js根据数组id取值

[梦在心中_加油]

有个js对象数组var ary=[{id:1,sortrank:1,name:"空调"},{id:2,sortrank:2,name:"风扇"},{id:3,sortrank:3,name:"油烟机"}]，

有一个参数传进来，假设那个参数是变量a，传进来的参数是数组的id，我想要的效果就是传进来的id对应取出那个id下的name存到变量b就可以了

[天际的海浪]

var ary=[{id:1,sortrank:1,name:"空调"},{id:2,sortrank:2,name:"风扇"},{id:3,sortrank:3,name:"油烟机"}];

function getNameById(id) {
	for (var i = 0; i < ary.length; i++)
		if (ary[i].id == id)
			return ary[i].name;
}

var a = 2;
var b = getNameById(a);
alert(b);

[Hello World,]

var arr=[{id:1,sortrank:1,name:"空调"},{id:2,sortrank:2,name:"风扇"},{id:3,sortrank:3,name:"油烟机"}];
 
var dict = {};
for (var i = 0; i < arr.length; i++){
    dict[arr[i].id]=arr[i];
}
 
var a = 2;
var b = dict[a];
console.log(b);
alert(b.name);