use strict;
use warnings;
use List::Util qw(shuffle);
sub encode {
my ($text, @alphabet) = @_;
local $" = '';
eval "\$text =~ tr/a-z/@alphabet/";
$_ = uc for @alphabet;
eval "\$text =~ tr/A-Z/@alphabet/";
$text
}
sub decode {
my ($text, @alphabet) = @_;
local $" = '';
eval "\$text =~ tr/@alphabet/a-z/";
$_ = uc for @alphabet;
eval "\$text =~ tr/@alphabet/A-Z/";
$text
}
sub no_lt_ws {
local $_ = shift;
s/^\s+//;
s/\s+$//;
$_
}
my $opt = shift;
my $func;
my @alphabet;
if ($opt eq '-e') {
$func = \&encode;
@alphabet = shuffle('a'..'z');
}
elsif ($opt eq '-d') {
$func = \&decode;
local $| = 1;
print "Alphabet: ";
@alphabet = split /[^a-z]+/i, no_lt_ws(scalar <STDIN>);
}
else {
die "Usage: $0 <-e(ncode)/-d(ecode)> [filenames]";
}
print "Alphabet: @alphabet\n";
while (<>) {
print $func->($_, @alphabet);
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|