以å,Clojureã§é³æ¥½çµç¹ããã°ã©ãã³ã°ã«ã¤ãã¦æ¸ããã ãããä»åº¦ã¯Haskellã§æ¸ããã¨æãã Haskellã«ãã鳿¥½æ§é ããã°ã©ãã³ã°ã«ã¤ãã¦ã ããã°ã©ãã鳿¥½ãããã¨ã«ã¤ãã¦ é³æ¥½å®¶ã§ãªãäººãæ°ãã鳿¥½ãä½ããã¨ã ã£ã¦ãã ç¾ä»£é³æ¥½ã§ã¯æåãªã¤ãã¹ ã¯ã»ããã¹ã¨ãã人ããã¾ãããå½¼ã¯é³æ¥½å®¶ãç®æã以åã¯ã建ç¯å®¶ã§ããæ°å¦ã«å ªè½ãªäººã§ãããããã¦ã鳿¥½å®¶ãç®æããããã¦å大ãªç¾ä»£é³æ¥½å®¶ãªãªã´ã£ã¨ã»ã¡ã·ã¢ã³ã«ã師äºããå°ãã¾ããã 鳿¥½å®¶ã«ãªãããã«ãç§ã¯é³æ¥½ã®çè«ãå¦ã³ãããä½ãå¦ã¶ã¹ãã§ãããã? ããã¦ãã¡ã·ã¢ã³ã¯è¨ãã¾ããã åã¯æ°å¦ãç¥ã£ã¦ããããªãããã使²ã«å¿ç¨ããªãã®ããä¼çµ±çãªä¿®ç·´ã¯ããã£ã¦ããªãã¦ãåãã§ã¯ãªãã ããã¦ãã¯ã»ããã¹ã¯æ°ã¥ãã¾ãããããã¦ã鳿¥½ã®æ§ç¯ã«å½¼ã®æã¤æ°å¦çãªç¥èã建ç¯ã®æè¦ã鳿¥½ã«å¿ç¨ãã¦ãæ°ãã鳿¥½ã使²ãã¦ããã¾ãã大å¤ããã
J. Functional Programming 9 (4): 355â372, July 1999. Printed in the United Kingdom c ! 1999 Cambridge University Press 355 A tutorial on the universality and expressiveness of fold GRAHAM HUTTON University of Nottingham, Nottingham, UK http://www.cs.nott.ac.uk/-gmh Abstract In functional programming, fold is a standard operator that encapsulates a simple pattern of recursion for processing lists.
Haskellã®éçãªåæ¤æ»ã¯å¼·åã§ããï¼ããã°ã©ã ã®å®è¡æã«èµ·ããå¾ããã¹ã¦ã®åé¡ã解決ã§ããããã§ã¯ããã¾ãããä¾ãã°ç¬¬5åã§ææããããã«ï¼ä¾ååãæããªãç¾å¨ã®æ¨æºHaskellã§ã¯ï¼æ¤è¨¼ã§ããåé¡ã®ç¯å²ã«éçãããã¾ããã¾ãï¼FFIã使ã£ã¦å¼ã³åºãå¤é¨é¢æ°ã«ã¯ï¼Haskellã®åæ¤æ»ã¯è¡ãå±ãã¾ãããå®è¡åã«éçã«è§£æ±ºã§ããªãåé¡ã¯ï¼å®è¡æã«åçã«è§£æ±ºããå¿ è¦ãããã¾ãããã®ããã®ææ®µãæä¾ããã®ãä¾å¤å¦çã§ãã ä¾å¤å¦çã«ã¤ãã¦ã¯ï¼ããã¾ã§ä½åº¦ãæççã«èª¬æãã¾ãããï¼å ¨ä½åãã¾ã¨ãã¦è§£èª¬ãããã¨ã¯ããã¾ããã§ãããæ¬¡å以éã«FFIã¨ä¾å¤å¦çã¨ã®é¢ä¿ã«ã¤ãã¦èª¬æããåã«ï¼ä»åã¯Haskellã®ä¾å¤å¦çã«ã¤ãã¦ãã¡ãã¨èª¬æãã¦ããã¾ãããã ä¾å¤å¦çã®ä»çµã¿ã¯ï¼GHC 6.10ã«åé²ãããbase 4.0ããã±ã¼ã¸ä»¥éã§å¤§ãã夿´ããã¾ããbaseããã±ã¼ã¸ã¯ããã¡ã¯ãã»ã¹ã¿ã³ã
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Introduction About this tutorial So what's Haskell? What you need to dive in Starting Out Ready, set, go! Baby's first functions An intro to lists Texas ranges I'm a list comprehension Tuples Types and Typeclasses Believe the type Type variables Typeclasses 101 Syntax in Functions Pattern matching Guards, guards! Where!? Let it be Case expressions Recursion Hello recursion! Maximum awesome A few m
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Iâve spilt this post into two so I can cover one concept from a couple of different angles. What I want to do first is explain the major elements of Functional Programming (FP) to those who, like me, might struggle with a lot of mathematical hoopla, Haskell and Lisp code, and second show by simple example where all this stuff is useful in the real world. Meaning I have struggled through the hoopla
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