Comments on the Perl code for proposals and love

 #!/usr/bin/perl -w
    use strict;

         my$f=           $[;my
       $ch=0;sub       l{length}
     sub r{join"",   reverse split
    ("",$_[$[])}sub ss{substr($_[0]
    ,$_[1],$_[2])}sub be{$_=$_[0];p
     (ss($_,$f,1));$f+=l()/2;$f%=l 
      ();$f++if$ch%2;$ch++}my$q=r
       ("\ntfgpfdfal,thg?bngbj".    
        "naxfcixz");$_=$q; $q=~
          tr/f[a-z]/ [l-za-k]
            /;my@ever=1..&l
              ;my$mine=$q
                ;sub p{
                 print
                  @_;
                   }

           be $mine for @ever

    perl -MO=Deparse heart_raw.pl > heart_deparse.pl

 BEGIN { $^W = 1; }
    use strict 'refs';
    my $f = $[;
    my $ch = 0;
    sub l {
        length $_;
    }
    sub r {
        join '', reverse(split(//, $_[0], 0));
    }
    sub ss {
        substr $_[0], $_[1], $_[2];
    }
    sub be {
        $_ = $_[0];
        p(ss($_, $f, 1));
        $f += l() / 2;
        $f %= l();
        ++$f if $ch % 2;
        $ch++;
    }
    my $q = r("\ntfgpfdfal,thg?bngbjnaxfcixz");
    $_ = $q;
    $q =~ tr/[]a-z/[]l-p r-za-k/;
    my(@ever) = 1 .. &l;
    my $mine = $q;
    sub p {
        print @_;
    }
    be $mine foreach (@ever);

#Open the warning switch
    BEGIN { $^W = 1; }

#Symbol Reference Check
    use strict 'refs';

#The index number of the first element in the array
    my $f  = $[;
    my $ch = 0;

#Note that there is a newline character in the string
    my $q = r("\ntfgpfdfal,thg?bngbjnaxfcixz");
    $_ = $q;
    $q =~ tr/[]a-z/[]l-p r-za-k/;

    my (@ever) = 1 .. &l;
    my $mine = $q;

    be($mine) foreach (@ever);

#Get the length of the string
    sub l {
        length $_;
    }

#Invert string
#join, 0 is used to make up the numbers, and can be omitted
    sub r {
        join '', reverse( split( //, $_[0], 0 ) );
    }

#Extract substrings in strings
    sub ss {
        substr $_[0], $_[1], $_[2];
    }

#Output
    sub p {
        print @_;
    }

#Extract a character alternately from the first and second half of the string and output it
    sub be {
        $_ = $_[0];
        p( ss( $_, $f, 1 ) );
        $f += l() / 2;
        $f %= l();
        ++$f if $ch % 2;
        $ch++;
    }

 #!/usr/bin/env perl

    use strict;
    use warnings;
    use utf8;

    my $pointer   = 0;
    my $character = 0;
    my $string    = reverse("\ntfgpfdfal,thg?bngbjnaxfcixz");
    $string =~ tr/a-z/l-p r-za-k/;
    foreach ( 1 .. length($string) ) {
        print substr( $string, $pointer, 1 );
        $pointer += length($string) / 2;
        $pointer %= length($string);
        ++$pointer if $character % 2;
        $character++;
    }

kristen, will you marry me?