btm · September 30, 2013 17:59 · Sep 30, 2013
diff --git a/cvar.rb b/cvar.rb
@@ -0,0 +1,40 @@
+class A
+  @@cvar = {}
+
+  def mutate
+    @@cvar[:foo] = "bar"
+  end
+
+  def add(k,v)
+    @@cvar[k] = v
+  end
+
+  def show
+    p @@cvar
+  end
+end
+
+a = A.new
+a.mutate
+p "before:"
+a.show
+a.add("yellow","elephant")
+
+a.show
+
+class A
+  @@cvar = {}
+
+  def mutate
+    @@cvar[:baz] = "qux"
+  end
+
+  def show
+    p @@cvar
+  end
+end
+
+a = A.new
+a.mutate
+p "after:"
+a.show
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -0,0 +1,5 @@
+"before:"
+{:foo=>"bar"}
+{:foo=>"bar", "yellow"=>"elephant"}
+"after:"
+{:baz=>"qux"}