\u0447\u0438\u0442, \u0447\u0442\u043e \u043f\u0440\u043e\u0435\u043a\u0442 \u043d\u0430 Scala \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u00ab\u0441\u0430\u043c\u00bb: \u0440\u0435\u0447\u044c \u043e \u0432\u044b\u0440\u0430\u0437\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u044f\u0437\u044b\u043a\u0430, \u0430 \u043d\u0435 \u043e\u0431 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0435.<\/p>\n<h2 id=\"s2\">Scala 2 \u0438 Scala 3: \u043a\u0430\u043a\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e \u0443\u0447\u0438\u0442\u044c<\/h2>\n<p>\u0412 2021 \u0433\u043e\u0434\u0443 \u0432\u044b\u0448\u043b\u0430 Scala 3 &#8212; \u043a\u0440\u0443\u043f\u043d\u0430\u044f \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u044f\u0437\u044b\u043a\u0430 (\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 Dotty). \u041d\u0430 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044c 2026 \u0433\u043e\u0434\u0430 \u043d\u043e\u0432\u0438\u0447\u043a\u0443 \u0441\u0442\u043e\u0438\u0442 \u043d\u0430\u0447\u0438\u043d\u0430\u0442\u044c \u0441\u043e Scala 3. Scala 2 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u0430\u044f \u0432\u0435\u0442\u043a\u0430 2.13, \u0438 \u0435\u0435 \u0432\u0441\u0435 \u0435\u0449\u0435 \u043c\u043d\u043e\u0433\u043e \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u0430\u0445.<\/p>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>Scala 2.13<\/th>\n<th>Scala 3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0421\u0442\u0430\u0442\u0443\u0441<\/td>\n<td>\u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u0430\u044f legacy-\u0432\u0435\u0442\u043a\u0430<\/td>\n<td>\u043e\u0441\u043d\u043e\u0432\u043d\u0430\u044f \u043b\u0438\u043d\u0438\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u044f<\/td>\n<\/tr>\n<tr>\n<td>\u0421\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u0431\u043b\u043e\u043a\u043e\u0432<\/td>\n<td>\u0442\u043e\u043b\u044c\u043a\u043e \u0444\u0438\u0433\u0443\u0440\u043d\u044b\u0435 \u0441\u043a\u043e\u0431\u043a\u0438<\/td>\n<td>\u0441\u043a\u043e\u0431\u043a\u0438 \u0438\u043b\u0438 \u043e\u0442\u0441\u0442\u0443\u043f\u044b (optional braces)<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u043e\u0447\u043a\u0430 \u0432\u0445\u043e\u0434\u0430<\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">object Main { def main(args: Array[String]) ... }<\/code><\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">@main def run() = ...<\/code> (\u0441\u0442\u0430\u0440\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0442\u043e\u0436\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442)<\/td>\n<\/tr>\n<tr>\n<td>\u041d\u0435\u044f\u0432\u043d\u044b\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b<\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">implicit<\/code><\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">given<\/code> \/ <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">using<\/code> (implicit \u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0434\u043b\u044f \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u0438)<\/td>\n<\/tr>\n<tr>\n<td>\u041f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f<\/td>\n<td>\u0447\u0435\u0440\u0435\u0437 sealed trait + \u043e\u0431\u044a\u0435\u043a\u0442\u044b<\/td>\n<td>\u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0435 \u0441\u043b\u043e\u0432\u043e <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">enum<\/code><\/td>\n<\/tr>\n<tr>\n<td>\u0413\u0434\u0435 \u0432\u0441\u0442\u0440\u0435\u0447\u0430\u0435\u0442\u0441\u044f<\/td>\n<td>Apache Spark, \u0441\u0442\u0430\u0440\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u044b<\/td>\n<td>\u043d\u043e\u0432\u044b\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u044b, \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u044d\u043a\u043e\u0441\u0438\u0441\u0442\u0435\u043c\u044b Typelevel \u0438 ZIO<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u041f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0432\u044b\u0432\u043e\u0434: \u0443\u0447\u0438\u0442\u0435 Scala 3, \u043d\u043e \u0431\u0443\u0434\u044c\u0442\u0435 \u0433\u043e\u0442\u043e\u0432\u044b \u0447\u0438\u0442\u0430\u0442\u044c \u043a\u043e\u0434 2.13. \u0415\u0441\u043b\u0438 \u0446\u0435\u043b\u044c &#8212; \u0440\u0430\u0431\u043e\u0442\u0430 \u0441 Apache Spark, \u0441\u0432\u0435\u0440\u044f\u0439\u0442\u0435\u0441\u044c \u0441 \u0432\u0435\u0440\u0441\u0438\u0435\u0439 Scala, \u043f\u043e\u0434 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0441\u043e\u0431\u0440\u0430\u043d \u0432\u0430\u0448 Spark: \u043e\u043d \u0438\u0441\u0442\u043e\u0440\u0438\u0447\u0435\u0441\u043a\u0438 \u0436\u0438\u0432\u0435\u0442 \u043d\u0430 \u0432\u0435\u0442\u043a\u0435 2.x.<\/p>\n<h2 id=\"s3\">\u0427\u0435\u043c Scala \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 Java \u0438 Kotlin<\/h2>\n<p>\u0412\u0441\u0435 \u0442\u0440\u0438 \u044f\u0437\u044b\u043a\u0430 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u043d\u0430 JVM \u0438 \u043c\u043e\u0433\u0443\u0442 \u0432\u044b\u0437\u044b\u0432\u0430\u0442\u044c \u043a\u043e\u0434 \u0434\u0440\u0443\u0433 \u0434\u0440\u0443\u0433\u0430. \u0420\u0430\u0437\u043d\u0438\u0446\u0430 &#8212; \u0432 \u0442\u043e\u043c, \u043a\u0430\u043a\u043e\u0439 \u0441\u0442\u0438\u043b\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u044f\u0437\u044b\u043a \u043f\u043e\u043e\u0449\u0440\u044f\u0435\u0442.