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node_modules/when/sequence.js 1.19 KB
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  /** @license MIT License (c) copyright 2011-2013 original author or authors */
  
  /**
   * sequence.js
   *
   * Run a set of task functions in sequence.  All tasks will
   * receive the same args.
   *
   * @author Brian Cavalier
   * @author John Hann
   */
  
  (function(define) {
  define(function(require) {
  
  	var when = require('./when');
  	var all = when.Promise.all;
  	var slice = Array.prototype.slice;
  
  	/**
  	 * Run array of tasks in sequence with no overlap
  	 * @param tasks {Array|Promise} array or promiseForArray of task functions
  	 * @param [args] {*} arguments to be passed to all tasks
  	 * @return {Promise} promise for an array containing
  	 * the result of each task in the array position corresponding
  	 * to position of the task in the tasks array
  	 */
  	return function sequence(tasks /*, args... */) {
  		var results = [];
  
  		return all(slice.call(arguments, 1)).then(function(args) {
  			return when.reduce(tasks, function(results, task) {
  				return when(task.apply(void 0, args), addResult);
  			}, results);
  		});
  
  		function addResult(result) {
  			results.push(result);
  			return results;
  		}
  	};
  
  });
  })(typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory(require); });