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"

我该怎么办？我尝试了join方法并获得了第二个和第五个方法。但是当字长不同时：

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

我不知道该怎么做。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"

Answer 2

您可以尝试这样的事情：

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

Answer 3

希望这会有所帮助

a = [["b","i","r","d"], ["c","a","t"]]
result = a.collect{ |_,s,*__| s }.join
p result 
# => "ia"