Kiểm tra phần tử trùng trong mảng JavaScript

map,array,web_developer

Kiểm tra phần tử trùng trong mảng JavaScript.

const arr = [
 { id: 1, name: "king" },
 { id: 2, name: "master" },
 { id: 3, name: "lisa" },
 { id: 4, name: "ion" },
 { id: 5, name: "jim" },
 { id: 6, name: "gowtham" },
 { id: 1, name: "jam" },
 { id: 1, name: "lol" },
 { id: 2, name: "kwick" },
 { id: 3, name: "april" },
 { id: 7, name: "sss" },
 { id: 8, name: "brace" },
 { id: 8, name: "peiter" },
 { id: 5, name: "hey" },
 { id: 6, name: "mkl" },
 { id: 9, name: "melast" },
 { id: 9, name: "imlast" },
 { id: 10, name: "glow" }
]

function getUnique(arr, comp) {

 const unique = arr
 .map(e => e[comp])

 // store the keys of the unique objects
 .map((e, i, final) => final.indexOf(e) === i && i)

 // eliminate the dead keys & store unique objects
 .filter(e => arr[e]).map(e => arr[e]);

 return unique;
}

console.log(getUnique(arr,'id'); //[{"id":1,"name":"king"},{"id":2,"name":"master"},{"id":3,"name":"lisa"},{"id":4,"name":"ion"},{"id":5,"name":"jim"},{"id":6,"name":"gowtham"},{"id":7,"name":"sss"},{"id":8,"name":"brace"},{"id":9,"name":"melast"},{"id":10,"name":"glow"}]

Remove item in array javascript es6

How to reverse an Array?

Filter Unique Values

Remove array of objects from another array of objects

Kiểm tra phần tử trùng trong mảng JavaScript