将数组仅按一级推入红宝石中的数组 [英] Push array into array on ruby by just one level

问题描述

给出：

a = [[1,"a"],[2,"b"]]
b = [[3,"c"],[4,"d"]]

I想要将 a 转换为 [[1， a]，[2， b] [3， c]，[4 ， d]] 。没有 + 怎么办？

I want to turn a into [[1,"a"],[2,"b"][3,"c"],[4,"d"]]. How can do this without +? It creates a new array, which I want to avoid.

(a << b).flatten(1)
# => [1, "a", 2, "b", [3, "c"], [4, "d"]]

推荐答案

a.concat(b)

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