求助各位大神，js如何将下面的数组根据前面3个元素进行分类组装！！！

var array =
[
[0,1,"src",{"datatime":201705230201}],
[1,1,"dst",{"datatime":201705230205}],
[0,1,"src",{"datatime":201705230202}],
[1,1,"dst",{"datatime":201705230206}],
[0,1,"dst",{"datatime":201705230204}],
[1,1,"src",{"datatime":201705230207}],
[0,1,"dst",{"datatime":201705230203}],
[1,1,"src",{"datatime":201705230208}]
];

var result = [], tmp = {};
for(var i=0;i<array.length;i++){
    var ai = array[i];
    var key = "";
    for(var j=0;j<3;j++){
        key += ai[j];
    }
    if(!tmp[key]){
        var arr = [];
        for(var j=0;j<3;j++){
            arr.push(ai[j]);
        }
        arr.push([ai[3]]);
        tmp[key] = arr;
    }else{
        var dt = tmp[key][3];
        dt.push(ai[3]);
    }
}
for(var p in tmp){
    result.push(tmp[p]);
}
array = result;
console.log(array);

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