'use strict';
  
  Object.defineProperty(exports, "__esModule", {
      value: true
  });
  exports.default = race;
  
  var _isArray = require('lodash/isArray');
  
  var _isArray2 = _interopRequireDefault(_isArray);
  
  var _noop = require('lodash/noop');
  
  var _noop2 = _interopRequireDefault(_noop);
  
  var _once = require('./internal/once');
  
  var _once2 = _interopRequireDefault(_once);
  
  var _wrapAsync = require('./internal/wrapAsync');
  
  var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  
  /**
   * Runs the `tasks` array of functions in parallel, without waiting until the
   * previous function has completed. Once any of the `tasks` complete or pass an
   * error to its callback, the main `callback` is immediately called. It's
   * equivalent to `Promise.race()`.
   *
   * @name race
   * @static
   * @memberOf module:ControlFlow
   * @method
   * @category Control Flow
   * @param {Array} tasks - An array containing [async functions]{@link AsyncFunction}
   * to run. Each function can complete with an optional `result` value.
   * @param {Function} callback - A callback to run once any of the functions have
   * completed. This function gets an error or result from the first function that
   * completed. Invoked with (err, result).
   * @returns undefined
   * @example
   *
   * async.race([
   *     function(callback) {
   *         setTimeout(function() {
   *             callback(null, 'one');
   *         }, 200);
   *     },
   *     function(callback) {
   *         setTimeout(function() {
   *             callback(null, 'two');
   *         }, 100);
   *     }
   * ],
   * // main callback
   * function(err, result) {
   *     // the result will be equal to 'two' as it finishes earlier
   * });
   */
  function race(tasks, callback) {
      callback = (0, _once2.default)(callback || _noop2.default);
      if (!(0, _isArray2.default)(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));
      if (!tasks.length) return callback();
      for (var i = 0, l = tasks.length; i < l; i++) {
          (0, _wrapAsync2.default)(tasks[i])(callback);
      }
  }
  module.exports = exports['default'];