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u041a\u0440\u0438\u0442\u0435\u0440\u0438\u0439<\/th>\n<th>Java<\/th>\n<th>Kotlin<\/th>\n<th>Scala<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0442\u0438\u043b\u044c<\/td>\n<td>\u041e\u041e\u041f, \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b \u0441 Java 8<\/td>\n<td>\u041e\u041e\u041f + \u043f\u0440\u0430\u0433\u043c\u0430\u0442\u0438\u0447\u043d\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u0449\u0438\u043d\u0430<\/td>\n<td>\u041e\u041e\u041f \u0438 \u0424\u041f \u043d\u0430 \u0440\u0430\u0432\u043d\u044b\u0445<\/td>\n<\/tr>\n<tr>\n<td>\u0412\u044b\u0432\u043e\u0434 \u0442\u0438\u043f\u043e\u0432<\/td>\n<td>\u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0439 (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">var<\/code> \u0441 Java 10)<\/td>\n<td>\u0440\u0430\u0437\u0432\u0438\u0442\u044b\u0439<\/td>\n<td>\u0440\u0430\u0437\u0432\u0438\u0442\u044b\u0439<\/td>\n<\/tr>\n<tr>\n<td>\u0421\u043e\u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0441 \u043e\u0431\u0440\u0430\u0437\u0446\u043e\u043c<\/td>\n<td>\u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0441 Java 16-21<\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">when<\/code><\/td>\n<td><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">match<\/code> &#8212; \u043e\u0434\u043d\u0430 \u0438\u0437 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u044c\u043d\u044b\u0445 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439<\/td>\n<\/tr>\n<tr>\n<td>\u041f\u043e\u0440\u043e\u0433 \u0432\u0445\u043e\u0434\u0430<\/td>\n<td>\u043d\u0438\u0436\u0435<\/td>\n<td>\u043d\u0438\u0436\u0435<\/td>\n<td>\u0432\u044b\u0448\u0435 \u0438\u0437-\u0437\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0438\u043f\u043e\u0432 \u0438 \u0424\u041f-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043d\u0438\u0448\u0438<\/td>\n<td>\u043a\u043e\u0440\u043f\u043e\u0440\u0430\u0442\u0438\u0432\u043d\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434<\/td>\n<td>Android, \u0431\u044d\u043a\u0435\u043d\u0434<\/td>\n<td>\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0434\u0430\u043d\u043d\u044b\u0445, \u0432\u044b\u0441\u043e\u043a\u043e\u043d\u0430\u0433\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434, \u0444\u0438\u043d\u0442\u0435\u0445<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0421\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441 Java \u043d\u0443\u0436\u043d\u043e \u043f\u043e\u043d\u0438\u043c\u0430\u0442\u044c \u0442\u043e\u0447\u043d\u043e. Scala \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 Java-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438, \u0430 Java \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u0437\u044b\u0432\u0430\u0442\u044c Scala-\u043a\u043e\u0434. \u041d\u043e \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 Scala (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">given<\/code>, \u0442\u0438\u043f\u044b \u0432\u044b\u0441\u0448\u0438\u0445 \u043f\u043e\u0440\u044f\u0434\u043a\u043e\u0432, \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432 \u0441\u043b\u043e\u0436\u043d\u044b\u0445 \u0441\u0438\u0433\u043d\u0430\u0442\u0443\u0440\u0430\u0445) \u0438\u0437 Java \u0432\u044b\u0437\u044b\u0432\u0430\u0442\u044c \u043d\u0435\u0443\u0434\u043e\u0431\u043d\u043e \u0438\u043b\u0438 \u043d\u0435\u043b\u044c\u0437\u044f \u043d\u0430\u043f\u0440\u044f\u043c\u0443\u044e. Scala &#8212; \u043d\u0435 \u00ab\u043d\u0430\u0434\u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e Java\u00bb: Java-\u043a\u043e\u0434 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u043e\u043c Scala \u043d\u0435 \u0441\u043e\u0431\u0438\u0440\u0430\u0435\u0442\u0441\u044f.<\/p>\n<h2 id=\"s4\">\u0422\u0440\u0438 \u043f\u043e\u043d\u044f\u0442\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0443\u0442\u0430\u044e\u0442 \u043d\u043e\u0432\u0438\u0447\u043a\u0438<\/h2>\n<ul>\n<li><strong><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val<\/code><\/strong> &#8212; \u043d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u0430\u044f \u0441\u0441\u044b\u043b\u043a\u0430: \u043f\u0440\u0438\u0441\u0432\u043e\u0438\u0442\u044c \u043d\u043e\u0432\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0435\u043b\u044c\u0437\u044f. \u042d\u0442\u043e \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e.<\/li>\n<li><strong><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">var<\/code><\/strong> &#8212; \u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u0430\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f. \u041d\u0443\u0436\u043d\u0430 \u0440\u0435\u0434\u043a\u043e: \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u0432 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0445 \u0446\u0438\u043a\u043b\u0430\u0445 \u0438 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f\u0445.<\/li>\n<li><strong><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">def<\/code><\/strong> &#8212; \u043c\u0435\u0442\u043e\u0434: \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u043a\u0430\u0436\u0434\u043e\u043c \u0432\u044b\u0437\u043e\u0432\u0435, \u0430 \u043d\u0435 \u043e\u0434\u0438\u043d \u0440\u0430\u0437.<\/li>\n<\/ul>\n<p>\u0423\u043f\u0440\u043e\u0449\u0435\u043d\u0438\u0435: <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val<\/code> \u0437\u0430\u043f\u0440\u0435\u0449\u0430\u0435\u0442 \u043f\u0435\u0440\u0435\u043f\u0440\u0438\u0441\u0432\u0430\u0438\u0432\u0430\u043d\u0438\u0435, \u043d\u043e \u043d\u0435 \u0434\u0435\u043b\u0430\u0435\u0442 \u043e\u0431\u044a\u0435\u043a\u0442 \u0432\u043d\u0443\u0442\u0440\u0438 \u043d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u043c. <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val buf = scala.collection.mutable.ListBuffer(1)<\/code> \u043c\u043e\u0436\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0447\u0435\u0440\u0435\u0437 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">buf += 2<\/code>. \u041d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0441\u0442\u044c \u0434\u0430\u044e\u0442 \u043d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438 (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">List<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Map<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Vector<\/code> \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e) \u0438 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">case class<\/code>.