オブジェクト指å‘ã«ãŠã‘ã‚‹Visitorパターンã¯ã€F代数ã«ã‚ˆã‚‹Î¼å†å¸°ã‚’ Church encoding ã—ãŸã‚‚ã®æŸæ‰€ã§ ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆæŒ‡å‘ (OOP) ã«ãŠã‘ã‚‹ Visitorパターン ã«ã¤ã„ã¦è©±ã•ã‚Œã¦ã„ãŸã®ã§ã€è‡ªåˆ†ã®é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®ãƒ¡ãƒ¢ç”¨ã«æ•´ç†ã—ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ （Twitterã§æ›¸ãã«ã¯å°‘ã—é•·ã™ãŽãŸã®ã§ã€ã“ã¡ã‚‰ã«æ•´ç†ï¼‰ 2021/01/10 EDIT: Church (Boehm–Berarducci) エンコーディングã¨Vistorパターンã«ã¤ã„ã¦ã®å…·ä½“çš„ãªäº‹ä¾‹ã¯ã€ã“ã¡ã‚‰ã®è¨˜äº‹ãŒåˆ†ã‹ã‚Šã‚„ã™ã„ã®ã§ã€ã”å‚ç…§ãã ã•ã„。 Haskell for all: The visitor pattern is essentially the same thing as Church encoding æ¦‚è¦ OOP ã«ãŠã‘ã‚‹ Visitor パターンã¯ã€é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°çš„ã«è¨€ãˆã°ã€ï¼ˆãƒ‘ターンマッãƒã™ã‚‹ï¼‰F代数ã«ã‚ˆã‚‹Î¼å†å¸°ã‚’ Church encoding ã—ãŸã‚‚ã®ã€‚ ã¤ã¾ã‚Šã€ を関数é©ç”¨ã—ã¦ã€çµæžœ a
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