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JavaScript仿Java实现Map
var Map = function() { this.elements = new Array(); this.size = function() { return this.elements.length; } this.isEmpty = function() { return (this.elements.length < 1); } this.clear = function() { this.elements.length = 0; } this.put = function(_key, _value) { if(!this.containsKey(_key)){ this.elements.push ( { key : _key, value : _value }); }else{ this.remove(_key); this.put(_key,_value); } } this.remove = function(_key) { try { for ( var i = 0; i < this.size(); i++) { if (this.elements[i].key == _key){ this.elements.splice(i, 1); return true; } } } catch (e) { return false; } return false; } this.get = function(_key) { try { for ( var i = 0; i < this.size(); i++) { if (this.elements[i].key == _key) { var _value = this.elements[i].value; return _value; } } } catch (e) { return null; } return null; } this.containsKey = function(_key){ try { for ( var i = 0; i < this.size(); i++) { if (this.elements[i].key == _key) { return true; } } } catch (e) { return false; } return false; } this.getValues = function(){ var values=new Array(); try { for ( var i = 0; i < this.size(); i++) { values.push(this.elements[i].key); } } catch (e) { alert("Can not get Map Values ! {1}"+e.message); return null; } return values; } this.getKeys = function(){ var keys=new Array(); try { for ( var i = 0; i < this.size(); i++) { keys.push(this.elements[i].values); } } catch (e) { //alert("Can not get Map Keys ! {1}"+e.message); return null; } return keys; } this.mapStr = function(){ return this.elements.toString(); } }
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