js数组对象里面获取某个属性值相等的对象

例：

var outArr=[
	{"name":"张三","id":1,age:18},
	{"name":"李四","id":2,age:19},
	{"name":"王五","id":3,age:18},
	{"name":"小红","id":4,age:20},
	{"name":"小明","id":5,age:17},
	{"name":"小白","id":6,age:18}
];
var newArr = outArr.filter(function (obj) {
    return obj.age== 18;
});
console.log(newArr);    // [{"name":"张三","id":1,age:18},{"name":"王五","id":3,age:18},{"name":"小白","id":6,age:18}]