delete code, untested

config/initializers/active_file.rb

@@ -0,0 +1,16 @@
+require "active_hash"
+
+module ActiveHash
+  Base.class_eval do
+
+    def self.delete(id) # only works with id's
+      @record_index.delete(id.to_s)
+      @records.delete_if{|record| record[:id] == id.to_i}
+      true
+    end
+
+    def the_private_records
+      @records
+    end
+  end
+end