js怎么构造非重复的对象数组

 var data= {
    "teas": {
        "tea": [{
            "leas": {
                "lea": [{"lid": 1,"lname":  "l1"},{"lid": 2,"lname": "l2"},{"lid": 3,"lname": "l3"},{"lid": 4,"lname": l4}]
                },
            "tname":"t1" 
            "tid": 1001,
        },
        {
            "lea": {
                "lea": [{"lid": 2,"lname":  "l2"},{"lid": 3,"lname": "l3"},{"lid": 5,"lname": "l5"},{"lid": 8,"lname": "l8"}]
            },
            "tname":"t2" 
            "tid": 1002,
        },
        {
            "lea": {
                "lea": [{"lid": 1,"lname":  "l1"},{"lid": 33,"lname": ""}]
            },
            "tname":"t3" 
            "tid": 1003,
        }
            ],
    },
}

我现在想构造一个数组var info=[{"lid":lid,"lname":lname}...]，把所有的lid和lname装入数组，重复项只保留一个,同时删除lname=“”的项，应该怎么写呢？

http://blog.csdn.net/chengxuyuan20100425/article/details/8497277

extend()，用这个试一下。