Thank you for your time.

1. the line from the file means my view on the data, and its actual organization. :o)

2. It is awesome to use the module then -- the only point i'm worrying about is its speed -- w/ the array (as it is now in my script) the data is already in the script (in its array) while w/ the module it seems to me it has to be processed as yet (i.e. to be inputted into array) -- what about tens of thousands of strings? -- Please let know, if had such experience. -- It's better to know before doing! :o).

3. Actually i've written the code already (this is from whence the _\'_ combination comes -- and it works only once: when adding new data to the file -- then, multiple times it works as is w/o checking/modification.

4. I did not edit. but had noted that will use array elements as regexps -- but what does it change?

5. No, i didn't see that, but i will go to read it. Thank you, again.

"...i'm worrying about is its speed...the data is already in the script...what about tens of thousands of strings?"

I assume you expect/want qweqwe rtyr tyr \'asdasd fghfghfgh as output, right?

Perhaps it might be an alternative to write your data to a file as JSON with something like this:

use JSON::XS;
my $data = [qw( qweqwe rtyr tyr \'asdasd fghfghfgh)];
my $json = encode_json $data; 
# to file...
[download]

Then process your data line by line as usual:

#!/usr/bin/env perl

use JSON::XS;
use strict;
use warnings;
use feature qw (say);
# use Data::Dump;

open my $fh, '<', 'data.dat' or die $!;

while ( my $line = <$fh> ) {
    chomp $line;
    say nikolay( decode_json($line) );
}

close $fh;

sub nikolay {
    my $data = shift;
    join " ", @$data; # what ever...
}

__END__

karls-mac-mini:monks karl$ ./json.pl 
qweqwe rtyr tyr \'asdasd fghfghfgh

...
[download]

Please see also JSON::XS, JSON and Benchmark.

Edit: Link added.

Best regards, Karl

«The Crux of the Biscuit is the Apostrophe»

Thank you, Karl, but i think it is a lot of overhead for my script at run time. -- Suppose to run nikolay sub. 10 000 times! -- How it is now -- i like because it is already in array (ready to use): to be fed to reg.exp.

Alright, i think we can finish here. -- I have learned a lot from all the answers! -- And that would have impact on my future PERL development. Thank you all!