Javascript - 在对象中插入一个项目

Question

如何在 Javascript 中的对象中插入项目？

var colorData = new Object();
var stateData = {
           states:
            [
              { 'state' : 'CA', 'color' : '#61c419', 'amaguide' : '5'},
              { 'state' : 'AZ', 'color' : '#61c419', 'amaguide' : '5'}
            ]
    }

for (var i = 0; i < stateData.length; i++) {            
       colorData.push(stateData[i].state + ':' + stateData[i].color);            
    }

--------------------已编辑--------------------

我想要以下格式的新colorData:-

{'CA': '#61c419', 'AZ':'#61c419'}

谢谢

Answer 1

<强> Array.prototype.map() 是你的 friend :

var stateData = {
           states:
            [
              { 'state' : 'CA', 'color' : '#61c419', 'amaguide' : '5'},
              { 'state' : 'AZ', 'color' : '#61c419', 'amaguide' : '5'}
            ]
    };


var colorData = stateData.states.map(function(ele) {
    return ele.state + ':' + ele.color;
});

如果您希望结果为{CA: '#61c419', AZ: '#61c419'}，则:

var colorData = stateData.states.reduce(function(v, w) {
    v[w.state] =  w.color;
    return v; 
}, {});