mypyã§Protocolを使ã£ã¦mix-inを利用ã—ãŸã‚¯ãƒ©ã‚¹ã«åž‹ã‚’ã¤ã‘ã‚‹ - podhmo's diaryãŸã¾ã«ã¯ã€ä»–ã®äººã®å½¹ã«ç«‹ã¤è¨˜äº‹ã‚‚書ã“ã†ã¨ã„ã†ã“ã¨ã§æ›¸ã„ã¦ã¿ã‚‹ã€‚ 例ãˆã°ã€ä»¥ä¸‹ã®ã‚ˆã†ãªmix-inを使ã£ãŸã‚³ãƒ¼ãƒ‰ãŒã‚ã‚‹ã¨ã™ã‚‹ã€‚トリビアルãªä¾‹ã§ç‰¹ã«å¿…è¦ã«ãªã‚Šãã†ãªã‚³ãƒ¼ãƒ‰ã§ã¯ãªã„ã‘ã‚Œã©ã€ã¾ã説明ã®ãŸã‚ã®ã‚³ãƒ¼ãƒ‰ãªã®ã§è¨±ã—ã¦ã»ã—ã„。 EnumerableMixinã¯map()ã‚’æä¾›ã—ã¦ã„ã¦ã€ã“ã®map()ã‚„ä»–ã®ãƒ¡ã‚½ãƒƒãƒ‰(定義ã•ã‚Œã¦ã„ãªã„ã‘ã‚Œã©)ã¯ã€each()ã«ä¾å˜ã™ã‚‹ã¨ã„ã†mix-in。ãã—ã¦Listã¯each()を実装ã™ã‚‹ã‚¯ãƒ©ã‚¹ã€‚何ã®å¤‰å“²ã‚‚ãªã„mix-inã®ã‚³ãƒ¼ãƒ‰ã€‚ class EnumerableMixin: def map(self, fn): return [fn(x) for x in self.each()] class List(EnumerableMixin): def __init__(self, xs): self.xs = xs def each(self): return
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