<\/p>\n<p>\u0415\u0449\u0435 \u043e\u0434\u043d\u0430 \u043f\u0430\u0440\u0430: \u0442\u0438\u043f\u0438\u0437\u0430\u0446\u0438\u044f \u0432 Scala \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f (\u0442\u0438\u043f\u044b \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u0442 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440) \u0438 \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u0441 \u0432\u044b\u0432\u043e\u0434\u043e\u043c \u0442\u0438\u043f\u043e\u0432 &#8212; \u043f\u0438\u0441\u0430\u0442\u044c \u0442\u0438\u043f \u044f\u0432\u043d\u043e \u043d\u0443\u0436\u043d\u043e \u043d\u0435 \u0432\u0435\u0437\u0434\u0435. \u0412 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val n = 5<\/code> \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u0441\u0430\u043c \u0432\u044b\u0432\u0435\u0434\u0435\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Int<\/code>, \u043d\u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0442\u044c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">n<\/code> \u0442\u0443\u0434\u0430, \u0433\u0434\u0435 \u0436\u0434\u0443\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">String<\/code>, \u043d\u0435 \u0434\u0430\u0441\u0442. \u0422\u043e\u0447\u043a\u0430 \u0441 \u0437\u0430\u043f\u044f\u0442\u043e\u0439 \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0442\u0440\u043e\u043a\u0438 \u043d\u0435\u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u0430.<\/p>\n<h2 id=\"s5\">\u041f\u0435\u0440\u0432\u0430\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430: \u043e\u0442 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u0434\u043e \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430<\/h2>\n<p>\u0414\u043b\u044f Scala 3 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c JDK (\u043f\u043e\u0434\u043e\u0439\u0434\u0435\u0442 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u0430\u044f LTS, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 21 \u0438\u043b\u0438 25) \u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala<\/code>. \u041d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 Scala 3.5 \u043a\u043e\u043c\u0430\u043d\u0434\u0430 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala<\/code> &#8212; \u044d\u0442\u043e Scala CLI: \u043e\u043d\u0430 \u0441\u0430\u043c\u0430 \u0441\u043a\u0430\u0447\u0430\u0435\u0442 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u0438 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442 \u0444\u0430\u0439\u043b \u0431\u0435\u0437 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430. \u0423\u0434\u043e\u0431\u043d\u0435\u0435 \u0432\u0441\u0435\u0433\u043e \u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0447\u0435\u0440\u0435\u0437 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0449\u0438\u043a Coursier (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">cs setup<\/code>).<\/p>\n<p>\u041c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u043f\u043e\u043b\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 &#8212; \u043e\u0442\u0447\u0435\u0442 \u043f\u043e \u043e\u043f\u043b\u0430\u0447\u0435\u043d\u043d\u044b\u043c \u0437\u0430\u043a\u0430\u0437\u0430\u043c. \u0421\u043e\u0445\u0440\u0430\u043d\u0438\u0442\u0435 \u043a\u0430\u043a <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Main.scala<\/code>:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">case<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #C678DD\">class<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">Order<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">id<\/span><span style=\"color: #ABB2BF\">: <\/span><span style=\"color: #E5C07B\">Int<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E06C75\">customer<\/span><span style=\"color: #ABB2BF\">: <\/span><span style=\"color: #E5C07B\">String<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E06C75\">amount<\/span><span style=\"color: #ABB2BF\">: <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\">: <\/span><span style=\"color: #E5C07B\">Boolean<\/span><span style=\"color: #ABB2BF\">)<\/span>\n\n<span style=\"color: #61AFEF\">@main<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #C678DD\">def<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #61AFEF; font-weight: bold\">report<\/span><span style=\"color: #ABB2BF\">(): <\/span><span style=\"color: #E5C07B\">Unit<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span>\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">orders<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">List<\/span><span style=\"color: #ABB2BF\">(<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E5C07B\">Order<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">1<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"anna\"<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"1200.50\"<\/span><span style=\"color: #ABB2BF\">), <\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">true<\/span><span style=\"color: #ABB2BF\">),<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E5C07B\">Order<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">2<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"boris\"<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"300.00\"<\/span><span style=\"color: #ABB2BF\">), <\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">false<\/span><span style=\"color: #ABB2BF\">),<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E5C07B\">Order<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">3<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"anna\"<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"450.00\"<\/span><span style=\"color: #ABB2BF\">), <\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">true<\/span><span style=\"color: #ABB2BF\">),<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E5C07B\">Order<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #D19A66\">4<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"vera\"<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"990.90\"<\/span><span style=\"color: #ABB2BF\">), <\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">true<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">  )<\/span>\n\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">paidByCustomer<\/span><span style=\"color: #ABB2BF\">: <\/span><span style=\"color: #E5C07B\">Map<\/span><span style=\"color: #ABB2BF\">[<\/span><span style=\"color: #E5C07B\">String<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E5C07B\">BigDecimal<\/span><span style=\"color: #ABB2BF\">] <\/span><span style=\"color: #56B6C2\">=<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E06C75\">orders<\/span>\n<span style=\"color: #ABB2BF\">      .