javascript将值设置为Associative Arrays

Question

如何将javascript中的值设置为关联数组？

为什么在这种情况下我得到错误:"car [0]未定义"

var car = new Array();
car[0]['name'] = 'My name';

Answer 1

因为你从未定义过car[0].您必须使用(空)对象初始化它:

var car = [];
car[0] = {};
car[0]['name'] = 'My name';

另一种解决方案是:

var car = [{name: 'My Name'}];

或者这个:

var car = [];
car[0] = {name: 'My Name'};

或者这个:

var car = [];
car.push({name: 'My Name'});