X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fcore_ext%2Ftry.rb;fp=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fcore_ext%2Ftry.rb;h=3de198d1987185d7325a56294bcf9f703123ffe6;hb=437aa336c44c74a30aeea16a06743c32747ed661;hp=0000000000000000000000000000000000000000;hpb=97a0772b06264134cfe38e7494f9427efe0840a0;p=feedcatcher.git diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/try.rb b/vendor/rails/activesupport/lib/active_support/core_ext/try.rb new file mode 100644 index 0000000..3de198d --- /dev/null +++ b/vendor/rails/activesupport/lib/active_support/core_ext/try.rb @@ -0,0 +1,36 @@ +class Object + # Invokes the method identified by the symbol +method+, passing it any arguments + # and/or the block specified, just like the regular Ruby Object#send 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 + # + # Without try + # @person && @person.name + # or + # @person ? @person.name : nil + # + # With try + # @person.try(:name) + # + # +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 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(method, *args, &block) + send(method, *args, &block) + end + remove_method :try + alias_method :try, :__send__ +end + +class NilClass + def try(*args) + nil + end +end