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110 lines
3.1 KiB
110 lines
3.1 KiB
/**
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* @fileoverview
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* Implements the ExMap (Extended Map) object.
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* @author NHN.
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* FE Development Lab <dl_javascript@nhn.com>
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*/
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'use strict';
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var collection = require('./collection');
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var Map = require('./map');
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// Caching tui.util for performance enhancing
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var mapAPIsForRead = ['get', 'has', 'forEach', 'keys', 'values', 'entries'];
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var mapAPIsForDelete = ['delete', 'clear'];
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/**
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* The ExMap object is Extended Version of the tui.util.Map object.<br>
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* and added some useful feature to make it easy to manage the Map object.
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* @constructor
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* @param {Array} initData - Array of key-value pairs (2-element Arrays).
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* Each key-value pair will be added to the new Map
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* @memberof tui.util
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* @example
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* // node, commonjs
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* var ExMap = require('tui-code-snippet').ExMap;
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* @example
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* // distribution file, script
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* <script src='path-to/tui-code-snippt.js'></script>
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* <script>
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* var ExMap = tui.util.ExMap;
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* <script>
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*/
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function ExMap(initData) {
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this._map = new Map(initData);
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this.size = this._map.size;
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}
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collection.forEachArray(mapAPIsForRead, function(name) {
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ExMap.prototype[name] = function() {
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return this._map[name].apply(this._map, arguments);
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};
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});
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collection.forEachArray(mapAPIsForDelete, function(name) {
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ExMap.prototype[name] = function() {
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var result = this._map[name].apply(this._map, arguments);
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this.size = this._map.size;
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return result;
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};
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});
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ExMap.prototype.set = function() {
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this._map.set.apply(this._map, arguments);
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this.size = this._map.size;
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return this;
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};
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/**
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* Sets all of the key-value pairs in the specified object to the Map object.
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* @param {Object} object - Plain object that has a key-value pair
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*/
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ExMap.prototype.setObject = function(object) {
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collection.forEachOwnProperties(object, function(value, key) {
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this.set(key, value);
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}, this);
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};
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/**
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* Removes the elements associated with keys in the specified array.
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* @param {Array} keys - Array that contains keys of the element to remove
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*/
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ExMap.prototype.deleteByKeys = function(keys) {
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collection.forEachArray(keys, function(key) {
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this['delete'](key);
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}, this);
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};
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/**
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* Sets all of the key-value pairs in the specified Map object to this Map object.
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* @param {Map} map - Map object to be merged into this Map object
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*/
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ExMap.prototype.merge = function(map) {
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map.forEach(function(value, key) {
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this.set(key, value);
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}, this);
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};
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/**
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* Looks through each key-value pair in the map and returns the new ExMap object of
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* all key-value pairs that pass a truth test implemented by the provided function.
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* @param {function} predicate - Function to test each key-value pair of the Map object.<br>
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* Invoked with arguments (value, key). Return true to keep the element, false otherwise.
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* @returns {ExMap} A new ExMap object
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*/
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ExMap.prototype.filter = function(predicate) {
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var filtered = new ExMap();
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this.forEach(function(value, key) {
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if (predicate(value, key)) {
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filtered.set(key, value);
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}
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});
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return filtered;
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};
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module.exports = ExMap;
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