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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