add a Rakefile

Author: monkstone

nature-of-code/xor/README.md

@@ -1,10 +1,10 @@
 Building the xor (neural net) Library
 ===================
 
-Here we do a [polyglot maven][polyglot] build. But you could do a manual build quite easily if you wished. If you have a recent maven installed all you need to do is
+Here we do a [polyglot maven][polyglot] build. But you could do a manual build quite easily if you wished. If you have a recent maven installed all you need to do is to compile and run.
 
 ```bash
-mvn package
+rake
 ```
 
 See also how to build jruby [extensions][extensions] with polyglot maven

nature-of-code/xor/Rakefile

@@ -0,0 +1,11 @@
+task default: [:compile, :run]
+
+desc 'Compile'
+task :compile do
+  sh 'mvn package'
+end
+
+desc 'Run'
+task :run do
+  sh 'jruby xor.rb'
+end