Files
shaka-player/lib/util/array_utils.js
T
Joey Parrish 4cc4e96dbd Overhaul license comments and file annotations
* Updates all Copyright years to 2015.
* Adds licenses annotations to all JS.
* Makes all licenses identical to avoid repeated appearance in the
  compiled output.
* Drops fileoverview annotations, which do not affect docs output.
* The linter still requires fileoverview on externs.

This patch required a newer closure compiler, since the previous
version we used had a bug regarding license annotations that caused
the license comment block to appear in the output once per file
regardless of uniqueness.

Change-Id: I2e9272db680cba7ecc4613d97f1d3a94ac2244cc
2015-09-08 12:02:34 -07:00

50 lines
1.4 KiB
JavaScript

/**
* @license
* Copyright 2015 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.ArrayUtils');
/**
* @namespace shaka.util.ArrayUtils
* @summary Array utility functions.
*/
/**
* Remove duplicate entries from an array.
* @param {!Array.<T>} array
* @param {function(T): (string|number)=} opt_keyFn An optional function which
* takes an array item and converts it into a key. Use this if your array
* items cannot be used as an index into an Object.
* @return {!Array.<T>} A sorted list of the keys.
* @template T
*/
shaka.util.ArrayUtils.removeDuplicates = function(array, opt_keyFn) {
var set = {};
for (var i = 0; i < array.length; ++i) {
var key = opt_keyFn ? opt_keyFn(array[i]) : array[i].toString();
set[key] = array[i];
}
var result = [];
for (var k in set) {
result.push(set[k]);
}
return result;
};