在另一个方法中使用一个forEach方法中的变量 [英] Use variable from one forEach Method in another

问题描述

我试图在另一个getJSON和forEach方法中使用一个值.我有什么办法吗?

I am trying to use a value from inside one getJSON, forEach method in another. Is there any way for me to do that?

JavaScript

JavaScript

$.getJSON(json1, result => {
    result.forEach((elem, i, array) => {
       $('#x').text(elem.x);                            
       $('#y').text(elem.y);
});

$.getJSON(json2, result => {
    result.forEach((elem, i, array) => {
       $('#v').text(elem.v);                            
       $('#pv').text(elem.pv);
});

我想在json2中使用json1中的elem.x.我需要能够计算elem.x/elem.v.有什么办法吗?

I want to use elem.x from json1 inside json2. I need to be able to calculate elem.x/elem.v. Is there any way to do that?

推荐答案

根据您所写的评论，我更喜欢这样做(认为两者的长度相同):

By the comment you wrote, I'd prefer do it like this (think that both will have same length):

var first, second;
$.when(
    $.getJSON(json1, result => first = result),
    $.getJSON(json2, result => second = result)
).then(function() {
    if (first && second) {
        let results = first.map((item, index) => item.x / second[index].v);
        // do whatever you want
    }
});

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