diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object/inclusion.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/object/inclusion.rb | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/inclusion.rb b/activesupport/lib/active_support/core_ext/object/inclusion.rb index 3fec465ec0..55f281b213 100644 --- a/activesupport/lib/active_support/core_ext/object/inclusion.rb +++ b/activesupport/lib/active_support/core_ext/object/inclusion.rb @@ -1,25 +1,27 @@ class Object - # Returns true if this object is included in the argument(s). Argument must be - # any object which responds to +#include?+ or optionally, multiple arguments can be passed in. Usage: + # Returns true if this object is included in the argument. Argument must be + # any object which responds to +#include?+. Usage: # - # characters = ['Konata', 'Kagami', 'Tsukasa'] - # 'Konata'.in?(characters) # => true + # characters = ["Konata", "Kagami", "Tsukasa"] + # "Konata".in?(characters) # => true # - # character = 'Konata' - # character.in?('Konata', 'Kagami', 'Tsukasa') # => true - # - # This will throw an ArgumentError if a single argument is passed in and it doesn't respond + # This will throw an ArgumentError if the argument doesn't respond # to +#include?+. - def in?(*args) - if args.length > 1 - args.include? self - else - another_object = args.first - if another_object.respond_to? :include? - another_object.include? self - else - raise ArgumentError.new 'The single parameter passed to #in? must respond to #include?' - end - end + def in?(another_object) + another_object.include?(self) + rescue NoMethodError + raise ArgumentError.new("The parameter passed to #in? must respond to #include?") + end + + # Returns the receiver if it's included in the argument otherwise returns +nil+. + # Argument must be any object which responds to +#include?+. Usage: + # + # params[:bucket_type].presence_in %w( project calendar ) + # + # This will throw an ArgumentError if the argument doesn't respond to +#include?+. + # + # @return [Object] + def presence_in(another_object) + self.in?(another_object) ? self : nil end end |