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ToDo:


2006-06-06

_ Haskell ¤È printf

Haskell ¤Î²¿¤¬¥À¥á¤Ã¤Æ printf ¥Ç¥Ð¥Ã¥°¤Î¤·¤«¤¿¤¬ ¤ï¤«¤é¤Ê¤¤¤³¤È¤¸¤ã¤Ê¤¤¤«¤È¤³¤Ê¤¤¤À¹Í¤¨¤¿¡£ do ¤ÎÃæ¤Ê¤é´Êñ¤À¤±¤É¡¢ ´Ø¿ô¤ÎÃæ¤Ç¤³¤Î»þÃͤɤ¦¤Ê¤Ã¤Æ¤ë¤Î¡¼¡¢ ¤Ã¤Æ¤¤¤¦¤Î¤ÎÄ´¤Ù¤«¤¿¤¬¤µ¤Ã¤Ñ¤ê¤ï¤«¤é¤Ê¤¤¡£

¤È¤¤¤¦¤«Ä´¤Ù¤é¤ì¤ë¤Î¤«¡£ÌµÍý¤¸¤ã¤Ê¤¤¤Î¤«¡£

ËÍ¤Ï printf ¥Ç¥Ð¥Ã¥°¤¬¹¥¤­¤Ç¹¥¤­¤Ç¤·¤ç¤¦¤¬¤Ê¤¯¤Æ ¤È¤¤¤¦¤«Æ¬¼å¤¤¤«¤é¤« printf ¤òËä¤á¤Ê¤¤¤È ¥×¥í¥°¥é¥à¤òÍý²ò¤¹¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¡£

¤É¤Ã¤«¤Î¿Í¤Ë¤ª¤³¤é¤ì¤½¤¦¤À¤±¤É if ¤Î¸å¤Ë¤Ï´ðËÜŪ¤Ë { ½ñ¤­¤¿¤¯¤Æ¡¢ ¤½¤ì¤Ï¸å¤«¤é if ¤ÎÃæ¤ËÆþ¤Ã¤Æ¤ë¤«¥Á¥§¥Ã¥¯¤¹¤ë¤¿¤á¤Ë printf ¤òËä¤á¤¿¤¤¤È¤¤¤¦¡¢¤½¤ì¤À¤±¤Î¤¿¤á¤Ç¡¢ ¤½¤·¤Æ¤½¤ì¤Ë²ÁÃͤ¬¤¢¤ë¤È¤¤¤¦¤«¡£ if ¤ÎÃæ¤È³°¤¬¤È¤Æ¤â´Êñ¤Ê¾ò·ï¤Ê¤é¤½¤ê¤ã { ¾Êά¤¹¤ë¤±¤É¡¢ ´ðËÜŪ¤Ë¤Ï¤¢¤Ã¤¿Êý¤¬¤¤¤¤¤È¤¤¤¦¤«¡£

ÅÓÃæ¤ÇÁ´Á³°ã¤¦ÏäˤʤäƤ¤¤ë¡£

(06:01)

_ ¥­¥à¥ÁƦÉå

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(06:02)

_ ÁȤ߹ç¤ï¤» in Haskell

http://d.hatena.ne.jp/mr_konn/20060605/1149520643

¤³¤ì¤ò½ñ¤¤¤Á¤ã¤¦ konn ¤µ¤ó¤¹¤²¡¼¤È»×¤¤¤Ä¤Ä¤â

c _ 0 = 1
c n r = (n-r+1) * (c n (r-1)) `div` r

ÉáÄ̤˽ñ¤±¤è¤È¤Ï»×¤Ã¤¿¡£

(06:33)

_ ¤¢¤È dfoldl ¤Ï

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dfoldl f z x y = foldl (\a p -> f a (fst p) (snd p)) z (zip x y)

(06:41)

_ Haskell¤Î¥¯¥é¥¹¤Ã¤Æ

·×»»Î̤ǸÀ¤¦¤È¤³¤í¤Î¥¯¥é¥¹¤ß¤¿¤¤¤Ê´¶¤¸¤Ê¤ó¤À¤Ê¡£ ¤È¤¤¤¦¤«¿ô³Ø¤Ç¸À¤¦¤È¤³¤í¤Î¡¢¤«¡£

(06:53)

_ °ì±þ¹â®²½

c _ 0 = 1
c n r | n > r*2   = (n-r+1) * (c n (r-1)) `div` r
      | otherwise = c n (n-r)

(07:13)

ËÜÆü¤Î¥Ä¥Ã¥³¥ß(Á´2·ï) [¥Ä¥Ã¥³¥ß¤òÆþ¤ì¤ë]
_ YT (2014-05-24 03:56)

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_ shinh (2014-05-24 03:56)

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