Ruby Tricks: Array.take

luoping0425 · June 21, 2012 · Last by ekim_sgra replied at June 21, 2012 · 2535 hits

Array.take

take(n) → new_ary

Returns first n elements from ary.

a = [1, 2, 3, 4, 5, 0] a.take(3) #=> [1, 2, 3]

Array 的 take 方法,用来获取前 n 个元素。

Unknow user #2 June 21, 2012

这样也可以:a[0...3]

还可以 a[0..3-1]

想到了 haskell

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