Class: Object

Inherits:
BasicObject
Defined in:
lib/kitchensink/patches/object.rb,
lib/kitchensink/patches/object.rb,
lib/kitchensink/patches/object.rb,
lib/kitchensink/patches/object.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.class_method(name) ⇒ Object

Returns an UnboundMethod representing a given class method in a class.

See Also: instance_method

Examples:

sc = String.class_method(:superclass)
sc.bind(String).call()
=> Object

– Note that here we use the “class << self; self; end.send” trick, which gives us access to the singleton class rather than the class itself. Setting instance methods here causes the subclass to receive class methods. Yay!



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# File 'lib/kitchensink/patches/object.rb', line 16

def self.class_method(name)
  class << self; self; end.send :instance_method, name
end

.define_class_method(name, method = nil, &block) ⇒ Object

Works like define_method, only creates a class method.

  • define_class_method(symbol, method) => new_method

  • define_class_method(symbol) {block} => proc

Examples:

String.define_class_method :get_parent_class, String.class_method(:superclass)
String.define_class_method :make_runon do |str, num|
  String.new(str) * num
end
String.make_runon "abc", 3
=> "abcabcabc"



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# File 'lib/kitchensink/patches/object.rb', line 35

def self.define_class_method(name, method=nil, &block)
  if method
    class << self; self; end.send :define_method, name, method
  else
    class << self; self; end.send :define_method, name, &block
  end
end

.remove_class_method(name) ⇒ Object

Removes a class method.



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# File 'lib/kitchensink/patches/object.rb', line 61

def self.remove_class_method(name)
  class << self; self; end.send :remove_method, name
end

Instance Method Details

#included_in?(collection) ⇒ Boolean

True if a collection includes this object.

Note: I wrote this because sometimes collection.include?(object) violates left-to-right reading order, such as when object is more important than the collection.

Returns:

  • (Boolean) 


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# File 'lib/kitchensink/patches/object.rb', line 52

def included_in?(collection)
  collection.include? self
end