js对数组内对象去重

var array = [{id:1,name:'jack'},{id:3,name:'tom'},{id:3,name:'liwei'},{id:5,name:'lkiki'},{id:5,name:'opoi'},{id:7,name:'lily'}];
    var hash = {};
    array = array.reduce(function (item, next) {
        hash[next.id] ? '' : hash[next.id] = true && item.push(next);
        return item;
        }, []);
    console.log(array);

说明：array数组里面有5个对象，其中第二个{id:3,name:'tom'}和第三个{id:3,name:'liwei'}中的id属性重复，如果id是判断对象重复的条件，那么使用array.reduce()方法进行去重，运行结果如下

如上红框里面只有4个对象