js對象數組(JSON) 根據某個共同字段 分組

但願的是將下面的對象數組：

[
    {"id":"1001","name":"值1","value":"111"},
    {"id":"1001","name":"值1","value":"11111"},
    {"id":"1002","name":"值2","value":"25462"},
    {"id":"1002","name":"值2","value":"23131"},
    {"id":"1002","name":"值2","value":"2315432"},
    {"id":"1003","name":"值3","value":"333333"}
]

根據相同id字段分組，轉換成下面這種形式：

[
    {
        "id": "1001",
        "name": "值1",
        "data": [ {"id": "1001", "name": "值1", "value": "111"}, { "id": "1001", "name": "值1", "value": "11111"} ] },
    {
        "id": "1002",
        "name": "值2",
        "data": [ { "id": "1002", "name": "值2", "value": "25462" }, { "id": "1002", "name": "值2", "value": "23131"}, {"id": "1002", "name": "值2","value": "2315432" } ] },
    {
        "id": "1003",
        "name": "值3",
        "data": [ {"id": "1003", "name": "值3", "value": "333333" } ] }
]

作法：

var arr = [
    {"id":"1001","name":"值1","value":"111"},
    {"id":"1001","name":"值1","value":"11111"},
    {"id":"1002","name":"值2","value":"25462"},
    {"id":"1002","name":"值2","value":"23131"},
    {"id":"1002","name":"值2","value":"2315432"},
    {"id":"1003","name":"值3","value":"333333"}
];

var map = {},
    dest = [];
for(var i = 0; i < arr.length; i++){
    var ai = arr[i];
    if(!map[ai.id]){
        dest.push({
            id: ai.id,
            name: ai.name,
            data: [ai]
        });
        map[ai.id] = ai;
    }else{
        for(var j = 0; j < dest.length; j++){
            var dj = dest[j];
            if(dj.id == ai.id){
                dj.data.push(ai);
                break;
            }
        }
    }
}

console.log(dest);