If ikegami's excellent suggestions aren't enough, there's also a Bit::Vector module on CPAN.

One nice thing about the bitwise operators in Perl is that you can use them on whole strings, not just on integers. For example,

use strict;
my $x = "abcdefghijklmnopqrstuvwxyz";
my $y = ("A" ^ "a") x length($x);
my $z = $x & ~$y;
print "\$z = $z\n";
[download]

This outputs $z = ABCDEFGHIJKLMNOPQRSTUVWXYZ. (This is just an example, not recommended for case conversion because it screws up non-alphabetic characters.)

You should also be aware of pack/unpack "H*", pack/unpack "B*", or "b*, to print bit strings for debugging, to input long constants, etc.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.