一个类似与PHP的var_dump函数的方法(打印一个变量的结构-包括复杂的array和object)。
if(typeof(Class)=='undefined'){
var Class = {
create: function() { return function() { 
this.initialize.apply(this, arguments);
} } }
}var StrR=function(str,len){ var Str=""; for(var i=0;i<len;i++) Str+=str; return Str;}
/* * It is a function has similar function of PHP function var_dump * @usage: var v=new VAR(xml);// xml is the variable which you want to print out. msg=v.dump(); // msg contains the construct of the variable. */var VAR=Class.create();VAR.prototype = { initialize: function(variable) { this.Var = variable; }, OL:function(arg){ if(arg==null||arg==undefined) return arg; if(arg.length!=undefined){ return '<i>Array</i> ('+arg.length+')'; }else{ var count=0; for(var o in arg){ count++; } return '<i>Object</i> ('+count+')'; } }, dumpO:function(VAr,deepth){ var rtn=""; var prefix=StrR(' ',deepth); if(VAr==null||VAr==undefined) return prefix+VAr; if(VAr.length!=undefined){ for(var i=0;i<VAr.length;i++){ rtn+=prefix+'['+i+'] =>{ '+this.dump(VAr[i],deepth+1)+prefix+" }<br/>"; } }else{ var ct=0; for(var o in VAr){ rtn+=prefix+'<i>'+o+'</i> =>{ '+this.dump(VAr[o],deepth+1)+prefix+" }<br/>"; ct++; } } return rtn; }, dump:function(){ var rtn="<pre>"; if(typeof(arguments[0])=='undefined'){ var _var=this.Var; var deepth=0; }else{ var _var=arguments[0]; var deepth=arguments[1]; } var prefix=StrR(' ',deepth); var type = typeof(_var); //document.write(type); switch (type){ case 'string': case 'number': case 'boolean': rtn+=prefix+type+"["+(_var+'').length+"] => "+_var+'<br/>'; break; case 'object': rtn+=prefix+this.OL(_var)+' => {<br/>'+this.dumpO(_var,deepth+1)+"<br/>"+prefix+"}<br/>"; break; default: rtn+=prefix+type+"["+(_var+'').length+"] => "+_var+' *<br/>'; break; } return rtn+'</pre>'; }}一个例子：
拿我写的那个装载xml到数组的方法(http://tb.blog.csdn.net/TrackBack.aspx?PostId=1806052)装载如下XML(game.xml)到变量xml:
<?xml version="1.0" encoding="utf-8" ?><Login> <Character> <C Text="热血" Value="0"></C> <C Text="弱气" Value="1"></C> <C Text="激情" Value="2"></C> <C Text="冷静" Value="3"></C> <C Text="冷酷" Value="4"></C> </Character> <Weapon> <W Text="光束剑" Value="0"></W> <W Text="光束配刀" Value="1"></W> </Weapon> <EconomyProperty> <P Text="平均型" Value="0"> </P> <P Text="重视攻击" Value="1"> </P> <P Text="重视敏捷" Value="2"> </P> <P Text="重视防御" Value="3"> </P> <P Text="重视命中" Value="4"> </P> </EconomyProperty></Login>装载的代码：
xml=loadXML('game.xml');
显示变量结构的代码
var v=new VAR(xml);
msg=v.dump();
document.write(msg);
msg=v.dump();
document.write(msg);
结果：
Array (3) => {
[0] =>{ Object (3) => {
$name =>{ string[9] => Character
}
$value =>{
null => {
null
}
}
C =>{
Array (5) => {
[0] =>{ Object (4) => {
$name =>{ string[1] => C
}
$value =>{
null => {
null
}
}
Text =>{
string[2] => 热血
}
Value =>{
string[1] => 0
}
}
}
[1] =>{
Object (4) => {
$name =>{ string[1] => C
}
$value =>{
null => {
null
}
}
Text =>{
string[2] => 弱气
}
Value =>{
string[1] => 1
}
}
}
[2] =>{
Object (4) => {
$name =>{ string[1] => C
}
$value =>{
null => {
null
}
}
Text =>{
string[2] => 激情
}
Value =>{
string[1] => 2
}
}
}
[3] =>{
Object (4) => {
$name =>{ string[1] => C
}
$value =>{
null => {
null
}
}
Text =>{
string[2] => 冷静
}
Value =>{
string[1] => 3
}
}
}
[4] =>{
Object (4) => {
$name =>{ string[1] => C
}
$value =>{
null => {
null
}
}
Text =>{
string[2] => 冷酷
}
Value =>{
string[1] => 4
}
}
}
}
}
}
}
[1] =>{
Object (3) => {
$name =>{ string[6] => Weapon
}
$value =>{
null => {
null
}
}
W =>{
Array (2) => {
[0] =>{ Object (4) => {
$name =>{ string[1] => W
}
$value =>{
null => {
null
}
}
Text =>{
string[3] => 光束剑
}
Value =>{
string[1] => 0
}
}
}
[1] =>{
Object (4) => {
$name =>{ string[1] => W
}
$value =>{
null => {
null
}
}
Text =>{
string[4] => 光束配刀
}
Value =>{
string[1] => 1
}
}
}
}
}
}
}
[2] =>{
Object (3) => {
$name =>{ string[15] => EconomyProperty
}
$value =>{
null => {
null
}
}
P =>{
Array (5) => {
[0] =>{ Object (4) => {
$name =>{ string[1] => P
}
$value =>{
null => {
null
}
}
Text =>{
string[3] => 平均型
}
Value =>{
string[1] => 0
}
}
}
[1] =>{
Object (4) => {
$name =>{ string[1] => P
}
$value =>{
null => {
null
}
}
Text =>{
string[4] => 重视攻击
}
Value =>{
string[1] => 1
}
}
}
[2] =>{
Object (4) => {
$name =>{ string[1] => P
}
$value =>{
null => {
null
}
}
Text =>{
string[4] => 重视敏捷
}
Value =>{
string[1] => 2
}
}
}
[3] =>{
Object (4) => {
$name =>{ string[1] => P
}
$value =>{
null => {
null
}
}
Text =>{
string[4] => 重视防御
}
Value =>{
string[1] => 3
}
}
}
[4] =>{
Object (4) => {
$name =>{ string[1] => P
}
$value =>{
null => {
null
}
}
Text =>{
string[4] => 重视命中
}
Value =>{
string[1] => 4
}
}
}
}
}
}
}
}
参考文章：
javascript解析XML的方法 作者:luke 日期:2007-05-31 URL http://www.lukee.cn/article.asp?id=396
