Class: Object

Inherits:
BasicObject
Defined in:
lib/clevic/extensions.rb,
lib/clevic/subclasses.rb

Overview

copied from snippets.dzone.com/posts/show/2992

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.subclasses(direct = false) ⇒ Object

return a list of the subclasses of a class from Matt Williams matthewkwilliams.com/index.php/2008/08/22/rubys-objectspace-subclasses/



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# File 'lib/clevic/extensions.rb', line 21

def self.subclasses(direct = false)
  classes = []
  if direct
    ObjectSpace.each_object(Class) do |c|
      next unless c.superclass == self
      classes << c
    end
  else
    ObjectSpace.each_object(Class) do |c|
      next unless c.ancestors.include?(self) and (c != self)
      classes << c
    end
  end
  classes
end

Instance Method Details

#evaluate_path(path_ary) ⇒ Object

recursively calls each entry in path_ary will return nil if any entry in path_ary results in a nil value.



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# File 'lib/clevic/extensions.rb', line 7

def evaluate_path( path_ary )
  path_ary.inject( self ) do |value, att|
    value.nil? ? nil : value.send( att )
  end
end

#with {|_self| ... } ⇒ Object

pass self to the block and return the results of the block.

Yields:

  • (_self)

Yield Parameters:

  • _self (Object) —

    the object that the method was called on



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# File 'lib/clevic/extensions.rb', line 14

def with( &block )
  yield( self )
end