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Diffstat (limited to 'node_modules/async/each.js')
| -rw-r--r-- | node_modules/async/each.js | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/node_modules/async/each.js b/node_modules/async/each.js new file mode 100644 index 0000000..405d495 --- /dev/null +++ b/node_modules/async/each.js @@ -0,0 +1,129 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); + +var _eachOf = require('./eachOf.js'); + +var _eachOf2 = _interopRequireDefault(_eachOf); + +var _withoutIndex = require('./internal/withoutIndex.js'); + +var _withoutIndex2 = _interopRequireDefault(_withoutIndex); + +var _wrapAsync = require('./internal/wrapAsync.js'); + +var _wrapAsync2 = _interopRequireDefault(_wrapAsync); + +var _awaitify = require('./internal/awaitify.js'); + +var _awaitify2 = _interopRequireDefault(_awaitify); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * Applies the function `iteratee` to each item in `coll`, in parallel. + * The `iteratee` is called with an item from the list, and a callback for when + * it has finished. If the `iteratee` passes an error to its `callback`, the + * main `callback` (for the `each` function) is immediately called with the + * error. + * + * Note, that since this function applies `iteratee` to each item in parallel, + * there is no guarantee that the iteratee functions will complete in order. + * + * @name each + * @static + * @memberOf module:Collections + * @method + * @alias forEach + * @category Collection + * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over. + * @param {AsyncFunction} iteratee - An async function to apply to + * each item in `coll`. Invoked with (item, callback). + * The array index is not passed to the iteratee. + * If you need the index, use `eachOf`. + * @param {Function} [callback] - A callback which is called when all + * `iteratee` functions have finished, or an error occurs. Invoked with (err). + * @returns {Promise} a promise, if a callback is omitted + * @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 + * // dir4 does not exist + * + * const fileList = [ 'dir1/file2.txt', 'dir2/file3.txt', 'dir/file5.txt']; + * const withMissingFileList = ['dir1/file1.txt', 'dir4/file2.txt']; + * + * // asynchronous function that deletes a file + * const deleteFile = function(file, callback) { + * fs.unlink(file, callback); + * }; + * + * // Using callbacks + * async.each(fileList, deleteFile, function(err) { + * if( err ) { + * console.log(err); + * } else { + * console.log('All files have been deleted successfully'); + * } + * }); + * + * // Error Handling + * async.each(withMissingFileList, deleteFile, function(err){ + * console.log(err); + * // [ Error: ENOENT: no such file or directory ] + * // since dir4/file2.txt does not exist + * // dir1/file1.txt could have been deleted + * }); + * + * // Using Promises + * async.each(fileList, deleteFile) + * .then( () => { + * console.log('All files have been deleted successfully'); + * }).catch( err => { + * console.log(err); + * }); + * + * // Error Handling + * async.each(fileList, deleteFile) + * .then( () => { + * console.log('All files have been deleted successfully'); + * }).catch( err => { + * console.log(err); + * // [ Error: ENOENT: no such file or directory ] + * // since dir4/file2.txt does not exist + * // dir1/file1.txt could have been deleted + * }); + * + * // Using async/await + * async () => { + * try { + * await async.each(files, deleteFile); + * } + * catch (err) { + * console.log(err); + * } + * } + * + * // Error Handling + * async () => { + * try { + * await async.each(withMissingFileList, deleteFile); + * } + * catch (err) { + * console.log(err); + * // [ Error: ENOENT: no such file or directory ] + * // since dir4/file2.txt does not exist + * // dir1/file1.txt could have been deleted + * } + * } + * + */ +function eachLimit(coll, iteratee, callback) { + return (0, _eachOf2.default)(coll, (0, _withoutIndex2.default)((0, _wrapAsync2.default)(iteratee)), callback); +} + +exports.default = (0, _awaitify2.default)(eachLimit, 3); +module.exports = exports['default'];
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