diff options
Diffstat (limited to 'activesupport/lib')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/try.rb | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/activesupport/lib/active_support/core_ext/try.rb b/activesupport/lib/active_support/core_ext/try.rb index 0dccd40c55..c7c7778a77 100644 --- a/activesupport/lib/active_support/core_ext/try.rb +++ b/activesupport/lib/active_support/core_ext/try.rb @@ -1,6 +1,9 @@ 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. + # Invokes the method identified by +symbol+, passing it any arguments + # and/or the block specified, just like the regular Ruby <tt>Object#send</tt> does. + # + # *Unlike* that method however, a +NoMethodError+ exception will *not* be raised + # and +nil+ will be returned instead, if the receiving object is a +nil+ object or NilClass. # # ==== Examples # @@ -12,13 +15,15 @@ class Object # With try # @person.try(:name) # - # Try also accepts arguments/blocks for the method it is trying + # +try+ also accepts arguments and/or a block, 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) + # This method definition below is for rdoc purposes only. The alias_method call + # below overrides it as an optimization since +try+ behaves like +Object#send+, + # unless called on +NilClass+. + def try(symbol, *args, &block) + send(symbol, *args, &block) end alias_method :try, :__send__ end |