Js数组去重

set方法去重

var list = [111, 111, 222, 333]
    let set = Array.from(new Set(list))
    console.log(set)

filter方法去重

var array = [{ name: "aa" }, { name: "aa" }, { name: "bb" }]
    const res = new Map();
    var filter = array.filter((item) => !res.has(item.name) && res.set(item.name, 1))
    console.log(filter)