Hey Feztaa...

[inkedmn]

I have an idea...

let's both code a simple program, me in python, you in perl. we'll compare the two side-by-side when we're done and see who's code looks cleaner.

what do you think?

[Feztaa]

Ok. How about you write a rot13 encryption program in python.

The only requirements are that it must rot13 encode whatever the commandline arguments are, and if there are none it takes input from stdin and rot13 encodes that.

If you don't know what rot13 is, it basically means to convert letters into numbers, subtract 13, and convert it back into letters. So a=n, b=o, c=p, etc (and vice versa).

Here's mine:

#!/usr/bin/env perl

sub rot13
{
 $string=join(' ',@_);
 $string=~tr/a-zA-Z/n-za-mN-ZA-M/;
 print $string;
}

if (defined(@ARGV))
{
 rot13(@ARGV);
}
else
{
 while (<STDIN>)
 {
  rot13("$_");
 }
}

print "\n";

Have fun!

For fun, I made it in Ruby (and I'll leave the Python code to inkedmn though I have the solution):

#!/usr/bin/env ruby

class String
 def rot13
  tr! "A-Za-z", "N-ZA-Mn-za-m"
 end
end


if ARGV.size < 1 then
 ARGF.each do |x|
  print x.rot13 + " "
 end

else
 ARGV.each do |x|
  print x.rot13 + " "
 end
end

print "\n"

[Feztaa]

I don't know any ruby, but what the hell is ARGF?

I don't know any ruby, but what the hell is ARGF?

equivalent of

while (<STDIN>) {}

[kmj]

I don't know any ruby, but what the hell is ARGF?

I'm guessing it's typossian for ARGV.

[Feztaa]

I'm guessing it's typossian for ARGV.

It can't be, though, because then the if statement would be pointless -- the same thing would be happening in the else block as the initial if block.

[kmj]

It can't be, though, because then the if statement would be pointless -- the same thing would be happening in the else block as the initial if block.

yeah, I hadn't noticed that gnuvince already explained it.

[inkedmn]

sorry it took so long, haven't had any free time...

#!/usr/bin/env python
from string import maketrans, translate

def rot13():
 * *string = raw_input("Enter something: ")
 * *trans = maketrans( "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
 * * * * * * * * * * *"NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm" )
 * *newstring = translate(string, trans)
 * *print newstring
 * *return newstring
rot13()

clean as a whistle, amigo

[binaryDigit]

python is so cool.
;D 8) ;D 8) ;D 8)