Add bin and edit workflow

bin/gems/facets-3.1.0/lib/standard/facets/nullclass.rb

@@ -0,0 +1,38 @@
+# = Nullclass
+#
+# NullClass is essentially NilClass but it differs in one
+# important way. When a method is called against it that it
+# deoesn't have, it will simply return null value rather then
+# raise an error.
+#
+# TODO: Perhaps NullClass should be called NackClass?
+
+class NullClass #< NilClass
+  class << self
+    def new
+      @null ||= NullClass.allocate
+    end
+  end
+  def inspect ; 'null' ; end
+  def nil?  ; true ; end
+  def null? ; true ; end
+  def [](key); nil; end
+  def method_missing(sym, *args)
+    return nil if sym.to_s[-1,1] == '?'
+    self
+  end
+end
+
+module Kernel
+  def null
+    NullClass.new
+  end
+end
+
+class Object
+  def null?
+    false
+  end
+end
+
+# Copyright (c) 2005 Thomas Sawyer