applyEach should surface results from the input functions

[hhowe29]

I could utilize applyEach more often if it provided a way to collect results from each input function. Please allow me to write code link this:

async.applyEach([func0, func1, ... funcN], 'foo', 29, (error, results) => {
   if(error) {
     console.log('guess you are out of luck');
   }   
  else {
    // results == array of N+1 result values
    console.log('func0(foo, 29) returned ' + results[0]);
    console.log('func1(foo, 29) returned ' + results[1]);
    ...
  }
});

This is similar map, but inverted from SIMD to MISD.

[hargasinski]

Hi @hhowe29,

Thanks for the question! applyEach behaves the same way as map in this regard (it's actually implemented using map internally) so you can already do that. The documentation for it is just missing right now.

const func0 = (foo, bar, cb) => { cb(null, 'foo'); };
const func1 = (foo, bar, cb) => { cb(null, 'bar'); };

async.applyEach([func0, func1], 'foo', 29, (err, results) => {
  if (err) {
    // handle err
  }
  // results is ['foo', 'bar']
});

If you have an idea for including this in the docs, a PR would be awesome!