Lodash sort collection based on external array

Question

I have an array with keys like so:

[\'asdf12\',\'39342aa\',\'12399\',\'129asg\',...] 

and a collection which has these keys in each object

Answer 1

This is the efficient & clean way:

(Import lodash identity and sortBy):

TS:

function sortByArray({ source, by, sourceTransformer = identity }: { source: T[]; by: U[]; sourceTransformer?: (item: T) => U }) {
  const indexesByElements = new Map(by.map((item, idx) => [item, idx]));
  const orderedResult = sortBy(source, (p) => indexesByElements.get(sourceTransformer(p)));
  return orderedResult;
}

Or in JS:

function sortByArray({ source, by, sourceTransformer = _.identity }) {
    const indexesByElements = new Map(by.map((item, idx) => [item, idx]));
    const orderedResult = _.sortBy(source, (p) => indexesByElements.get(sourceTransformer(p)));
    return orderedResult;
}