第5章:高階関数 関数プログラマの道具箱の途中まで (位置 1740/11175)読み進めましたが、 いままで結構沢山の関数が登場して覚えきれなくなってきました。
とりあえず、今まで出てきた関数を (だいたい登場順に) 書き出してみることにしました。 まだ途中ですが、明日からも書き出し作業を続けることにしました。
( True || False ) == True ( True && False ) == False not True == False succ 'c' == 'd' min 4 5 == 4 max 'a' 'z' == 'z' div 92 3 == 30 mod 14 5 == 4 [1,2,3] ++ [4,5] == [1,2,3,4,5] 'a':" long time" == "a long time" "abcdef" !! 2 == 'c' ( [1,2,3] < [1,2,4] ) == True ( "bbc" > "abc" ) == True ( [1,2,3] <= [1,2,4] ) == True ( "bbc" >= "abc" ) == True ( "abc" == "abc" ) == True (1.0 /= 1.5) == True head [1..] == 1 tail [1,2,3] == [2,3] init [1,2,3,4] == [1,2,3] length ['a'..'z'] == 26 null [] == True reverse [1,2,3] == [3,2,1] take 3 [1..] == [1,2,3] drop 7 [1..10] == [8,9,10] maximum [1,10,2] == 10 minimum [3,2,4] == 2 sum [1,10,100] == 10 product [2,3,4] == 24 elem 4 [1,2,3,4,5] == True take 10 ( cycle "abc") == "abcabcabca" take 5 ( repeat 'x') == "xxxxx" replicate 5 'x' == "xxxxx" odd 5 == True even 8 == True fst (1,'A') == 1 snd (1,'A') == 'A' zip [1..] "ABC" == [(1,'A'),(2,'B'),(3,'C')] show 4.25 == "4.25" (read "4" :: Int) == 4 (minBound :: (Bool, Int, Char)) == (False,-9223372036854775808,'\NUL') (maxBound :: (Bool, Int, Char)) == (True,9223372036854775807,'\1114111') fromIntegral (div 5 3) + 1.5 == 2.5
