js数组相关的一个功能实现问题。

Question

var items = [
{name: "one",amount: 14},
{name: "two",amount: 14},
{name: "one",amount: 11},
{name: "two",amount: 2}
];
var items=[
{name:"one",amount:25},
{name:"two",amount:16}
];
上面得数组怎么进行循环判断才能 得到 下面得数组呢 （amount 是 相同得name 相加） 我想了半天不知道如何判断 相同得名字name, amount 相加。
这个怎么做啊，我研究了好久，但没啥思路

Answer 1

    var items = [
   { name: "one", amount: 14 },
   { name: "two", amount: 14 },
   { name: "one", amount: 11 },
   { name: "two", amount: 2 }
    ];
    var kv = {},i
    for (var i = 0; i < items.length; i++) kv[items[i].name] = (kv[items[i].name] || 0) + items[i].amount;
    items = []
    i = 0;
    for (attr in kv) items[i++] = { name: attr, amount: kv[attr] }
    console.log(items)