如何切割数组值？

Question

如何切割数组值？例如，我有：

a=[1,2,3,4,5,6,7,8,9,10]

我需要：

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

Answer 1

a.each_cons(2).to_a
#=> [[1, 2], [2, 3], [3, 4], [4, 5], [5, 6], [6, 7], [7, 8], [8, 9], [9, 10]]