Created
March 8, 2012 01:55
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配列の転置 ref: http://qiita.com/items/3060
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| # Array#transpose | |
| a = [[1,2,3],[4,5,6],[7,8,9]] | |
| a.transpose | |
| #=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]] | |
| # same return | |
| a[0].zip(*a[1..-1]) | |
| #=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]] |
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