From: Brian Candler <b.candler@...>
Date: 2010-05-02T17:36:40+09:00
Subject: Re: how can i get that kind of transpose?

Pen Ttt wrote:
> there is text1
> 1,2,3,4
> 1,2,3
> 1,2
> 1,2,3,4,5
> what i want to get is text2:
> 1，1，1，1
> 2，2，2，2
> 3，3，   3
> 4，   4
> 5

Is this what you want?

>> a = [[1,2,3,4,nil],[1,2,3,nil,nil],[1,2,nil,nil,nil],[1,2,3,4,5]]
=> [[1, 2, 3, 4, nil], [1, 2, 3, nil, nil], [1, 2, nil, nil, nil], [1, 
2, 3, 4, 5]]
>> a.transpose
=> [[1, 1, 1, 1], [2, 2, 2, 2], [3, 3, nil, 3], [4, nil, nil, 4], [nil, 
nil, nil, 5]]
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