masteringModule/node_modules/asynckit/lib/readable_parallel.js

var parallel = require('../parallel.js');

// API
module.exports = ReadableParallel;

/**
 * Streaming wrapper to `asynckit.parallel`
 *
 * @param   {array|object} list - array or object (named list) to iterate over
 * @param   {function} iterator - iterator to run
 * @param   {function} callback - invoked when all elements processed
 * @returns {stream.Readable#}
 */
function ReadableParallel(list, iterator, callback)
{
  if (!(this instanceof ReadableParallel))
  {
    return new ReadableParallel(list, iterator, callback);
  }

  // turn on object mode
  ReadableParallel.super_.call(this, {objectMode: true});

  this._start(parallel, list, iterator, callback);
}