nice. i like that regular expression example. but i agree that the split
method is probably quicker. thanks
Christof Donat wrote:
>
> Hi,
>
>> i want to grab just the filename and extension from the following string:
>>
>> str1="F:\\Test1\\Test2\\Test3\\test.txt";
>>
>> i want to grab "test.txt"
>>
>> i use this code:
>>
>> file1=(str1.split("\\"))[(str1.split("\\")).length-1];
>>
>> i was wondering if there is a better way to grab that part of the string
>
> Yes, of course:
>
> var tmp = str1.split("\\");
> file1 = tmp[tmp.length-1];
>
> That way the JS-interpreter doesn't need to split the string twice. I
> think
> that this is the fastest aproach.
>
> Another aproach could be:
>
> file1 = str1;
> var tmp;
> while( (tmp = file1.indexOf("\\")) >= 0 ) file1 = file1.substr(tmp+1);
>
> But I think, that is slower. The advantage is that it is easy to
> understand
> that you ar working on the string.
>
> Yet another aproach:
>
> file1 = str1.match(/[^\\]*$/);
>
> I guess this can compete in performance with the split()-method - shold be
> just a bit slower since the evaluation of a regular expression is more
> complex than a simple split.
> It is the shortest variant, but not the most readable.
>
> If you ask me I would either recomend the split()-method or the
> regular-expression-method.
>
> Christof
>
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> http://jquery.com/discuss/
>
>
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