Javascript: hash tables in javascript

/**
 * Copyright 2010 Tim Down.
 *
 * 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
 *    源碼下載：  http://code.google.com/p/jshashtable/
http://www.timdown.co.uk/jshashtable/

 * 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.
 */
var Hashtable=(function(){var p="function";var n=(typeof Array.prototype.splice==p)?function(s,r){s.splice(r,1)}:function(u,t){var s,v,r;if(t===u.length-1){u.length=t}else{s=u.slice(t+1);u.length=t;for(v=0,r=s.length;v<r;++v){u[t+v]=s[v]}}};function a(t){var r;if(typeof t=="string"){return t}else{if(typeof t.hashCode==p){r=t.hashCode();return(typeof r=="string")?r:a(r)}else{if(typeof t.toString==p){return t.toString()}else{try{return String(t)}catch(s){return Object.prototype.toString.call(t)}}}}}function g(r,s){return r.equals(s)}function e(r,s){return(typeof s.equals==p)?s.equals(r):(r===s)}function c(r){return function(s){if(s===null){throw new Error("null is not a valid "+r)}else{if(typeof s=="undefined"){throw new Error(r+" must not be undefined")}}}}var q=c("key"),l=c("value");function d(u,s,t,r){this[0]=u;this.entries=[];this.addEntry(s,t);if(r!==null){this.getEqualityFunction=function(){return r}}}var h=0,j=1,f=2;function o(r){return function(t){var s=this.entries.length,v,u=this.getEqualityFunction(t);while(s--){v=this.entries[s];if(u(t,v[0])){switch(r){case h:return true;case j:return v;case f:return[s,v[1]]}}}return false}}function k(r){return function(u){var v=u.length;for(var t=0,s=this.entries.length;t<s;++t){u[v+t]=this.entries[t][r]}}}d.prototype={getEqualityFunction:function(r){return(typeof r.equals==p)?g:e},getEntryForKey:o(j),getEntryAndIndexForKey:o(f),removeEntryForKey:function(s){var r=this.getEntryAndIndexForKey(s);if(r){n(this.entries,r[0]);return r[1]}return null},addEntry:function(r,s){this.entries[this.entries.length]=[r,s]},keys:k(0),values:k(1),getEntries:function(s){var u=s.length;for(var t=0,r=this.entries.length;t<r;++t){s[u+t]=this.entries[t].slice(0)}},containsKey:o(h),containsValue:function(s){var r=this.entries.length;while(r--){if(s===this.entries[r][1]){return true}}return false}};function m(s,t){var r=s.length,u;while(r--){u=s[r];if(t===u[0]){return r}}return null}function i(r,s){var t=r[s];return(t&&(t instanceof d))?t:null}function b(t,r){var w=this;var v=[];var u={};var x=(typeof t==p)?t:a;var s=(typeof r==p)?r:null;this.put=function(B,C){q(B);l(C);var D=x(B),E,A,z=null;E=i(u,D);if(E){A=E.getEntryForKey(B);if(A){z=A[1];A[1]=C}else{E.addEntry(B,C)}}else{E=new d(D,B,C,s);v[v.length]=E;u[D]=E}return z};this.get=function(A){q(A);var B=x(A);var C=i(u,B);if(C){var z=C.getEntryForKey(A);if(z){return z[1]}}return null};this.containsKey=function(A){q(A);var z=x(A);var B=i(u,z);return B?B.containsKey(A):false};this.containsValue=function(A){l(A);var z=v.length;while(z--){if(v[z].containsValue(A)){return true}}return false};this.clear=function(){v.length=0;u={}};this.isEmpty=function(){return !v.length};var y=function(z){return function(){var A=[],B=v.length;while(B--){v[B][z](A)}return A}};this.keys=y("keys");this.values=y("values");this.entries=y("getEntries");this.remove=function(B){q(B);var C=x(B),z,A=null;var D=i(u,C);if(D){A=D.removeEntryForKey(B);if(A!==null){if(!D.entries.length){z=m(v,C);n(v,z);delete u[C]}}}return A};this.size=function(){var A=0,z=v.length;while(z--){A+=v[z].entries.length}return A};this.each=function(C){var z=w.entries(),A=z.length,B;while(A--){B=z[A];C(B[0],B[1])}};this.putAll=function(H,C){var B=H.entries();var E,F,D,z,A=B.length;var G=(typeof C==p);while(A--){E=B[A];F=E[0];D=E[1];if(G&&(z=w.get(F))){D=C(F,z,D)}w.put(F,D)}};this.clone=function(){var z=new b(t,r);z.putAll(w);return z}}return b})();

示例用法：

<script type="text/javascript" src="js/jshashtable.js"></script>
<script type="text/javascript">
//

    var key1 = new Object();
    var key2 = new Object();
    var key3="0704";
    var h = new Hashtable();
    h.put(key1, "First");
    h.put(key2, "Second");
    h.put(key3,"今天是塗聚文的生日");
    //alert( h.get(key1) ); // Alerts "First"
    //alert( h.get(key2) ); // Alerts "Second"
    var tod=new Date();
    var sy=tod.getFullYear().toString();
    var sm=tod.getMonth().toString();
    var sd=tod.getDay().toString();
    var nod=Date.parse("2008/03/20");

    if(sm.lengh=1)
    {
    	sm="0"+sm;
    }
    if(sd.lengh=1)
    {
    	sd="0"+sd;
    }
    document.write(sy+"-"+sm+"-"+sd+"<br/>");
    var smd=sm+sd;
    //alert();
    document.write(h.get("0704"));
 	//document.forms[0].elements[0].value="2";

</script>
</head>

<body>
<input id="geo" name="geo" class="geo" type="text" value="ge"/>
<form name="form1" method="post" action="">
<input type="text" id="geovindu" name="geovindu" class="geovindu" value=""/>
<script language="javascript" type="text/javascript">
var s=h.get("0704");
var s1=h.get(key1);
 document.getElementById("geovindu").value=s+","+s1+h.get(key3);
 //顯示頁面的所有要素
for (i=0;i<document.form1.elements.length;i++){
document.write("<br>");
   var curname=document.form1.elements[i].name
   var curvalue=document.form1.elements[i].value
   document.write(curname+":"+curvalue);
   }
   //
 </script>
</form>