ruby-on-rails - 将数组的数组拆分，[0] 拆分为一个，[1] 拆分为另一个

Question

我有一个基本的数组[[1,2],[2,4],[3,6]]

我想把它分成两个数组，这样...

a = [1,2,3]
b = [2,4,6]

Answer 1

您可以简单地使用 Array#transpose如下所示，

arr = [[1,2],[2,4],[3,6]]
# => [[1, 2], [2, 4], [3, 6]] 

a, b = arr.transpose
# => [[1, 2, 3], [2, 4, 6]] 
a
# => [1, 2, 3] 
b
# => [2, 4, 6]