Re^5: Adding a TAB after a certain ammount of characters

[biancoari]

Now the file looks like this perl1.pl script looks like this (after some modifications I did from reading the replies

 #!/usr/local/bin/perl 
perl -Mstrict -Mwarnings -E 
my $text =
   q{2013020400000000006810083610022013068100200220130688000200494};
my @offs = ( 17, 6, 31, 3, 3 );
my @cums = ( 0 );
push @cums, $_ + $cums[ -1 ] for @offs;
substr $text, $_, 0, q{-} for reverse @cums[ 1 .. $#cums ];
say $text;

And the reply I get from running the script is:

biancoari@biancoari ~/Desktop $ perl perl1.pl
syntax error at perl1.pl line 2, near "E
my "
Execution of perl1.pl aborted due to compilation errors.

I will add the

open(FILE, "filename.txt") or die "Could not open file: $!"

and modify the text, any idea if I am heading the right direction?

[hdb]

You need to remove the second line alltogether.

perl -Mstrict -Mwarnings -E

[choroba]

Replace the second line

perl -Mstrict -Mwarnings -E

which is for the shell with equivalent Perl lines:

use strict;
use warnings;
use feature 'say';

[biancoari]

This is working GREAT!!!




#!/usr/local/bin/perl 
use strict;
use warnings;
use feature 'say';
my $text =
   q{2013020400000000006810083610022013068100200220130688000200494};
my @offs = ( 17, 6, 31, 3, 3 );
my @cums = ( 0 );
push @cums, $_ + $cums[ -1 ] for @offs;
substr $text, $_, 0, q{-} for reverse @cums[ 1 .. $#cums ];
say $text;




Now what is need to do is to modify all the lines of the file, I know that I need to call the file, like this


 open(FILE, "file1.txt") or die "Could not open file: $!";


Am I heading on the right direction?

[choroba]

Almost. Use lexical file handles and three argument open:

open my $FILE, '<', 'file1.txt' or die "Cannot open file1.txt: $!";

To iterate over the lines of the file, use the diamond operator in a while loop:

while (my $text = <$FILE>) {
    chomp $text;
    my @cums = (0);
    # ...
}

You can define the @offs outside the loop because they never change.