映射数组数组 [英] Map an array of arrays

问题描述

lodash中是否有一种方法可以映射到数组数组上

Is there a method in lodash to map over an array of arrays

我想做这样的事情，以便保持数组的结构.

I would like to do something like this so that it keeps the structure of the array.

def double(x) { return x*2 }

_([[1,2],[3,4]]).somemethod(double) == [[2,4],[6,8]]

推荐答案

您可以使用ES2015箭头功能使代码更简洁:

You can make your code much cleaner with ES2015 arrow functions:

var array = [[1, 2], [3, 4]];
var double = x => x * 2;
var doubledArray = _.map( array, subarray => _.map( subarray, double ));

使用香草JS:

var array = [[1, 2], [3, 4]];
var double = x => x * 2;
var doubledArray = array.map( subarray => subarray.map( double ));

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