diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object')
3 files changed, 25 insertions, 3 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/duplicable.rb b/activesupport/lib/active_support/core_ext/object/duplicable.rb index c5d59128e5..665cb0f96d 100644 --- a/activesupport/lib/active_support/core_ext/object/duplicable.rb +++ b/activesupport/lib/active_support/core_ext/object/duplicable.rb @@ -91,3 +91,13 @@ class BigDecimal # can't dup, so use superclass implementation end end + +class Method + # Methods are not duplicable: + # + # method(:puts).duplicable? # => false + # method(:puts).dup # => TypeError: allocator undefined for Method + def duplicable? + false + end +end diff --git a/activesupport/lib/active_support/core_ext/object/itself.rb b/activesupport/lib/active_support/core_ext/object/itself.rb index adedc20169..d71cea6674 100644 --- a/activesupport/lib/active_support/core_ext/object/itself.rb +++ b/activesupport/lib/active_support/core_ext/object/itself.rb @@ -1,6 +1,9 @@ class Object - unless respond_to?(:itself) # TODO: Remove this file when we drop support for Ruby < 2.2 - # Returns the object itself. Useful when dealing with a chaining scenario, like Active Record scopes: + # TODO: Remove this file when we drop support for Ruby < 2.2 + unless respond_to?(:itself) + # Returns the object itself. + # + # Useful for chaining methods, such as Active Record scopes: # # Event.public_send(state.presence_in([ :trashed, :drafted ]) || :itself).order(:created_at) # diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb index 48190e1e66..31919474ed 100644 --- a/activesupport/lib/active_support/core_ext/object/try.rb +++ b/activesupport/lib/active_support/core_ext/object/try.rb @@ -33,6 +33,11 @@ class Object # ... # end # + # You can also call try with a block without accepting an argument, and the block + # will be instance_eval'ed instead: + # + # @person.try { upcase.truncate(50) } + # # Please also note that +try+ is defined on +Object+, therefore it won't work # with instances of classes that do not have +Object+ among their ancestors, # like direct subclasses of +BasicObject+. For example, using +try+ with @@ -40,7 +45,11 @@ class Object # delegator itself. def try(*a, &b) if a.empty? && block_given? - yield self + if b.arity.zero? + instance_eval(&b) + else + yield self + end else public_send(*a, &b) if respond_to?(a.first) end |