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Javascript 2018
<!DOCTYPE html>
<html>
<body>
<div id="demo">
<h2>Remove duplicates array of objects</h2>
<button type="button" onclick="loadDoc1()">Change Array String</button>
<button type="button" onclick="loadDoc2()">Change Array Object</button>
</div>
<script>
function loadDoc1() {
const list = ['John', 'Paul', 'George', 'Ringo', 'John'];
console.log("List");
console.log(list);
let x = list.filter((v,i) => list.indexOf(v) === i)
console.log("Remove duplicates array");
console.log(x);
}
function loadDoc2() {
const list = [{ name: 'John', value: 'Ringo'}, { name: 'John', value: "Ringo"}, { name: 'Anotnio', value: "as3a123s"}, { name: 'Anotnio', value: "asda4s"}];
console.log("List");
console.log(list);
var x = Array.from(new Set(list.map(JSON.stringify))).map(JSON.parse);
console.log("Remove duplicates array of objects");
console.log(x)
}
</script>
</body>
</html>
ES6 Typescript Remove Duplicates from an Array
2018 Typescript
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" }
];
public 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')
Remove duplicates array of objects
2018 Typescript
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" } ];public 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')
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