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authorMinteck <contact@minteck.org>2022-11-28 17:14:38 +0100
committerMinteck <contact@minteck.org>2022-11-28 17:14:38 +0100
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treeaea01bf3506dda706719fc68eb37b77ed9ef3fe8 /node_modules/async/sortBy.js
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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+
+var _map = require('./map.js');
+
+var _map2 = _interopRequireDefault(_map);
+
+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 }; }
+
+/**
+ * Sorts a list by the results of running each `coll` value through an async
+ * `iteratee`.
+ *
+ * @name sortBy
+ * @static
+ * @memberOf module:Collections
+ * @method
+ * @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`.
+ * The iteratee should complete with a value to use as the sort criteria as
+ * its `result`.
+ * Invoked with (item, callback).
+ * @param {Function} callback - A callback which is called after all the
+ * `iteratee` functions have finished, or an error occurs. Results is the items
+ * from the original `coll` sorted by the values returned by the `iteratee`
+ * calls. Invoked with (err, results).
+ * @returns {Promise} a promise, if no callback passed
+ * @example
+ *
+ * // bigfile.txt is a file that is 251100 bytes in size
+ * // mediumfile.txt is a file that is 11000 bytes in size
+ * // smallfile.txt is a file that is 121 bytes in size
+ *
+ * // asynchronous function that returns the file size in bytes
+ * function getFileSizeInBytes(file, callback) {
+ * fs.stat(file, function(err, stat) {
+ * if (err) {
+ * return callback(err);
+ * }
+ * callback(null, stat.size);
+ * });
+ * }
+ *
+ * // Using callbacks
+ * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], getFileSizeInBytes,
+ * function(err, results) {
+ * if (err) {
+ * console.log(err);
+ * } else {
+ * console.log(results);
+ * // results is now the original array of files sorted by
+ * // file size (ascending by default), e.g.
+ * // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+ * }
+ * }
+ * );
+ *
+ * // By modifying the callback parameter the
+ * // sorting order can be influenced:
+ *
+ * // ascending order
+ * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], function(file, callback) {
+ * getFileSizeInBytes(file, function(getFileSizeErr, fileSize) {
+ * if (getFileSizeErr) return callback(getFileSizeErr);
+ * callback(null, fileSize);
+ * });
+ * }, function(err, results) {
+ * if (err) {
+ * console.log(err);
+ * } else {
+ * console.log(results);
+ * // results is now the original array of files sorted by
+ * // file size (ascending by default), e.g.
+ * // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+ * }
+ * }
+ * );
+ *
+ * // descending order
+ * async.sortBy(['bigfile.txt','mediumfile.txt','smallfile.txt'], function(file, callback) {
+ * getFileSizeInBytes(file, function(getFileSizeErr, fileSize) {
+ * if (getFileSizeErr) {
+ * return callback(getFileSizeErr);
+ * }
+ * callback(null, fileSize * -1);
+ * });
+ * }, function(err, results) {
+ * if (err) {
+ * console.log(err);
+ * } else {
+ * console.log(results);
+ * // results is now the original array of files sorted by
+ * // file size (ascending by default), e.g.
+ * // [ 'bigfile.txt', 'mediumfile.txt', 'smallfile.txt']
+ * }
+ * }
+ * );
+ *
+ * // Error handling
+ * async.sortBy(['mediumfile.txt','smallfile.txt','missingfile.txt'], getFileSizeInBytes,
+ * function(err, results) {
+ * if (err) {
+ * console.log(err);
+ * // [ Error: ENOENT: no such file or directory ]
+ * } else {
+ * console.log(results);
+ * }
+ * }
+ * );
+ *
+ * // Using Promises
+ * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], getFileSizeInBytes)
+ * .then( results => {
+ * console.log(results);
+ * // results is now the original array of files sorted by
+ * // file size (ascending by default), e.g.
+ * // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+ * }).catch( err => {
+ * console.log(err);
+ * });
+ *
+ * // Error handling
+ * async.sortBy(['mediumfile.txt','smallfile.txt','missingfile.txt'], getFileSizeInBytes)
+ * .then( results => {
+ * console.log(results);
+ * }).catch( err => {
+ * console.log(err);
+ * // [ Error: ENOENT: no such file or directory ]
+ * });
+ *
+ * // Using async/await
+ * (async () => {
+ * try {
+ * let results = await async.sortBy(['bigfile.txt','mediumfile.txt','smallfile.txt'], getFileSizeInBytes);
+ * console.log(results);
+ * // results is now the original array of files sorted by
+ * // file size (ascending by default), e.g.
+ * // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+ * }
+ * catch (err) {
+ * console.log(err);
+ * }
+ * })();
+ *
+ * // Error handling
+ * async () => {
+ * try {
+ * let results = await async.sortBy(['missingfile.txt','mediumfile.txt','smallfile.txt'], getFileSizeInBytes);
+ * console.log(results);
+ * }
+ * catch (err) {
+ * console.log(err);
+ * // [ Error: ENOENT: no such file or directory ]
+ * }
+ * }
+ *
+ */
+function sortBy(coll, iteratee, callback) {
+ var _iteratee = (0, _wrapAsync2.default)(iteratee);
+ return (0, _map2.default)(coll, (x, iterCb) => {
+ _iteratee(x, (err, criteria) => {
+ if (err) return iterCb(err);
+ iterCb(err, { value: x, criteria });
+ });
+ }, (err, results) => {
+ if (err) return callback(err);
+ callback(null, results.sort(comparator).map(v => v.value));
+ });
+
+ function comparator(left, right) {
+ var a = left.criteria,
+ b = right.criteria;
+ return a < b ? -1 : a > b ? 1 : 0;
+ }
+}
+exports.default = (0, _awaitify2.default)(sortBy, 3);
+module.exports = exports['default']; \ No newline at end of file