# Reverse the byte array in place
	#
	#     var b = "abcd".to_bytes
	#     b.reverse
	#     assert b.to_s == "dcba"
	fun reverse
	do
		var l = length
		for i in [0..l/2[ do
			var tmp = self[i]
			self[i] = self[l-i-1]
			self[l-i-1] = tmp
		end
	end