Created
July 11, 2012 18:20
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二次元配列内の数値を合計する
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// total とリスト内の全ての数値に与えられた演算処理を行い、total を逐次更新する | |
// リスト内の要素が全て Number であることが前提 | |
List op_inject := method(op_str, | |
Number inject_op := Number getSlot(op_str) | |
total := 0 | |
call target foreach(v, total = total inject_op(v)) | |
return total) | |
// ネストしているリストにも対応 | |
List sum := method( | |
call target map( v, | |
if(v proto != List, | |
v, | |
v sum)) op_inject("+")) | |
l := list(1,2,3,4,5) | |
l sum println //==> 15 | |
l := list(list(1,2,3), list(4,5,6), list(7,8,9)) | |
l sum println //==> 45 | |
l := list(list(1,2,3), list(4,5,6), list(7,8,9, list(10, 11))) | |
l sum println //==> 66 |
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