Sort an array of objects based on another array of ids

Question

I have 2 arrays

a = [2,3,1,4]
b = [{id: 1}, {id: 2}, {id: 3}, {id: 4}]

How do I get b sorted based on a? My desir

Answer 1

Plain javascript, using some methods of the Array (ES2015 standard)

var a = [2,3,1,4];
var b = [{id: 1}, {id: 2}, {id: 3}, {id: 4}];
var c = [];

a.forEach(el => c.push(b.find(e => e.id == el)));

document.write(JSON.stringify(c, 0, 2));