How to do equivalent of LINQ SelectMany() just in javascript

Question

Unfortunately, I don\'t have JQuery or Underscore, just pure javascript (IE9 compatible).

I\'m wanting the equivalent of SelectMany() from LINQ functionality.

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Answer 1

For those a while later, understanding javascript but still want a simple Typed SelectMany method in Typescript:

function selectMany(input: TIn[], selectListFn: (t: TIn) => TOut[]): TOut[] {
  return input.reduce((out, inx) => {
    out.push(...selectListFn(inx));
    return out;
  }, new Array());
}