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

Pretty good solution. Just keeping here for future use :)

const sortBy = (array, values, key = 'id') => ((map) => values.reduce((a,i) => 
a.push(map[i]) && a,[]))(array.reduce((a,i) => (a[i[key]] = i) && a, {}));

Usage

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

sortBy(b, a) // [{id: 2}, {id: 3}, {id: 1}, {id:` 4}]