<\/span><span style=\"color: #E06C75\">filter<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">_<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">      .<\/span><span style=\"color: #E06C75\">groupBy<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">_<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">customer<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">      .<\/span><span style=\"color: #E06C75\">view<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">mapValues<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">_<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">map<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">_<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">amount<\/span><span style=\"color: #ABB2BF\">).<\/span><span style=\"color: #E06C75\">sum<\/span><span style=\"color: #ABB2BF\">).<\/span><span style=\"color: #E06C75\">toMap<\/span>\n\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #E06C75\">paidByCustomer<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">toList<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">sortBy<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">_<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">_1<\/span><span style=\"color: #ABB2BF\">).<\/span><span style=\"color: #E06C75\">foreach<\/span><span style=\"color: #ABB2BF\"> { (<\/span><span style=\"color: #E06C75\">name<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #E06C75\">total<\/span><span style=\"color: #ABB2BF\">) <\/span><span style=\"color: #56B6C2\">=&gt;<\/span>\n<span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">s\"$<\/span><span style=\"color: #E06C75\">name<\/span><span style=\"color: #98C379\">: $<\/span><span style=\"color: #E06C75\">total<\/span><span style=\"color: #98C379\">\"<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">  }<\/span>\n\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">unpaid<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">orders<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">count<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">o<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">!<\/span><span style=\"color: #E06C75\">o<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">paid<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">s\"\u041d\u0435\u043e\u043f\u043b\u0430\u0447\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u043a\u0430\u0437\u043e\u0432: $<\/span><span style=\"color: #E06C75\">unpaid<\/span><span style=\"color: #98C379\">\"<\/span><span style=\"color: #ABB2BF\">)<\/span><\/code><\/pre>\n<p>\u0417\u0430\u043f\u0443\u0441\u043a:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">scala<span style=\"color: #ABB2BF\"> <\/span>run<span style=\"color: #ABB2BF\"> <\/span>Main.scala<\/code><\/pre>\n<p>\u0412 \u043a\u043e\u043d\u0441\u043e\u043b\u0438 \u043f\u043e\u044f\u0432\u0438\u0442\u0441\u044f (\u043f\u043e\u0441\u043b\u0435 \u0441\u0442\u0440\u043e\u043a \u043e \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u043f\u0440\u0438 \u043f\u0435\u0440\u0432\u043e\u043c \u0437\u0430\u043f\u0443\u0441\u043a\u0435):<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">anna: 1650.50\nvera: 990.90\n\u041d\u0435\u043e\u043f\u043b\u0430\u0447\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u043a\u0430\u0437\u043e\u0432: 1\n<\/code><\/pre>\n<p>\u0420\u0430\u0437\u0431\u043e\u0440 \u043f\u043e \u0441\u0442\u0440\u043e\u043a\u0430\u043c:<\/p>\n<ol>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">case class Order(...)<\/code> &#8212; \u043a\u043b\u0430\u0441\u0441-\u0437\u0430\u043f\u0438\u0441\u044c: \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u0441\u0430\u043c \u0441\u043e\u0437\u0434\u0430\u0435\u0442 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0442\u043e\u0440 \u0431\u0435\u0437 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">new<\/code>, \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u043f\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044e, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">toString<\/code> \u0438 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0447\u0435\u0440\u0435\u0437 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">copy<\/code>.<\/li>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">@main def report()<\/code> &#8212; \u0442\u043e\u0447\u043a\u0430 \u0432\u0445\u043e\u0434\u0430 \u0432 \u0441\u0442\u0438\u043b\u0435 Scala 3. \u0422\u0435\u043b\u043e \u0437\u0430\u0434\u0430\u043d\u043e \u043e\u0442\u0441\u0442\u0443\u043f\u0430\u043c\u0438, \u0431\u0435\u0437 \u0444\u0438\u0433\u0443\u0440\u043d\u044b\u0445 \u0441\u043a\u043e\u0431\u043e\u043a.<\/li>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">filter(_.paid)<\/code> &#8212; \u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c \u043e\u043f\u043b\u0430\u0447\u0435\u043d\u043d\u044b\u0435 \u0437\u0430\u043a\u0430\u0437\u044b. <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">_<\/code> &#8212; \u043a\u0440\u0430\u0442\u043a\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 \u043b\u044f\u043c\u0431\u0434\u044b.<\/li>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">groupBy(_.customer)<\/code> &#8212; \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Map[String, List[Order]]<\/code>.<\/li>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">mapValues(_.map(_.amount).sum)<\/code> &#8212; \u0434\u043b\u044f \u043a\u0430\u0436\u0434\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0441\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0435\u043c \u0441\u0443\u043c\u043c\u044b. <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">BigDecimal<\/code> \u0432\u0437\u044f\u0442 \u0432\u043c\u0435\u0441\u0442\u043e <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Double<\/code>, \u0447\u0442\u043e\u0431\u044b 1200.50 + 450.00 \u0434\u0430\u043b\u043e \u0440\u043e\u0432\u043d\u043e 1650.50 \u0431\u0435\u0437 \u0434\u0432\u043e\u0438\u0447\u043d\u043e\u0433\u043e \u043e\u043a\u0440\u0443\u0433\u043b\u0435\u043d\u0438\u044f.<\/li>\n<li><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">sortBy(_._1)<\/code> &#8212; \u0441\u043e\u0440\u0442\u0438\u0440\u0443\u0435\u043c \u043f\u043e \u0438\u043c\u0435\u043d\u0438, \u0438\u043d\u0430\u0447\u0435 \u043f\u043e\u0440\u044f\u0434\u043e\u043a \u043a\u043b\u044e\u0447\u0435\u0439 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Map<\/code> \u043d\u0435 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d.