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TypeScript 2021-10-10 07:10:04
group objects in javascript
function groupBy(arr, prop) { const map = new Map(Array.from(arr, obj => [obj[prop], []])); arr.forEach(obj => map.get(obj[prop]).push(obj)); return Array.from(map.values()); } const data = [{ name: "Display", group: "Tec... Add solution -
Javascript 2021-09-29 14:37:03
node map has value
let myMap = new Map(); myMap.set("key1", "value1"); myMap.set("key2", "value2"); console.log(myMap.has("key1")); // true console.log(myMap.has("key2")); // true console.log(myMap.get("key... Add solution -
Javascript 2021-09-13 12:18:02
Removing duplicates in an Array of Objects
let person = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}]; function removeDuplicates(data, key) { return [ ...new Map(data.map(item => [key(item), item])).values() ] }; console... Add solution -
Javascript 2021-09-13 07:14:02
remove duplicate objects from array javascript
let person = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}]; function removeDuplicates(data, key) { return [ ...new Map(data.map(item => [key(item), item])).values() ] }; console... Add solution
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