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Generally, your code is OK, but I would like to point out some things which can be improved.

#declare the filehandeles outside the foreach loop
Why? You can write less code (e.g. open my $filehandle, ...) and (if you declare it inside the loop) Perl will close the filehandle automatically right after current iteration of the block finishes executing.

opendir (DIR, $dir) or die $!; my @textFiles = grep /\.txt/, readdir DIR;
For simple matching of directory contents diamond operator (glob) can serve using smaller code: my @files = <*.txt>; - without any need to open or close any directories.

By the way, you can open just "." instead of using Cwd. "." means "current directory" in modern operating systems.

my $text_file_out = $text_file; $text_file_out =~ s/\.txt//; $text_file_out = $text_file_out . '_new.txt';
This can be done in one operation: (my $text_file_out = $text_file) =~ s/\.txt$/_new.txt/;. Another option: my $text_file_out = $text_file =~ s/\.txt$/_new.txt/r; (/r modifier is available since Perl 5.14, see Regexp Quote Like Operators).

Sorry if my advice was wrong.

In reply to Re: Processing multiple files by aitap
in thread Processing multiple files by mocnii

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