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问题描述
在使用Javascript(或功能性的语法其他编程语言),如果我有同样大小的两个数组,说 A = [1,2,3,4] 和 B = [5,6,7,8] ,什么是有以下结果的最有效的方法: C = [6,8,10,12] 。
In Javascript (or any other programming language with a functional-like syntax), if I have two arrays of the same size, say a = [1,2,3,4] and b=[5,6,7,8], what is the most efficient way to have the following result: c=[6,8,10,12].
现在,我做的:
a.map(函数(X,I){ 返回X + B [I]})
但我非常希望不涉及使用索引的解决方案。
but ideally I would like a solution that doesn't involve the use of indexes.
推荐答案ES5阵列方法是伟大的,但老为循环更快。
ES5 array methods are great, but old for loops are faster.
var sum = Array(a.length); for(var i=0; i<a.length; ++i) sum[i] = a[i] + b[i];更多推荐
结合相同的大小,并返回总和的两个阵列
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