FNV-1a Hash (http://isthe.com/chongo/tech/comp/fnv/) in Ruby.

fnv32a.rb

module Hashcode
  FNV1_32A_INIT = 0x811c9dc5
  FNV_32_PRIME = 0x01000193

  UINT32_MAX = 2 ** 32

  module_function
  def fnv32a( str )
    hval = FNV1_32A_INIT
    str.bytes.each do |s|
      hval = hval ^ s
      hval = (hval * FNV_32_PRIME) % UINT32_MAX
    end
    return hval
  end
end