Got it!i've settled this problem this afternoon.:>
Thx.You ur really a leery man.
On 4月4日, 下午8时01分, Colin Mollenhour <[EMAIL PROTECTED]> wrote:
> Looks like it should work to me, but I don't know because you are very
> specific in your boolean tests. For example:
> var blah = 'true'; //the string "true"
> blah == true //this is false
>
> elem.isDefault==true //this probably isn't working...
>
> I don't know what getAttribute("default") is returning in your case, but
> say it is a string representation of "true"/"false". If so, change line
> 26 of your pastie to:
> isDefault: elem.getAttribute("default") == "true",
>
> Now, in displayTopic, to get the topic use this simplified code:
> var topic = topics.find( topicID ?
> function(elem){ return elem.isDefault } :
> function(elem){ return elem.id == topicID } );
>
> Firefox and Firebug are your friends if there is any doubt as to what
> values you have stored and how they are comparing in your code.
>
> Colin
>
> Vin wrote:
> > Dear Colin:
> > I took few minutes this morning to modify my code following your
> > suggestion,and it works,but not entirely.
> > There is a problem in the "displayTopic" function,where and when i use
> > the "find" method of prototype's Enumerable object,and i couldn't
> > figure it out.Is there anything wrong with my iterator function in
> > that "find" method??
> > I wrote the "displayTopic" function like this,and the iterator
> > function as its nested function:
> > The detail code i've pasted to pastie:http://pastie.caboo.se/
> > 51571[line 73]
> > function displayTopic(topicID){
> > var topic;
> > function iterator(elem){
> > if(topicID==null ||topicID==""){
> > return (elem.isDefault==true)?true:false;
> > }else{
> > return (elem.id==topicID)?true:false;
> > }
> > };
> > //find method here
> > topic=topics.find(iterator);
> > alert(topic.id);//this's for test,it show nothing.
> > alert("hi");//this's for test too,it show "hi"
> > ....
> > ....
> > }
>
> > Sincerely bookish Vin.:>
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