在JavaScript中将字符串数组拆分为浮点数数组 [英] Splitting an array of strings to an array of floats in JavaScript

问题描述

我正在尝试拆分称为顶点"的字符串数组，并将其存储为浮点数数组.

I am trying to split an array of strings, called 'vertices' and store it as an array of floats.

当前字符串数组包含三个元素:["0 1 0", "1 -1 0", '-1 -1 0"]

Currently the array of strings contains three elemets: ["0 1 0", "1 -1 0", '-1 -1 0"]

我需要的是一个包含所有这些数字作为单独元素的浮点数组:[0, 1, 0, 1, -1, 0, -1, -1, 0]

What I need is an array of floats containing all these digits as individual elements: [0, 1, 0, 1, -1, 0, -1, -1, 0]

我按如下方式使用split()函数:

I used the split() function as follows:

for(y = 0; y < vertices.length; y++)
{
    vertices[y] = vertices[y].split(" "); 
}

...这使我看起来像是我所追求的，除了它仍然由三个字符串数组组成.

...which gives me what looks to be what I am after except it is still made up of three arrays of strings.

如何将parseFloat()与split()结合使用，以确保所有元素都是独立的且类型为float?

How might I use parseFloat() with split() to ensure all elements are separate and of type float?

推荐答案

您可以使用

You can use Array.prototype.reduce method for this:

var result = ["0 1 0", "1 -1 0", "-1 -1 0"].reduce(function(prev, curr) {
    return prev.concat(curr.split(' ').map(Number));
}, []);

alert(result); // [0, 1, 0, 1, -1, 0, -1, -1, 0]

如果需要，您当然可以使用.map(parseFloat)代替.map(Number).

Instead of .map(Number) you can use .map(parseFloat) of course if you need.

或更短:

var result = ["0 1 0", "1 -1 0", "-1 -1 0"].join(' ').split(' ').map(Number);

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