Results for: "Pathname"

Returns the list of protected methods accessible to obj. If the all parameter is set to false, only those methods in the receiver will be listed.

Returns the list of public methods accessible to obj. If the all parameter is set to false, only those methods in the receiver will be listed.

Similar to method, searches public method only.

Similar to method, searches singleton method only.

class Demo
  def initialize(n)
    @iv = n
  end
  def hello()
    "Hello, @iv = #{@iv}"
  end
end

k = Demo.new(99)
def k.hi
  "Hi, @iv = #{@iv}"
end
m = k.singleton_method(:hi)
m.call   #=> "Hi, @iv = 99"
m = k.singleton_method(:hello) #=> NameError

Invoked as a callback whenever an instance method is added to the receiver.

module Chatty
  def self.method_added(method_name)
    puts "Adding #{method_name.inspect}"
  end
  def self.some_class_method() end
  def some_instance_method() end
end

produces:

Adding :some_instance_method

Invoked as a callback whenever an instance method is removed from the receiver.

module Chatty
  def self.method_removed(method_name)
    puts "Removing #{method_name.inspect}"
  end
  def self.some_class_method() end
  def some_instance_method() end
  class << self
    remove_method :some_class_method
  end
  remove_method :some_instance_method
end

produces:

Removing :some_instance_method

Invoked as a callback whenever an instance method is undefined from the receiver.

module Chatty
  def self.method_undefined(method_name)
    puts "Undefining #{method_name.inspect}"
  end
  def self.some_class_method() end
  def some_instance_method() end
  class << self
    undef_method :some_class_method
  end
  undef_method :some_instance_method
end

produces:

Undefining :some_instance_method

Returns an array containing the names of the public and protected instance methods in the receiver. For a module, these are the public and protected methods; for a class, they are the instance (not singleton) methods. If the optional parameter is false, the methods of any ancestors are not included.

module A
  def method1()  end
end
class B
  include A
  def method2()  end
end
class C < B
  def method3()  end
end

A.instance_methods(false)                   #=> [:method1]
B.instance_methods(false)                   #=> [:method2]
B.instance_methods(true).include?(:method1) #=> true
C.instance_methods(false)                   #=> [:method3]
C.instance_methods.include?(:method2)       #=> true

Note that method visibility changes in the current class, as well as aliases, are considered as methods of the current class by this method:

class C < B
  alias method4 method2
  protected :method2
end
C.instance_methods(false).sort               #=> [:method2, :method3, :method4]

Returns an UnboundMethod representing the given instance method in mod.

class Interpreter
  def do_a() print "there, "; end
  def do_d() print "Hello ";  end
  def do_e() print "!\n";     end
  def do_v() print "Dave";    end
  Dispatcher = {
    "a" => instance_method(:do_a),
    "d" => instance_method(:do_d),
    "e" => instance_method(:do_e),
    "v" => instance_method(:do_v)
  }
  def interpret(string)
    string.each_char {|b| Dispatcher[b].bind(self).call }
  end
end

interpreter = Interpreter.new
interpreter.interpret('dave')

produces:

Hello there, Dave!

Defines an instance method in the receiver. The method parameter can be a Proc, a Method or an UnboundMethod object. If a block is specified, it is used as the method body. If a block or the method parameter has parameters, they’re used as method parameters. This block is evaluated using instance_eval.

class A
  def fred
    puts "In Fred"
  end
  def create_method(name, &block)
    self.class.define_method(name, &block)
  end
  define_method(:wilma) { puts "Charge it!" }
  define_method(:flint) {|name| puts "I'm #{name}!"}
end
class B < A
  define_method(:barney, instance_method(:fred))
end
a = B.new
a.barney
a.wilma
a.flint('Dino')
a.create_method(:betty) { p self }
a.betty

produces:

In Fred
Charge it!
I'm Dino!
#<B:0x401b39e8>

Removes the method identified by symbol from the current class. For an example, see Module#undef_method. String arguments are converted to symbols.

Prevents the current class from responding to calls to the named method. Contrast this with remove_method, which deletes the method from the particular class; Ruby will still search superclasses and mixed-in modules for a possible receiver. String arguments are converted to symbols.

class Parent
  def hello
    puts "In parent"
  end
end
class Child < Parent
  def hello
    puts "In child"
  end
end

c = Child.new
c.hello

class Child
  remove_method :hello  # remove from child, still in parent
end
c.hello

class Child
  undef_method :hello   # prevent any calls to 'hello'
end
c.hello

produces:

In child
In parent
prog.rb:23: undefined method 'hello' for #<Child:0x401b3bb4> (NoMethodError)

Makes new_name a new copy of the method old_name. This can be used to retain access to methods that are overridden.

module Mod
  alias_method :orig_exit, :exit #=> :orig_exit
  def exit(code=0)
    puts "Exiting with code #{code}"
    orig_exit(code)
  end
end
include Mod
exit(99)

produces:

Exiting with code 99

Returns true if the named method is defined by mod. If inherit is set, the lookup will also search mod’s ancestors. Public and protected methods are matched. String arguments are converted to symbols.

module A
  def method1()  end
  def protected_method1()  end
  protected :protected_method1
end
class B
  def method2()  end
  def private_method2()  end
  private :private_method2
end
class C < B
  include A
  def method3()  end
end

A.method_defined? :method1              #=> true
C.method_defined? "method1"             #=> true
C.method_defined? "method2"             #=> true
C.method_defined? "method2", true       #=> true
C.method_defined? "method2", false      #=> false
C.method_defined? "method3"             #=> true
C.method_defined? "protected_method1"   #=> true
C.method_defined? "method4"             #=> false
C.method_defined? "private_method2"     #=> false

Returns a DateTime whose value is the same as self:

Date.new(2001, 2, 3).to_datetime # => #<DateTime: 2001-02-03T00:00:00+00:00>

Returns self.

Returns a DateTime object which denotes self.

Returns true for IPv4-compatible IPv6 address (::/80). It returns false otherwise.

Calls WIN32OLE#invoke method.

Returns the array of WIN32OLE::Method object. The element is OLE method of WIN32OLE object.

excel = WIN32OLE.new('Excel.Application')
methods = excel.ole_methods

Returns WIN32OLE::Method object corresponding with method specified by 1st argument.

excel = WIN32OLE.new('Excel.Application')
method = excel.ole_method_help('Quit')

Invoked by Ruby when obj is sent a message it cannot handle. symbol is the symbol for the method called, and args are any arguments that were passed to it. By default, the interpreter raises an error when this method is called. However, it is possible to override the method to provide more dynamic behavior. If it is decided that a particular method should not be handled, then super should be called, so that ancestors can pick up the missing method. The example below creates a class Roman, which responds to methods with names consisting of roman numerals, returning the corresponding integer values.

class Roman
  def roman_to_int(str)
    # ...
  end

  def method_missing(symbol, *args)
    str = symbol.id2name
    begin
      roman_to_int(str)
    rescue
      super(symbol, *args)
    end
  end
end

r = Roman.new
r.iv      #=> 4
r.xxiii   #=> 23
r.mm      #=> 2000
r.foo     #=> NoMethodError

Returns the methods available to this delegate object as the union of this object’s and _getobj_ public methods.

Returns the methods available to this delegate object as the union of this object’s and _getobj_ protected methods.