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node_modules/async/detect.js 2.16 KB
f7563de62   Palak Handa   first commit
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  'use strict';
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  
  var _identity = require('lodash/identity');
  
  var _identity2 = _interopRequireDefault(_identity);
  
  var _createTester = require('./internal/createTester');
  
  var _createTester2 = _interopRequireDefault(_createTester);
  
  var _doParallel = require('./internal/doParallel');
  
  var _doParallel2 = _interopRequireDefault(_doParallel);
  
  var _findGetResult = require('./internal/findGetResult');
  
  var _findGetResult2 = _interopRequireDefault(_findGetResult);
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  
  /**
   * Returns the first value in `coll` that passes an async truth test. The
   * `iteratee` is applied in parallel, meaning the first iteratee to return
   * `true` will fire the detect `callback` with that result. That means the
   * result might not be the first item in the original `coll` (in terms of order)
   * that passes the test.
  
   * If order within the original `coll` is important, then look at
   * [`detectSeries`]{@link module:Collections.detectSeries}.
   *
   * @name detect
   * @static
   * @memberOf module:Collections
   * @method
   * @alias find
   * @category Collections
   * @param {Array|Iterable|Object} coll - A collection to iterate over.
   * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.
   * The iteratee must complete with a boolean value as its result.
   * Invoked with (item, callback).
   * @param {Function} [callback] - A callback which is called as soon as any
   * iteratee returns `true`, or after all the `iteratee` functions have finished.
   * Result will be the first item in the array that passes the truth test
   * (iteratee) or the value `undefined` if none passed. Invoked with
   * (err, result).
   * @example
   *
   * async.detect(['file1','file2','file3'], function(filePath, callback) {
   *     fs.access(filePath, function(err) {
   *         callback(null, !err)
   *     });
   * }, function(err, result) {
   *     // result now equals the first file in the list that exists
   * });
   */
  exports.default = (0, _doParallel2.default)((0, _createTester2.default)(_identity2.default, _findGetResult2.default));
  module.exports = exports['default'];