Since Luke Gorrie encouraged me to learn Erlang, I have been playing with a bit with the language. One of the most attracting points is bit syntax. When you want a byte array with 65, 66, 67. I can write it as <<65,66,67>>. Further more, When you want a bit pattern of 4 in four bits, 1 in four bits and 0x4243 in 16 bits, you may say <<4:4, 1:4, 16#4243:16>>. What a cool! $ erl Eshell V5.6.4 (abort