js 数组里的对象去重

Question

需求是：如果数组的name相同，就比较下timestamp，哪个比较大保留哪个，小的去掉。数组如下：var arr = [     {name: "袜子", timestamp: 1537243392},     {name: "月饼", timestamp: 1537243369},     {name: "月饼", timestamp: 1537243411},     {name: "女鞋", timestamp: 1537243241},     {name: "童鞋", timestamp: 1537243204},         ];希望得到的数组结果是：var finalArr = [     {name: "袜子", timestamp: 1537243392},     {name: "月饼", timestamp: 1537243411},     {name: "女鞋", timestamp: 1537243241},     {name: "童鞋", timestamp: 1537243204},         ];

Answer 1

var arr = [
    {name: "袜子", timestamp: 1537243392},
    {name: "月饼", timestamp: 1537243369},
    {name: "月饼", timestamp: 1537243411},
    {name: "女鞋", timestamp: 1537243241},
    {name: "童鞋", timestamp: 1537243204},
];var obj = {};
arr.forEach(v=>{    if (!obj[v.name] || obj[v.name].timestamp < v.timestamp) obj[v.name] = v;
});console.log(Object.values(obj));