snowyu/promise-sequence.js

var promiseReduce = Promise.reduce || require('./reduce').default;
// var Promise   = require('any-promise');

// var isArray   = Array.isArray;

/*
 @param aList {Array} each item as argument pass to the task.
 @param task {Promise} promise of task function
*/

function any(aList, task){
  function _genReduceFn(fn) {
    return function (previous, item){
      if (previous == null) {
        previous = fn ? Promise.resolve(item).then(function(item){return fn(item)}) : item;
      }
      return previous;
    };
  }

  return promiseReduce(aList, _genReduceFn(task), null);
};

module.exports = any
module.exports.default = any