mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-25 17:45:03 +03:00
Aaron Vaage
6a8a985f8b
Allow us to use ES6 sets and maps. The only patform that does not fully support sets and maps is IE11, but closure provided a polyfill. Change-Id: I891714434101281a4b35434b90c35a5cd19f3d92
127 lines
2.8 KiB
JavaScript
127 lines
2.8 KiB
JavaScript
/**
|
|
* @license
|
|
* Copyright 2016 Google Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
goog.provide('shaka.util.MapUtils');
|
|
|
|
|
|
/**
|
|
* @namespace shaka.util.MapUtils
|
|
* @summary A set of map/object utility functions.
|
|
*/
|
|
|
|
|
|
/**
|
|
* Returns true if the map is empty; otherwise, returns false.
|
|
*
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @return {boolean}
|
|
* @template KEY,VALUE
|
|
*/
|
|
shaka.util.MapUtils.empty = function(object) {
|
|
return !object || Object.keys(object).length == 0;
|
|
};
|
|
|
|
|
|
/**
|
|
* Gets the map's values.
|
|
*
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @return {!Array.<VALUE>}
|
|
* @template KEY,VALUE
|
|
*/
|
|
shaka.util.MapUtils.values = function(object) {
|
|
return Object.keys(object).map(function(key) { return object[key]; });
|
|
};
|
|
|
|
|
|
/**
|
|
* Converts the values in the given Map to a different value.
|
|
*
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @param {function(VALUE, KEY=):OUTPUT} callback
|
|
* @return {!Object.<KEY, OUTPUT>}
|
|
* @template KEY,VALUE,OUTPUT
|
|
*/
|
|
shaka.util.MapUtils.map = function(object, callback) {
|
|
return Object.keys(object).reduce(function(ret, key) {
|
|
let value = object[key];
|
|
ret[key] = callback(value, key);
|
|
return ret;
|
|
}, {});
|
|
};
|
|
|
|
|
|
/**
|
|
* Returns true if every entry matches the predicate.
|
|
*
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @param {function(KEY, VALUE):boolean} callback
|
|
* @return {boolean}
|
|
* @template KEY,VALUE
|
|
*/
|
|
shaka.util.MapUtils.every = function(object, callback) {
|
|
return Object.keys(object).every(function(key) {
|
|
return callback(key, object[key]);
|
|
});
|
|
};
|
|
|
|
|
|
/**
|
|
* Invokes the callback for each entry in the map.
|
|
*
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @param {function(KEY, VALUE)} callback
|
|
* @template KEY,VALUE
|
|
*/
|
|
shaka.util.MapUtils.forEach = function(object, callback) {
|
|
Object.keys(object).forEach(function(key) {
|
|
callback(key, object[key]);
|
|
});
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {!Object.<KEY, VALUE>} object
|
|
* @return {!Map.<KEY, VALUE>}
|
|
* @template KEY,VALUE
|
|
* @private
|
|
*/
|
|
shaka.util.MapUtils.asMap_ = function(object) {
|
|
const map = new Map();
|
|
Object.keys(object).forEach((key) => {
|
|
map.set(key, object[key]);
|
|
});
|
|
|
|
return map;
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {!Map.<KEY, VALUE>} map
|
|
* @return {!Object.<KEY, VALUE>}
|
|
* @template KEY,VALUE
|
|
* @private
|
|
*/
|
|
shaka.util.MapUtils.asObject_ = function(map) {
|
|
const obj = {};
|
|
map.forEach((value, key) => {
|
|
obj[key] = value;
|
|
});
|
|
|
|
return obj;
|
|
};
|