Refactor Object#try to use inheritance. [#1774 state:resolved]

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/try.rb b/activesupport/lib/active_support/core_ext/try.rb
new file mode 100644
index 0000000000..0dccd40c55
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/try.rb
@@ -0,0 +1,30 @@
+class Object
+  # Tries to send the method only if object responds to it. Return +nil+ otherwise.
+  # It will also forward any arguments and/or block like Object#send does.
+  #
+  # ==== Examples
+  #
+  # Without try
+  #   @person && @person.name
+  # or
+  #   @person ? @person.name : nil
+  #
+  # With try
+  #   @person.try(:name)
+  #
+  # Try also accepts arguments/blocks for the method it is trying
+  #   Person.try(:find, 1)
+  #   @people.try(:collect) {|p| p.name}
+  #--
+  # This method def is for rdoc only. The alias_method below overrides it as an optimization.
+  def try(method, *args, &block)
+    send(method, *args, &block)
+  end
+  alias_method :try, :__send__
+end
+
+class NilClass
+  def try(*args)
+    nil
+  end
+end