Same as above, except in Object.

Methods
Included Modules
Public Class methods
find_hidden_method(name)

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/vendor/builder-2.1.2/blankslate.rb, line 90
90:     def find_hidden_method(name)
91:       nil
92:     end
lookup_missing_generator(class_id)

Lookup missing generators using const_missing. This allows any generator to reference another without having to know its location: RubyGems, ~/.rails/generators, and RAILS_ROOT/generators.

[ show source ]

    # File vendor/rails/railties/lib/rails_generator/lookup.rb, line 10
10:     def lookup_missing_generator(class_id)
11:       if md = /(.+)Generator$/.match(class_id.to_s)
12:         name = md.captures.first.demodulize.underscore
13:         Rails::Generator::Base.lookup(name).klass
14:       else
15:         const_missing_before_generators(class_id)
16:       end
17:     end
method_added(name)

Detect method additions to Object and remove them in the BlankSlate class.

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/vendor/builder-2.1.2/blankslate.rb, line 83
83:     def method_added(name)
84:       result = blank_slate_method_added(name)
85:       return result if self != Object
86:       BlankSlate.hide(name)
87:       result
88:     end
Public Instance methods
acts_like?(duck)

A duck-type assistant method. For example, Active Support extends Date to define an acts_like_date? method, and extends Time to define acts_like_time?. As a result, we can do "x.acts_like?(:time)" and "x.acts_like?(:date)" to do duck-type-safe comparisons, since classes that we want to act like Time simply need to define an acts_like_time? method.

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/misc.rb, line 71
71:   def acts_like?(duck)
72:     respond_to? "acts_like_#{duck}?"
73:   end
blank?()

An object is blank if it‘s false, empty, or a whitespace string. For example, "", " ", nil, [], and {} are blank.

This simplifies 

  if !address.nil? && !address.empty?

to 

  if !address.blank?

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/blank.rb, line 12
12:   def blank?
13:     respond_to?(:empty?) ? empty? : !self
14:   end
class_eval(*args, &block)

If class_eval is called on an object, add those methods to its metaclass

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/metaclass.rb, line 10
10:   def class_eval(*args, &block)
11:     metaclass.class_eval(*args, &block)
12:   end
duplicable?()

Can you safely .dup this object? False for nil, false, true, symbols, and numbers; true otherwise.

[ show source ]

   # File vendor/rails/activesupport/lib/active_support/core_ext/duplicable.rb, line 4
4:   def duplicable?
5:     true
6:   end
instance_exec(*args, &block)

Evaluate the block with the given arguments within the context of this object, so self is set to the method receiver.

From Mauricio‘s eigenclass.org/hiki/bounded+space+instance_exec

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/extending.rb, line 63
63:     def instance_exec(*args, &block)
64:       begin
65:         old_critical, Thread.critical = Thread.critical, true
66:         n = 0
67:         n += 1 while respond_to?(method_name = "__instance_exec#{n}")
68:         InstanceExecMethods.module_eval { define_method(method_name, &block) }
69:       ensure
70:         Thread.critical = old_critical
71:       end
72: 
73:       begin
74:         send(method_name, *args)
75:       ensure
76:         InstanceExecMethods.module_eval { remove_method(method_name) } rescue nil
77:       end
78:     end
instance_variable_defined?(variable)

[ show source ]

   # File vendor/rails/activesupport/lib/active_support/core_ext/object/instance_variables.rb, line 4
4:     def instance_variable_defined?(variable)
5:       instance_variables.include?(variable.to_s)
6:     end
instance_variable_names()

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/instance_variables.rb, line 37
37:     def instance_variable_names
38:       instance_variables.map { |var| var.to_s }
39:     end
metaclass()

Get object‘s meta (ghost, eigenclass, singleton) class

[ show source ]

   # File vendor/rails/activesupport/lib/active_support/core_ext/object/metaclass.rb, line 3
3:   def metaclass
4:     class << self
5:       self
6:     end
7:   end
present?()

An object is present if it‘s not blank.

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/blank.rb, line 17
17:   def present?
18:     !blank?
19:   end
returning(value) {|value| ...}

Returns value after yielding value to the block. This simplifies the process of constructing an object, performing work on the object, and then returning the object from a method. It is a Ruby-ized realization of the K combinator, courtesy of Mikael Brockman.

Examples

 # Without returning
 def foo
   values = []
   values << "bar"
   values << "baz"
   return values
 end

 foo # => ['bar', 'baz']

 # returning with a local variable
 def foo
   returning values = [] do
     values << 'bar'
     values << 'baz'
   end
 end

 foo # => ['bar', 'baz']

 # returning with a block argument
 def foo
   returning [] do |values|
     values << 'bar'
     values << 'baz'
   end
 end

 foo # => ['bar', 'baz']

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/misc.rb, line 38
38:   def returning(value)
39:     yield(value)
40:     value
41:   end
to_json(options = {})

Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info.

[ show source ]

   # File vendor/rails/activesupport/lib/active_support/json/encoders/object.rb, line 3
3:   def to_json(options = {})
4:     ActiveSupport::JSON.encode(instance_values, options)
5:   end
to_param()

[ show source ]

   # File vendor/rails/actionpack/lib/action_controller/routing/routing_ext.rb, line 2
2:   def to_param
3:     to_s
4:   end
to_param()

Alias of to_s.

[ show source ]

   # File vendor/rails/activesupport/lib/active_support/core_ext/object/conversions.rb, line 3
3:   def to_param
4:     to_s
5:   end
to_query(key)

Converts an object into a string suitable for use as a URL query string, using the given key as the param name.

Note: This method is defined as a default implementation for all Objects for Hash#to_query to work.

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/conversions.rb, line 11
11:   def to_query(key)
12:     "#{CGI.escape(key.to_s)}=#{CGI.escape(to_param.to_s)}"
13:   end
with_options(options) {|ActiveSupport::OptionMerger.new(self, options)| ...}

An elegant way to factor duplication out of options passed to a series of method calls. Each method called in the block, with the block variable as the receiver, will have its options merged with the default options hash provided. Each method called on the block variable must take an options hash as its final argument. 

  with_options :order => 'created_at', :class_name => 'Comment' do |post|
    post.has_many :comments, :conditions => ['approved = ?', true], :dependent => :delete_all
    post.has_many :unapproved_comments, :conditions => ['approved = ?', false]
    post.has_many :all_comments
  end

Can also be used with an explicit receiver: 

  map.with_options :controller => "people" do |people|
    people.connect "/people",     :action => "index"
    people.connect "/people/:id", :action => "show"
  end

[ show source ]

    # File vendor/rails/activesupport/lib/active_support/core_ext/object/misc.rb, line 62
62:   def with_options(options)
63:     yield ActiveSupport::OptionMerger.new(self, options)
64:   end