如何根据其值的索引拆分数组？

Question

如何使用不确定的条目拆分数组:

["a","b","c","d","e",...]

进入偶数和奇数数组,如:

["a","c","e",...]

和

["b","d","f",...]

Answer 1

根据评论编辑:

arr = [:foo, :foo, :bar, :baz, :qux, :foo]

evens, odds = arr.partition.with_index{ |_, i| i.even? }

evens # [:foo, :bar, :qux]
odds # [:foo, :baz, :foo]