diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object/try.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/object/try.rb | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb index 48e9d04787..ff812234e3 100644 --- a/activesupport/lib/active_support/core_ext/object/try.rb +++ b/activesupport/lib/active_support/core_ext/object/try.rb @@ -1,13 +1,12 @@ class Object - ## - # :method: try - # # Invokes the method identified by the symbol +method+, 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. # + # If try is called without a method to call, it will yield any given block with the object. + # # ==== Examples # # Without try @@ -21,10 +20,18 @@ class Object # +try+ also accepts arguments and/or a block, for the method it is trying # Person.try(:find, 1) # @people.try(:collect) {|p| p.name} + # + # Without a method argument try will yield to the block unless the reciever is nil. + # @person.try { |p| "#{p.first_name} #{p.last_name}" } #-- # +try+ behaves like +Object#send+, unless called on +NilClass+. - - alias_method :try, :__send__ + def try(*a, &b) + if a.empty? && block_given? + yield self + else + __send__(*a, &b) + end + end end class NilClass #:nodoc: |