处理对象数组时，根据某个属性名相同，求某一项的和

var arry = [
{user_id:1,money:100},
{user_id:2,money:33},
{user_id:1,money:12},
{user_id:3,money:21},
{user_id:2,money:43},
{user_id:1,money:12}
]

var temp = {};
for(var i in arry) {
var key= arry[i].user_id;
if(temp[key]) {
temp[key].money += arry[i].money;
temp[key].user_id = arry[i].user_id;

} else {
temp[key] = {};
temp[key].money = arry[i].money;
temp[key].user_id = arry[i].user_id;
}
}
console.log(temp)

var newArry = [];
for(var k in temp){
newArry.push(temp[k])
}
console.log(newArry)；