javascript - Merge two array of object and sort on the value

Question

const a=[{id:1},{id:5},{id:7},{id:6}]
const b=[{id:7},{id:2},{id:5},{id:9}]

//Merge and sort in single array of object based on unique value

Answer 1

You could use Map Object.

const a = [{ id: 1 }, { id: 5 }, { id: 7 }, { id: 6 }];
const b = [{ id: 7 }, { id: 2 }, { id: 5 }, { id: 9 }];
const map = new Map();
a.forEach((x) => map.set(x.id, { ...x }));
b.forEach((x) => map.set(x.id, { ...x }));
const ret = [...map.values()].sort((x, y) => x.id - y.id);
console.log(ret);