我写的是:
function save(mosn, cause){
var map = new Object(); (1)
var map1 = new Object(); (2)
map.put(mosn, cause); (3)
for(var p in map){
....
}
}
1.(1)(2)这两句是new Object(),还是new HashMap()?
2.(3)这样写可以吗?
objecthashmapfunction
function save(mosn, cause){
var map = new Object(); (1)
var map1 = new Object(); (2)
map.put(mosn, cause); (3)
for(var p in map){
....
}
}
1.(1)(2)这两句是new Object(),还是new HashMap()?
2.(3)这样写可以吗?
objecthashmapfunction
也可以
var map = {};
{} 是 new Object() 的字面量3 这样写
map[mosn] = cause
function HashMap(){
this.map = {};
}
HashMap.prototype = {
put : function(key , value){
this.map[key] = value;
},
get : function(key){
if(this.map.hasOwnProperty(key)){
return this.map[key];
}
return null;
},
remove : function(key){
if(this.map.hasOwnProperty(key)){
return delete this.map[key];
}
return false;
},
removeAll : function(){
this.map = {};
},
keySet : function(){
var _keys = [];
for(var i in this.map){
_keys.push(i);
}
return _keys;
}
};
HashMap.prototype.constructor = HashMap;
var hashMap = new HashMap();
hashMap.put('key' ,'value');
hashMap.put('key1' ,'value');
console.log(hashMap.get('key'));
console.log(hashMap.keySet());
console.log(hashMap.remove('key'));
console.log(hashMap.keySet());
var a=[];
赋值
a[key]=value;
删除
delete a[key]
遍历用
for(var i in a){
alert(a[i]);
}
取值
a[key]
map[mosn] = cause//赋值
console.log(map[mosn])//取值
就ok了
function Map() {
var struct = function(key, value) {
this.key = key;
this.value = value;
}; var put = function(key, value) {
for ( var i = 0; i < this.arr.length; i++) {
if (this.arr[i].key === key) {
this.arr[i].value = value;
return;
}
}
this.arr[this.arr.length] = new struct(key, value);
};
var get = function(key) {
for ( var i = 0; i < this.arr.length; i++) {
if (this.arr[i].key === key) {
return this.arr[i].value;
}
}
return null;
}; var remove = function(key) {
var v;
for ( var i = 0; i < this.arr.length; i++) {
v = this.arr.pop();
if (v.key === key) {
continue;
}
this.arr.unshift(v);
}
}; var size = function() {
return this.arr.length;
}; var isEmpty = function() {
return this.arr.length <= 0;
}; this.arr = new Array();
this.get = get;
this.put = put;
this.remove = remove;
this.size = size;
this.isEmpty = isEmpty;
}