tiny-map-async

Asynchronous version of map that is similar to async.map, but has extra goodies included: concurrency limit and optional index param for the iterator function.

Usage

map(array, [limit], iterator, [callback])

Arguments:

• array - An array of items to iterate through.
• [limit] - An (optional) integer for determining how many iterator functions should be run in parallel.
• iterator(item, [index], callback) - A function to be applied to each item in the array. When it has finished processing then the callback function should be called with (error, result).
• callback(err) - An optional callback function that gets called when either all iterator functions have finished or one of them has returned an error.

Example

var path = require('path');
var fs = require('fs');
var mapAsync = require('tiny-map-async');

var root = path.resolve(__dirname, '../');
// get an array of files inside root
var files = fs.readdirSync(root).map(function getFullPath(filename) {
  return path.resolve(root, filename);
});

mapAsync(files, fs.stat, function(err, results) {
  // results is now an array of stats for each file
  if (err) { throw err; }

  results.forEach(function(res, index) {
    console.log('\n' + files[index] + ': \n', res);
  });
});

Tests

npm test

License

MIT