对象数组去重并且获取重复的次数

var arr = [
    {name: 'aa',age: 1},
    {name: 'bb',age: 1},
    {name: 'cc',age: 1},
    {name: 'cc',age: 1},
    {name: 'cc',age: 1},
    {name: 'dd',age: 1},
    {name: 'dd',age: 1},
    {name: 'cc',age: 1},
    {name: 'cc',age: 1},
    {name: 'dd',age: 1},
    {name: 'dd',age: 1},
    {name: 'e',age: 1},
    {name: 'e',age: 1},
    {name: 'dd',age: 1},
];
//添加属性number:次数
arr.forEach(tem => {
    tem.number = 1;
});
//去重，并添加次数
for (var i = 0;i < arr.length; i++){
    for (var j = i+1;j < arr.length;j++){
        if (arr[i].name == arr[j].name){
            arr.splice(j,1);
            j--;
            arr[i].number++;
        }
    }
}