怎么让数组分别循环相加

[gwegh]

下面这段代码是把把name的值为一样的统计其数量，如：a:3 b:2 c:1，现在求各位大神，我想实现让如a:3 price=33(33为想同的name下，price想加得出的结果)
function aa(){
var list = [ {"name":"a", "price": "10"}, {"name":"a", "price": "11"}, {"name":"a", "price": "12"}, {"name":"b", "price": "20"},{"name":"b", "price": "21"},{"name":"c", "price": "30"}];
var list2 = [];
var listMap = {};
for (var i = 0, len = list.length, name, price, key; i < len; i++) {
name = list[i].name;
price = list[i].price;
key = name// + '-' + name; // key为id和name的组合，值为number
if (!!listMap[key]) {
listMap[key]++;
} else {
listMap[key] = 1;
}
}
for (var item in listMap) {
list2.push({
id: item[0],
// name: item.split('-')[1],
number: listMap[item]
})
}
}

[gwegh]

thank you ,不过你这代码写得好风骚

[slwsss]

var list = [ {"name":"a", "price": "10"}, {"name":"a", "price": "11"}, {"name":"a", "price": "12"}, {"name":"b", "price": "20"},{"name":"b", "price": "21"},{"name":"c", "price": "30"}]; var r={} for(var i=0;i<list.length;i++)r[list[i].name]=(r[list[i].name]||0)+parseInt(list[i].price); console.log(r)