组合两个数组以在ruby中创建二维数组

Question

a = [1, 2, 3]
b = [4, 5, 6]

如何在2D数组中组合两个数组？：

[[1, 4], [2, 5], [3, 6]]

Answer 1

尝试Array#zip

a.zip(b)
=> [[1,4],[2,5],[3,6]]

Answer 2

虽然zip显然是最直接的答案，但这也有效：

[a, b].transpose
=> [[1, 4], [2, 5], [3, 6]]