如何在jQuery中将项目添加到数组中? [英] How do I add items to an array in jQuery?

问题描述

var list = [];
$.getJSON("json.js", function(data) {
    $.each(data, function(i, item) {
        console.log(item.text);
        list.push(item.text);
    });
});
console.log(list.length);

list.length始终返回0.我在firebug中浏览了JSON，它的格式正确，一切都很好.我只是似乎无法将一个项目添加到数组中，所以我缺少了什么?

list.length always returns 0. I've browsed the JSON in firebug and it's well formed and everything looks fine. I just can't seem to add an item to the array what am I missing?

推荐答案

由于$.getJSON是异步的，我认为您的console.log(list.length);代码在填充数组之前就已触发.要更正此问题，请将您的console.log语句放入回调中:

Since $.getJSON is async, I think your console.log(list.length); code is firing before your array has been populated. To correct this put your console.log statement inside your callback:

var list = new Array();
$.getJSON("json.js", function(data) {
    $.each(data, function(i, item) {
        console.log(item.text);
        list.push(item.text);
    });
    console.log(list.length);
});

这篇关于如何在jQuery中将项目添加到数组中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！