<\/li>\n<\/ol>\n<p>\u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0439 \u0441\u043f\u0438\u0441\u043e\u043a <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">orders<\/code> \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u043d\u0435 \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f: \u043a\u0430\u0436\u0434\u0430\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043d\u043e\u0432\u0443\u044e \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u044e. \u042d\u0442\u043e \u0438 \u0435\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0441\u0442\u0438\u043b\u044c \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435.<\/p>\n<h2 id=\"s6\">\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 \u043d\u043e\u0432\u0438\u0447\u043a\u0430<\/h2>\n<p><strong>\u041e\u0448\u0438\u0431\u043a\u0430 1. \u041f\u0435\u0440\u0435\u043f\u0440\u0438\u0441\u0432\u0430\u0438\u0432\u0430\u043d\u0438\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val<\/code>.<\/strong><\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">total<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">10<\/span>\n<span style=\"color: #E06C75\">total<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">20<\/span><\/code><\/pre>\n<p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 &#8212; \u043e\u0448\u0438\u0431\u043a\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438, \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430 \u043d\u0435 \u0441\u043e\u0431\u0435\u0440\u0435\u0442\u0441\u044f:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">Reassignment to val total\n<\/code><\/pre>\n<p>\u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435: \u0435\u0441\u043b\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f &#8212; <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">var total = 10<\/code>. \u041d\u043e \u0447\u0430\u0449\u0435 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0435\u0435 \u0437\u0430\u0432\u0435\u0441\u0442\u0438 \u043d\u043e\u0432\u043e\u0435 \u0438\u043c\u044f (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val newTotal = total + 10<\/code>) \u0438 \u043d\u0435 \u043c\u0435\u043d\u044f\u0442\u044c \u0441\u0442\u0430\u0440\u043e\u0435.<\/p>\n<p><strong>\u041e\u0448\u0438\u0431\u043a\u0430 2. \u041e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u043a\u043b\u044e\u0447\u0443 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Map<\/code>.<\/strong><\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">prices<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">Map<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"tea\"<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">-&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">100<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"coffee\"<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">-&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">150<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">prices<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"juice\"<\/span><span style=\"color: #ABB2BF\">))<\/span><\/code><\/pre>\n<p>\u041a\u043e\u0434 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f, \u043d\u043e \u043f\u0440\u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0435 \u043f\u0430\u0434\u0430\u0435\u0442:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">java.util.NoSuchElementException: key not found: juice\n<\/code><\/pre>\n<p>\u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 &#8212; \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Option<\/code> \u0438 \u044f\u0432\u043d\u043e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\"><span style=\"color: #C678DD\">val<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">prices<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">=<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">Map<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"tea\"<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">-&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">100<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #98C379\">\"coffee\"<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #56B6C2\">-&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #D19A66\">150<\/span><span style=\"color: #ABB2BF\">)<\/span>\n\n<span style=\"color: #E06C75\">prices<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">get<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"juice\"<\/span><span style=\"color: #ABB2BF\">) <\/span><span style=\"color: #C678DD\">match<\/span>\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #C678DD\">case<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">Some<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">p<\/span><span style=\"color: #ABB2BF\">) <\/span><span style=\"color: #56B6C2\">=&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">s\"\u0426\u0435\u043d\u0430: $<\/span><span style=\"color: #E06C75\">p<\/span><span style=\"color: #98C379\">\"<\/span><span style=\"color: #ABB2BF\">)<\/span>\n<span style=\"color: #ABB2BF\">  <\/span><span style=\"color: #C678DD\">case<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E5C07B\">None<\/span><span style=\"color: #ABB2BF\">    <\/span><span style=\"color: #56B6C2\">=&gt;<\/span><span style=\"color: #ABB2BF\"> <\/span><span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"\u0422\u0430\u043a\u043e\u0433\u043e \u0442\u043e\u0432\u0430\u0440\u0430 \u043d\u0435\u0442\"<\/span><span style=\"color: #ABB2BF\">)<\/span>\n\n<span style=\"color: #E06C75\">println<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #E06C75\">prices<\/span><span style=\"color: #ABB2BF\">.