描述：存在这样的json数组数据，根据不同id(id也在json里面)获取相应的数据(数据必须存在才获取)，具体看实例

var data = [
    {
        "id": 363,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491815740687.jpg"
    },
    {
        "id": 363,
        "content": ""
    },
    {
        "id": 363,
        "content": ""
    },
    {
        "id": 363,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811216888.jpg"
    },
    {
        "id": 363,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811218552.JPG"
    },
    {
        "id": 364,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811159927.png"
    },
    {
        "id": 364,
        "content": ""
    },
    {
        "id": 364,
        "content": ""
    },
    {
        "id": 364,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811167815.jpg"
    },
    {
        "id": 364,
        "content": ""
    },
    {
        "id": 365,
        "content": ""
    },
    {
        "id": 365,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811175762.png"
    },
    {
        "id": 365,
        "content": ""
    },
    {
        "id": 365,
        "content": ""
    },
    {
        "id": 365,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811179370.jpg"
    },
    {
        "id": 366,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811185387.jpg"
    },
    {
        "id": 366,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811187146.jpg"
    },
    {
        "id": 366,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811188690.JPG"
    },
    {
        "id": 366,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811197842.JPG"
    },
    {
        "id": 366,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811199545.png"
    },
    {
        "id": 367,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811207099.png"
    },
    {
        "id": 367,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811208608.jpg"
    },
    {
        "id": 367,
        "content": ""
    },
    {
        "id": 367,
        "content": ""
    },
    {
        "id": 367,
        "content": ""
    },
    {
        "id": 368,
        "content": ""
    },
    {
        "id": 368,
        "content": ""
    },
    {
        "id": 368,
        "content": ""
    },
    {
        "id": 368,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811216888.jpg"
    },
    {
        "id": 368,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811218552.JPG"
    },
    {
        "id": 369,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811231985.png"
    },
    {
        "id": 369,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811230524.jpg"
    },
    {
        "id": 369,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811228955.jpg"
    },
    {
        "id": 369,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811227399.jpg"
    },
    {
          "id": 369,
          "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811225656.JPG"
    },
    {
        "id": 370,
        "content": ""
    },
    {
        "id": 370,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811238378.jpg"
    },
    {
        "id": 370,
        "content": "/upload/front/order/itemList/zanCut/2017/04/10/1491811240198.png"
    },
    {
        "id": 370,
        "content": ""
    },
    {
        "id": 370,
        "content": ""
    }
];

// 数组去重
Array.prototype.unique = function () {
    var obj = [],
        arr = [],
        val = '',
        type = '';

    for (var i = 0, len = this.length; i < len; i++) {
        val = this[i];
        type = typeof val;

        // 若不存在obj[val]，则val一定会被push进arr
        if (!obj[val]) {
            // 将val的数据类型存放到obj[val]，处理极端情况会用到
            obj[val] = [type];
            arr.push(val);
        } else if (obj[val].indexOf(type) < 0) {
            // 若obj[val]已存在（键值会执行toString()转换，可能会得到相同的obj[val]，但obj[val]里的type一定是唯一的）
            obj[val].push(type);
            arr.push(val);
        }
    }

    return arr;
}

var idArr      = [],
    idTemp1    = [],
    idTemp2    = [],
    contentArr = [],
    valueObj   = {};

for (var i = 0, len = data.length; i < len; i++) {
    if (data[i].content) {
        // 当且仅当data[i].content有值，才将id push进数组idArr
        // 以及将id、conetnt push进contentArr
        idArr.push(data[i].id);
        contentArr.push([data[i].id, data[i].content]);
    } else {
        // 若content为空，则push false 到idArr
        idArr.push(false);
    }
}

// 将数组里面的fasle值过滤掉
idTemp1 = idArr.filter(function (val) {
    if (val !== false) return val;
});

// 去掉重复的id（数组去重）
idTemp2 = idTemp1.unique();

if (idTemp2.length > 0) {
    idTemp2.forEach(function (val) {
        valueObj[val] = [];

        contentArr.forEach(function (value) {
            if (val === value[0]) {
                valueObj[value[0]].push(value[1]);
            }
        });
    });
}
console.log(valueObj);