Re^2: Reading Multiple files

[maheshkumar]

I am not an expert in perl but the code that i have written already defines a file name so what should i do with that? Sorry I did not understand your code completely I am still doing it. Any help on this?

[2teez]

..the code that i have written already defines a file name..

The script I wrote, was on the premises that you want to write your selected "data", from each of the file, to a new file each.
So, if your intention, then is to use just one file, to get all the selected "data", from various files in the directory ( or directories ), since you said you already have a filename. Then, you might have to modify, your code a bit.
However, I might be wrong here. Please, if I may clear thing out.
How are you getting your new files?
Are you writing, all your output to a single file?
Or to a new file for EACH file you are reading from?

[maheshkumar]

Basically what i am doing is that I have around 100 text files with different file names (random names) for example TR1, TR2 and so on. I am extracting data from TR1 and saving it in another file called TR1_Result. I want a code which does this on all files and creates new result file for each of them

[2teez]

Hi,

That is what the code I gave is really doing.

sub work_n_save {
    ...  ## whatever
    my $filename = $File::Find::name if !-d;   ## get file name if not
+ directory
    $filename = basename($filename);           ## get the file base na
+me
 ## The line below assumes, files have extention
    $filename =~ s/\..+$//;                    ## remove the file exte
+ntion
    open my $fh_new, '>', $filename . "_Result" or croak "can't open f
+ile: $!";
    open my $fh, '<', $_ or croak "can't open file: $!";
    while ( defined( my $line = <$fh> ) ) {
        chomp $line;
          ## do whatever you want
        print {$fh_new} $line, $/;
    }
}

NOTE:

Please, don't forget that the subroutine "work_n_save" is called as sub. reference in the find subroutine of the module File::Find, which transverse the whole of the directory ( or directories).
Also, note the way the new files are opened:

open my $fh_new, '>', $filename . "_Result" or croak "can't open file:
+ $!";

Hope this helps.