<\/span><span style=\"color: #E06C75\">getOrElse<\/span><span style=\"color: #ABB2BF\">(<\/span><span style=\"color: #98C379\">\"tea\"<\/span><span style=\"color: #ABB2BF\">, <\/span><span style=\"color: #D19A66\">0<\/span><span style=\"color: #ABB2BF\">))<\/span><\/code><\/pre>\n<p>\u0412\u044b\u0432\u043e\u0434:<\/p>\n<pre style=\"background:#282c34;color:#abb2bf;border-radius:8px;padding:16px 20px;margin:20px 0;overflow-x:auto;font-size:14px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\"><code style=\"background:none\">\u0422\u0430\u043a\u043e\u0433\u043e \u0442\u043e\u0432\u0430\u0440\u0430 \u043d\u0435\u0442\n100\n<\/code><\/pre>\n<p><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Option<\/code> &#8212; \u0431\u0430\u0437\u043e\u0432\u0430\u044f \u0438\u0434\u0435\u044f Scala: \u0432\u043c\u0435\u0441\u0442\u043e <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">null<\/code> \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043b\u0438\u0431\u043e \u0435\u0441\u0442\u044c (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Some<\/code>), \u043b\u0438\u0431\u043e \u0435\u0433\u043e \u043d\u0435\u0442 (<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">None<\/code>), \u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u043f\u043e\u0434\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u0435\u0442 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043e\u0431\u0430 \u0441\u043b\u0443\u0447\u0430\u044f.<\/p>\n<p>\u0422\u043e\u0447\u043d\u044b\u0439 \u0442\u0435\u043a\u0441\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u0430 \u043c\u043e\u0436\u0435\u0442 \u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u043c\u0435\u0436\u0434\u0443 \u0432\u0435\u0440\u0441\u0438\u044f\u043c\u0438 Scala 3; \u0441\u0443\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0438 \u043e\u0442 \u044d\u0442\u043e\u0433\u043e \u043d\u0435 \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f.<\/p>\n<h2 id=\"s7\">\u0415\u0441\u043b\u0438 \u043d\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c<\/h2>\n<ul>\n<li><strong><code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala: command not found<\/code><\/strong> &#8212; \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d \u0438\u043b\u0438 \u043d\u0435 \u0432 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">PATH<\/code>. \u041f\u0435\u0440\u0435\u043e\u0442\u043a\u0440\u043e\u0439\u0442\u0435 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b \u043f\u043e\u0441\u043b\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">cs setup<\/code>, \u043f\u0440\u043e\u0432\u0435\u0440\u044c\u0442\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala version<\/code>.<\/li>\n<li><strong>\u041e\u0448\u0438\u0431\u043a\u0438 \u043f\u0440\u043e JDK \u0438\u043b\u0438 \u0432\u0435\u0440\u0441\u0438\u044e \u043a\u043b\u0430\u0441\u0441\u0430<\/strong> &#8212; \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d JDK \u0438\u043b\u0438 \u043e\u043d \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u0441\u0442\u0430\u0440\u044b\u0439. \u041f\u0440\u043e\u0432\u0435\u0440\u044c\u0442\u0435 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">java -version<\/code>.<\/li>\n<li><strong>\u041a\u043e\u0434 \u0438\u0437 \u0441\u0442\u0430\u0442\u044c\u0438 2019 \u0433\u043e\u0434\u0430 \u043d\u0435 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f<\/strong> &#8212; \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e, \u043e\u043d \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043f\u043e\u0434 Scala 2 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u043d\u044b\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">def f() { ... }<\/code>). \u0421\u0432\u0435\u0440\u044c\u0442\u0435 \u0432\u0435\u0440\u0441\u0438\u044e \u0432 \u043f\u0440\u0438\u043c\u0435\u0440\u0435.<\/li>\n<li><strong>\u041e\u0448\u0438\u0431\u043a\u0430 \u0438\u0437-\u0437\u0430 \u043e\u0442\u0441\u0442\u0443\u043f\u043e\u0432<\/strong> \u0432 Scala 3 &#8212; \u0441\u043c\u0435\u0448\u0430\u043d\u044b \u0442\u0430\u0431\u044b \u0438 \u043f\u0440\u043e\u0431\u0435\u043b\u044b \u0438\u043b\u0438 \u0441\u0442\u0440\u043e\u043a\u0430 \u0442\u0435\u043b\u0430 \u0441\u0434\u0432\u0438\u043d\u0443\u0442\u0430 \u043d\u0435 \u043d\u0430 \u0442\u043e\u0442 \u0443\u0440\u043e\u0432\u0435\u043d\u044c. \u0412\u044b\u0440\u043e\u0432\u043d\u044f\u0439\u0442\u0435 \u043e\u0442\u0441\u0442\u0443\u043f\u044b \u0438\u043b\u0438 \u043e\u0431\u0435\u0440\u043d\u0438\u0442\u0435 \u0431\u043b\u043e\u043a \u0432 \u0444\u0438\u0433\u0443\u0440\u043d\u044b\u0435 \u0441\u043a\u043e\u0431\u043a\u0438.<\/li>\n<\/ul>\n<h2 id=\"s8\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f Scala \u0438 \u0447\u0442\u043e \u0443\u0447\u0438\u0442\u044c \u0434\u0430\u043b\u044c\u0448\u0435<\/h2>\n<p>Scala &#8212; \u044f\u0437\u044b\u043a \u043e\u0431\u0449\u0435\u0433\u043e \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u043d\u043e \u043d\u0430 \u0440\u044b\u043d\u043a\u0435 \u0443 \u043d\u0435\u0433\u043e \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u044b\u0445 \u043d\u0438\u0448:<\/p>\n<ul>\n<li><strong>\u041e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0434\u0430\u043d\u043d\u044b\u0445.<\/strong> Apache Spark \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 Scala, \u0438 Scala API &#8212; \u043e\u0434\u0438\u043d \u0438\u0437 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0445 \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043d\u0438\u043c. \u041e\u0442\u0441\u044e\u0434\u0430 \u0441\u043f\u0440\u043e\u0441 \u0432 \u0434\u0430\u0442\u0430-\u0438\u043d\u0436\u0438\u043d\u0438\u0440\u0438\u043d\u0433\u0435.<\/li>\n<li><strong>\u0412\u044b\u0441\u043e\u043a\u043e\u043d\u0430\u0433\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434.<\/strong> \u0421\u0435\u0440\u0432\u0438\u0441\u044b \u043d\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u0441\u0442\u0435\u043a\u0430\u0445 (Cats Effect, ZIO), \u0430\u043a\u0442\u043e\u0440\u043d\u0430\u044f \u043c\u043e\u0434\u0435\u043b\u044c (Akka \u0438 \u0435\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u0444\u043e\u0440\u043a Apache Pekko), \u0432\u0435\u0431-\u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a Play.<\/li>\n<li><strong>\u0424\u0438\u043d\u0442\u0435\u0445 \u0438 \u0441\u0442\u0440\u0438\u043c\u0438\u043d\u0433<\/strong> &#8212; \u0442\u0430\u043c, \u0433\u0434\u0435 \u0446\u0435\u043d\u044f\u0442 \u0441\u0442\u0440\u043e\u0433\u0443\u044e \u0442\u0438\u043f\u0438\u0437\u0430\u0446\u0438\u044e \u0438 \u043f\u0440\u0435\u0434\u0441\u043a\u0430\u0437\u0443\u0435\u043c\u0443\u044e \u0440\u0430\u0431\u043e\u0442\u0443 \u0441 \u043a\u043e\u043d\u043a\u0443\u0440\u0435\u043d\u0442\u043d\u043e\u0441\u0442\u044c\u044e.