1. Null was used as an exception to point out issues. 2. Null used three sentences to summarize the key details. 3. Null's summary highlighted the object, option, exception handling, and Kotlin programming language.Read less
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1. Null was used as an exception to point out issues. 2. Null used three sentences to summarize the key details. 3. Null's summary highlighted the object, option, exception handling, and Kotlin programming language.Read less
Scala稟è°ã®é€šã—方（公開版）
22. Scalaã®ãƒ¡ãƒªãƒƒãƒˆ 1. å°‘ãªã„コードé‡ã§ç”Ÿç”£æ€§å‘上 nï® ä¾‹ Javaã®ä¾‹ List<User> list = new ArrayList<User>(); list.add(user01); .... Collections.sort(list, new Comparator<User>(){ @Override public int compare(User o1, User o2){ return 01.id - o2.id; } }); Scalaã®ä¾‹ val list = List(.... User ....) list sort (_.id < _.id)
命令プãƒã‚¯ã‚™ãƒ©ãƒŸãƒ³ã‚¯ã‚™ã‹ã‚‰é–¢æ•°ãƒ•ã‚šãƒã‚¯ã‚™ãƒ©ãƒŸãƒ³ã‚¯ã‚™ã¸
3. 関数プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®é–¢æ•° æ•°å¦ã§ã„ã†ã¨ã“ã‚ã®é–¢æ•° f(x) = x + 1 ã ã‹ã‚‰ Scala ã§ã¯ •関数定義㫠= (イコール) を使用 •関数内ã§æœ€å¾Œã«è©•ä¾¡ã•ã‚ŒãŸå€¤ãŒè¿”ã‚‹ def f(x: Int) {x + 1} Which is def f(x: Int) = return x + 1 better? def f(x: Int) = x + 1 ※注: 上㮠2ã¤ã¯æ£ã—ã„コードã§ã¯ã‚ã‚Šã¾ã›ã‚“。
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