拆分数组中的数组

Question

我想在数组中拆分数组,并将第二个元素的字符串混合.

[["c","a","t"], ["d","o","g"]]
...
# => "ao"

我该怎么做？我尝试了这个join方法并得到了第二个和第五个.但是当字长不同时:

[["b","i","r","d"], ["c","a","t"]]

我不知道怎么做.你能给我一些建议吗？

Answer 1

> ary = [["c","a","t"], ["d","o","g"]]
=> [["c", "a", "t"], ["d", "o", "g"]]
> ary.map{|a| a[1]}.join
=> "ao"