javaScript 数组对象取出某一列

let arr = [ {id:3,name:'张三'},  {id:4,name:'李四'}, {id:5,name:'王五'}]
let arr2 = arr.map(v => {return v.name})

console.dir(arr2)
/*
    Array(3)
    0: "张三"
    1: "李四"
    2: "王五"
    length: 3
*/