Merge pull request #1195 from dmathieu/try_undefined_method

Don't raise NoMethodError the tried method doesn't exists

activesupport/lib/active_support/core_ext/object/try.rb

@@ -28,6 +28,8 @@ class Object
   def try(*a, &b)
     if a.empty? && block_given?
       yield self
+    elsif !a.empty? && !respond_to?(a.first)
+      nil
     else
       __send__(*a, &b)
     end

activesupport/test/core_ext/object_and_class_ext_test.rb

@@ -99,7 +99,13 @@ class ObjectTryTest < Test::Unit::TestCase
   def test_nonexisting_method
     method = :undefined_method
     assert !@string.respond_to?(method)
-    assert_raise(NoMethodError) { @string.try(method) }
+    assert_nil @string.try(method)
+  end
+  
+  def test_nonexisting_method_with_arguments
+    method = :undefined_method
+    assert !@string.respond_to?(method)
+    assert_nil @string.try(method, 'llo', 'y')
   end
 
   def test_valid_method