As Jos said, there are the bitwise operations. There's even an
operation to pick out an arbitrary range of bits.
http://docs.racket-lang.org/reference/generic-numbers.html#(part._.Bitwise_.Operations)
I have used these bitwise operations to in my Racket consulting work
recently, for data conversion of technical data from a cool embedded system.
There are some esoteric bit-twiddling tricks that C can do faster, but
few people actually know how to do those and have a need.
In addition to the bitwise operations, it's helpful to know that
"number->string" has an optional radix argument, and that the reader
supports integer literals in binary like "#b1011".
--
http://www.neilvandyke.org/
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