Greetings,

In a recent project, I needed some code that applied a mask against a bitstring.
I didn't have a clue how to achieve that sort of thing at the time, so the fabulous BrowserUk supplied the following code to XOR and AND the two strings: 

my @xored = map { ord } split //, $str1 ^ $str2;

my @anded = map { ord } split //, $str1 & $str2;

[download]

At the time, I was looking for fast ways of doing things, and I remembered Bit::Vector can do this sort of thing (and a lot more besides), so I came up with the following: 

use Bit::Vector;

sub gen_xor {

  my $len = length $_[0];

  my $vec1 = Bit::Vector->new_Bin($len, $_[0]);
  my $vec2 = Bit::Vector->new_Bin($len, $_[1]);
  $vec2->Xor($vec1, $vec2);
  $vec2->to_Bin();
}

sub gen_and {

  my $len = length $_[0];

  my $vec1 = Bit::Vector->new_Bin($len, $_[0]);
  my $vec2 = Bit::Vector->new_Bin($len, $_[1]);
  $vec2->And($vec1, $vec2);
  $vec2->to_Bin();
}

print gen_xor('10011', '01110'), "\n";
print gen_and('10011', '01110'), "\n";

[download]

Although I'm happy with both BrowserUk's code and my own version using Bit::Vector, I'd like to see some more ways of doing this, as it's been bugging me :-)

Although the original code that inspired this post only required XOR or AND, I'd also be interested to see two bitstrings NAND'ed too.

Golf, Obfu, or truly useful code, please post below!

Cheers

BazB

Update: Corrected first code section.

If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
That way everyone learns.

In reply to XOR, AND or NAND'ing bitstrings. by BazB

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