Basic Regex 1

[Extension]

Hi,

I have some strings in the following format "05.dat". The filename is always two digits + the extension (.dat)

Now I simply want to keep the two digits before the extension.

Would it be better and more efficient to use a Regex or to use the split function ?

Thanks for your help.

 

[TonyGroves]

Regex is the way to go:
[tt]
($number)=$filename=~/(\d+)\./;
[/tt]

 

[BrianAtWork]

Or

$filename =~ /\.dat$//;

to remove the .dat from the end

 

[ishnid]

Missing an "s" there Brian:

$filename =~ s/\.dat$//;

 

[Extension]

Thanks to everyone. I guess I will stick to a Regex.

 

[MillerH]

While the other regex's suggested will work, I would encourage you to error check by more explicitly specifying what you are looking for. The need for this of course depends on what you're doing, but the others will match all sorts of alternate cases.

($number) = $filename =~ /^(\d\d)\.dat$/;
if ($number eq '') {
    die "problems found in $filename";
}