* Make a map like java.
* You can use this map like this :
* var myMap = new Map();
* myMap.put("key","value");
* var key = myMap.get("key");
*/
function Map() {? ?

??? this.elements = new Array();? ?

??? this.size = function() {
??????? return this.elements.length;
??? }? ?

??? this.isEmpty = function() {
??????? return (this.elements.length < 1);
??? }? ?

??? this.clear = function() {
??????? this.elements = new Array();
??? }? ?

??? this.put = function(_key, _value) {
??????? this.elements.push({key:_key, value:_value});
??? }? ?

??? this.remove = function(_key) {
??????? var bln = false;? ?

??????? try {
??????????? for (i = 0; i < this.elements.length; i++) {
??????????????? if (this.elements[i].key == _key) {
??????????????????? this.elements.splice(i, 1);
??????????????????? return true;
??????????????? }
??????????? }
??????? } catch(e) {
??????????? bln = false;
??????? }
??????? return bln;
??? }? ?

??? this.get = function(_key) {
??????? try{
??????????? for (i = 0; i < this.elements.length; i++) {
??????????????? if (this.elements[i].key == _key) {
??????????????????? return this.elements[i].value;
??????????????? }
??????????? }
??????? }catch(e) {
??????????? return null;
??????? }
??? }? ?

??? this.element = function(_index) {
??????? if (_index < 0 || _index >= this.elements.length) {
??????????? return null;
??????? }
??????? return this.elements[_index];
??? }? ?

??? this.containsKey = function(_key) {
??????? var bln = false;
??????? try {
??????????? for (i = 0; i < this.elements.length; i++) {
??????????????? if (this.elements[i].key == _key) {
??????????????????? bln = true;
??????????????? }
??????????? }
??????? }catch(e) {
??????????? bln = false;
??????? }
??????? return bln;
??? }? ?

??? this.containsValue = function(_value) {
??????? var bln = false;
??????? try {
??????????? for (i = 0; i < this.elements.length; i++) {
??????????????? if (this.elements[i].value == _value){
??????????????????? bln = true;
??????????????? }
??????????? }
??????? } catch(e) {
??????????? bln = false;
??????? }
??????? return bln;
??? }? ?

??? this.values = function() {
??????? var arr = new Array();
??????? for (i = 0; i < this.elements.length; i++) {
??????????? arr.push(this.elements[i].value);
??????? }
??????? return arr;
??? }? ?

??? this.keys = function() {
??????? var arr = new Array();
??????? for (i = 0; i < this.elements.length; i++) {
??????????? arr.push(this.elements[i].key);
??????? }
??????? return arr;
??? }
}

?