<\/li>\n<\/ul>\n<p>\u0427\u0435\u0441\u0442\u043d\u043e \u043e \u043c\u0438\u043d\u0443\u0441\u0430\u0445: \u0432\u0430\u043a\u0430\u043d\u0441\u0438\u0439 \u043d\u0430 Scala \u043c\u0435\u043d\u044c\u0448\u0435, \u0447\u0435\u043c \u043d\u0430 Java \u0438\u043b\u0438 Kotlin, \u0430 \u043f\u043e\u0440\u043e\u0433 \u0432\u0445\u043e\u0434\u0430 \u0432\u044b\u0448\u0435. \u041a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044f \u043a\u0440\u0443\u043f\u043d\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432 \u0437\u0430\u043c\u0435\u0442\u043d\u043e \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u0435\u0435, \u0447\u0435\u043c \u0443 Java, \u0445\u043e\u0442\u044f \u0438\u043d\u043a\u0440\u0435\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u0441\u0431\u043e\u0440\u043a\u0430 \u0432 sbt \u0447\u0430\u0441\u0442\u0438\u0447\u043d\u043e \u044d\u0442\u043e \u0441\u0433\u043b\u0430\u0436\u0438\u0432\u0430\u0435\u0442.<\/p>\n<p>\u0414\u043e\u0440\u043e\u0436\u043d\u0430\u044f \u043a\u0430\u0440\u0442\u0430 \u0434\u043e \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0430\u0440\u0442\u0435\u0444\u0430\u043a\u0442\u0430:<\/p>\n<ol>\n<li>\u0423\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c JDK \u0438 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala<\/code>, \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u043f\u0440\u0438\u043c\u0435\u0440 \u0432\u044b\u0448\u0435.<\/li>\n<li>\u0420\u0430\u0437\u043e\u0431\u0440\u0430\u0442\u044c <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val<\/code>\/<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">var<\/code>\/<code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">def<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">case class<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">match<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Option<\/code>, \u043d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438.<\/li>\n<li>\u0421\u043e\u0437\u0434\u0430\u0442\u044c \u043f\u0440\u043e\u0435\u043a\u0442 \u0432 sbt (\u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0439 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u0441\u0431\u043e\u0440\u043a\u0438; \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u0430 &#8212; Mill) \u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0442\u0435\u0441\u0442\u044b \u043d\u0430 MUnit \u0438\u043b\u0438 ScalaTest.<\/li>\n<li>\u0421\u043e\u0431\u0440\u0430\u0442\u044c \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 CLI \u0438\u043b\u0438 HTTP-\u0441\u0435\u0440\u0432\u0438\u0441 \u0438 \u0432\u044b\u043b\u043e\u0436\u0438\u0442\u044c \u0432 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 &#8212; \u044d\u0442\u043e \u0438 \u0435\u0441\u0442\u044c \u043f\u0435\u0440\u0432\u044b\u0439 \u0430\u0440\u0442\u0435\u0444\u0430\u043a\u0442 \u0434\u043b\u044f \u043f\u043e\u0440\u0442\u0444\u043e\u043b\u0438\u043e.<\/li>\n<li>\u0412\u044b\u0431\u0440\u0430\u0442\u044c \u043d\u0438\u0448\u0443: Spark \u0434\u043b\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434 \u043d\u0430 Cats Effect\/ZIO.<\/li>\n<\/ol>\n<p>\u0421 \u043e\u043f\u044b\u0442\u043e\u043c Java \u044d\u0442\u043e\u0442 \u043f\u0443\u0442\u044c \u043e\u0431\u044b\u0447\u043d\u043e \u043f\u0440\u043e\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0431\u044b\u0441\u0442\u0440\u0435\u0435, \u0431\u0435\u0437 \u043d\u0435\u0433\u043e &#8212; \u0434\u043e\u043b\u044c\u0448\u0435: \u0441\u0440\u043e\u043a \u0441\u0438\u043b\u044c\u043d\u043e \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0438.<\/p>\n<h2 id=\"s9\">\u0412\u044b\u0432\u043e\u0434\u044b<\/h2>\n<ul>\n<li>Scala &#8212; \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0442\u0438\u043f\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u044f\u0437\u044b\u043a \u0434\u043b\u044f JVM, \u0433\u0434\u0435 \u041e\u041e\u041f \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0439 \u0441\u0442\u0438\u043b\u044c \u0440\u0430\u0432\u043d\u043e\u043f\u0440\u0430\u0432\u043d\u044b; \u0435\u0441\u0442\u044c \u0442\u0430\u043a\u0436\u0435 Scala.js \u0438 Scala Native.<\/li>\n<li>\u041d\u043e\u0432\u0438\u0447\u043a\u0443 \u0432 2026 \u0433\u043e\u0434\u0443 \u0441\u0442\u043e\u0438\u0442 \u0443\u0447\u0438\u0442\u044c Scala 3, \u043d\u043e \u0443\u043c\u0435\u0442\u044c \u0447\u0438\u0442\u0430\u0442\u044c \u043a\u043e\u0434 2.13 &#8212; \u043d\u0430 \u043d\u0435\u043c \u043c\u043d\u043e\u0433\u043e \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u044d\u043a\u043e\u0441\u0438\u0441\u0442\u0435\u043c\u0443 Spark.<\/li>\n<li>\u0411\u0430\u0437\u043e\u0432\u044b\u0435 \u043f\u043e\u043d\u044f\u0442\u0438\u044f \u0434\u043b\u044f \u0441\u0442\u0430\u0440\u0442\u0430: <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">val<\/code> \u043f\u0440\u043e\u0442\u0438\u0432 <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">var<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">case class<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">match<\/code>, <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">Option<\/code> \u0432\u043c\u0435\u0441\u0442\u043e <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">null<\/code>, \u043d\u0435\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438.<\/li>\n<li>\u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043d\u0438\u0448\u0438 &#8212; \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0432\u044b\u0441\u043e\u043a\u043e\u043d\u0430\u0433\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434; \u0432\u0430\u043a\u0430\u043d\u0441\u0438\u0439 \u043c\u0435\u043d\u044c\u0448\u0435, \u0447\u0435\u043c \u043d\u0430 Java, \u0430 \u043f\u043e\u0440\u043e\u0433 \u0432\u0445\u043e\u0434\u0430 \u0432\u044b\u0448\u0435.