Initial import

spec/spec_helper.rb

@@ -0,0 +1,10 @@
+require 'rspec'
+
+$: << File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib'))
+
+def binary(str_ary)
+  str_ary.collect do |d|
+    raise ArgumentError.new("Bad part") unless d =~ /\A[a-f0-9]{2}\Z/i
+    d.to_i(16).chr
+  end.join("")
+end