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reject.js

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  • reject.js 2.61 KiB
    'use strict';
    
    Object.defineProperty(exports, "__esModule", {
        value: true
    });
    
    var _reject2 = require('./internal/reject.js');
    
    var _reject3 = _interopRequireDefault(_reject2);
    
    var _eachOf = require('./eachOf.js');
    
    var _eachOf2 = _interopRequireDefault(_eachOf);
    
    var _awaitify = require('./internal/awaitify.js');
    
    var _awaitify2 = _interopRequireDefault(_awaitify);
    
    function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
    
    /**
     * The opposite of [`filter`]{@link module:Collections.filter}. Removes values that pass an `async` truth test.
     *
     * @name reject
     * @static
     * @memberOf module:Collections
     * @method
     * @see [async.filter]{@link module:Collections.filter}
     * @category Collection
     * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
     * @param {Function} iteratee - An async truth test to apply to each item in
     * `coll`.
     * The should complete with a boolean value as its `result`.
     * Invoked with (item, callback).
     * @param {Function} [callback] - A callback which is called after all the
     * `iteratee` functions have finished. Invoked with (err, results).
     * @returns {Promise} a promise, if no callback is passed
     * @example
     *
     * // dir1 is a directory that contains file1.txt, file2.txt
     * // dir2 is a directory that contains file3.txt, file4.txt
     * // dir3 is a directory that contains file5.txt
     *
     * const fileList = ['dir1/file1.txt','dir2/file3.txt','dir3/file6.txt'];
     *
     * // asynchronous function that checks if a file exists
     * function fileExists(file, callback) {
     *    fs.access(file, fs.constants.F_OK, (err) => {
     *        callback(null, !err);
     *    });
     * }
     *
     * // Using callbacks
     * async.reject(fileList, fileExists, function(err, results) {
     *    // [ 'dir3/file6.txt' ]
     *    // results now equals an array of the non-existing files
     * });
     *
     * // Using Promises
     * async.reject(fileList, fileExists)
     * .then( results => {
     *     console.log(results);
     *     // [ 'dir3/file6.txt' ]
     *     // results now equals an array of the non-existing files
     * }).catch( err => {
     *     console.log(err);
     * });
     *
     * // Using async/await
     * async () => {