<\/li>\n<\/ul>\n<h2 id=\"s10\">\u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \/ \u0441\u0432\u044f\u0437\u044c \u0441 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u043e\u0439<\/h2>\n<div class=\"oj-cta\" style=\"background:#fbf4e4;border-left:4px solid #c9962b;border-radius:8px;padding:16px 20px;margin:24px 0\">\n<p style=\"margin:0 0 8px\"><strong>\u041e\u0441\u0432\u043e\u0439\u0442\u0435 \u0442\u0435\u043c\u0443 \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435<\/strong><\/p>\n<p>Scala \u043b\u0443\u0447\u0448\u0435 \u0432\u0441\u0435\u0433\u043e \u043e\u0441\u0432\u0430\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043d\u0430 \u0437\u0430\u0434\u0430\u0447\u0430\u0445, \u0431\u043b\u0438\u0437\u043a\u0438\u0445 \u043a \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u043c: \u0441\u0435\u0440\u0432\u0438\u0441 \u0441 \u0442\u0435\u0441\u0442\u0430\u043c\u0438, \u0440\u0430\u0431\u043e\u0442\u0430 \u0441 \u043a\u043e\u043d\u043a\u0443\u0440\u0435\u043d\u0442\u043d\u043e\u0441\u0442\u044c\u044e, \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043f\u043e\u0442\u043e\u043a\u043e\u0432 \u0434\u0430\u043d\u043d\u044b\u0445. \u0415\u0441\u043b\u0438 \u043d\u0443\u0436\u0435\u043d \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0439 \u043f\u0443\u0442\u044c \u043e\u0442 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441\u0430 \u0434\u043e production-\u043a\u043e\u0434\u0430 \u043d\u0430 Scala 3 \u0441 \u0440\u0430\u0437\u0431\u043e\u0440\u043e\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a, \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u0442\u0435 <a href=\"https:\/\/otus.ru\/lessons\/scala\/?int_article=scala-chto-nuzhno-znat-nachinajushhim-programmistam&amp;int_place=article&amp;int_variant=v1\">\u043a\u0443\u0440\u0441 \u043f\u043e Scala-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435<\/a>. \u0427\u0442\u043e\u0431\u044b \u0441\u043d\u0430\u0447\u0430\u043b\u0430 \u043e\u0446\u0435\u043d\u0438\u0442\u044c \u0444\u043e\u0440\u043c\u0430\u0442 \u0438 \u0443\u0440\u043e\u0432\u0435\u043d\u044c, \u043f\u043e\u0434\u043e\u0439\u0434\u0443\u0442 \u0431\u0435\u0441\u043f\u043b\u0430\u0442\u043d\u044b\u0435 <a href=\"https:\/\/otus.ru\/events\/?int_article=scala-chto-nuzhno-znat-nachinajushhim-programmistam&amp;int_place=article&amp;int_variant=v1\">\u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0435 \u0443\u0440\u043e\u043a\u0438<\/a> Otus.<\/p>\n<\/div>\n<h2 id=\"s11\">FAQ<\/h2>\n<p><strong>\u041d\u0443\u0436\u043d\u043e \u043b\u0438 \u0437\u043d\u0430\u0442\u044c Java \u043f\u0435\u0440\u0435\u0434 Scala?<\/strong><br \/>\n\u041d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u043d\u043e \u043f\u043e\u043b\u0435\u0437\u043d\u043e \u043f\u043e\u043d\u0438\u043c\u0430\u0442\u044c JVM \u0438 \u0443\u043c\u0435\u0442\u044c \u0447\u0438\u0442\u0430\u0442\u044c Java-\u043a\u043e\u0434: \u043c\u043d\u043e\u0433\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0430\u0445 \u043f\u0440\u0438\u0445\u043e\u0434\u044f\u0442 \u0438\u0437 Java-\u043c\u0438\u0440\u0430.<\/p>\n<p><strong>\u041c\u043e\u0436\u043d\u043e \u043b\u0438 \u043f\u0438\u0441\u0430\u0442\u044c \u043d\u0430 Scala Android-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f?<\/strong><br \/>\n\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438 \u044d\u0442\u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u043d\u043e \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 \u0434\u043b\u044f Android \u0432\u044b\u0431\u0438\u0440\u0430\u044e\u0442 Kotlin: \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u0438 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438 Google \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u043d\u0435\u0433\u043e.<\/p>\n<p><strong>\u0427\u0442\u043e \u0432\u044b\u0431\u0440\u0430\u0442\u044c \u0434\u043b\u044f \u0441\u0431\u043e\u0440\u043a\u0438: sbt \u0438\u043b\u0438 scala-cli?<\/strong><br \/>\n\u0414\u043b\u044f \u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432 \u0438 \u043f\u0435\u0440\u0432\u044b\u0445 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u043e\u0432 \u0443\u0434\u043e\u0431\u0435\u043d <code style=\"background:#eef0f3;color:#24292f;border-radius:4px;padding:1px 5px;font-size:0.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace\">scala<\/code> (Scala CLI), \u0434\u043b\u044f \u043c\u043d\u043e\u0433\u043e\u043c\u043e\u0434\u0443\u043b\u044c\u043d\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432 \u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u0435 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u043c \u043e\u0441\u0442\u0430\u0435\u0442\u0441\u044f sbt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scala &#8212; \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0442\u0438\u043f\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u044f\u0437\u044b\u043a \u043e\u0431\u0449\u0435\u0433\u043e \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u043e\u0431\u044a\u0435\u043a\u0442\u043d\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435. \u041e\u0441\u043d\u043e\u0432\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430 &#8212; JVM: \u043a\u043e\u0434 \u043d\u0430 Scala \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432 \u0431\u0430\u0439\u0442-\u043a\u043e\u0434 \u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0440\u044f\u0434\u043e\u043c \u0441 Java-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u043c\u0438. \u0415\u0441\u0442\u044c \u0438 \u0434\u0432\u0435 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0446\u0435\u043b\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 &#8212; Scala.js (JavaScript) \u0438 Scala Native (\u043c\u0430\u0448\u0438\u043d\u043d\u044b\u0439 \u043a\u043e\u0434 \u0447\u0435\u0440\u0435\u0437 LLVM). \u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u041a\u043e\u0440\u043e\u0442\u043a\u043e \u043e \u044f\u0437\u044b\u043a\u0435 \u0438 \u0435\u0433\u043e \u0438\u0441\u0442\u043e\u0440\u0438\u0438 Scala 2 \u0438 Scala [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":11307,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[597,65],"class_list":["post-11306","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-polza","tag-scala","tag-programmirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"Scala \u0434\u043b\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0449\u0438\u0445: \u044f\u0437\u044b\u043a \u043d\u0430 JVM \u0441 \u041e\u041e\u041f \u0438 \u0424\u041f, \u0447\u0435\u043c Scala 3 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