Add Object#instance_exec and Proc#bind

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3469 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

2 files changed, 18 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/object_and_class.rb b/activesupport/lib/active_support/core_ext/object_and_class.rb
index 4856a9f5d5..d44afbd839 100644
--- a/activesupport/lib/active_support/core_ext/object_and_class.rb
+++ b/activesupport/lib/active_support/core_ext/object_and_class.rb
@@ -65,6 +65,12 @@ class Object #:nodoc:
   def to_json
     ActiveSupport::JSON.encode(self)
   end
+  
+  unless defined? instance_exec # 1.9
+    def instance_exec(*arguments, &block)
+      block.bind(self)[*arguments]
+    end
+  end
 end
 
 class Class #:nodoc:
diff --git a/activesupport/lib/active_support/core_ext/proc.rb b/activesupport/lib/active_support/core_ext/proc.rb
new file mode 100644
index 0000000000..2ca23f62ef
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/proc.rb
@@ -0,0 +1,12 @@
+class Proc #:nodoc:
+  def bind(object)
+    block, time = self, Time.now
+    (class << object; self end).class_eval do
+      method_name = "__bind_#{time.to_i}_#{time.usec}"
+      define_method(method_name, &block)
+      method = instance_method(method_name)
+      remove_method(method_name)
+      method
+    end.bind(object)
+  end
+end