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Contents
# TITLE:
#
# Class Descendent Extensions
#
# SUMMARY:
#
# Extension methods for Class class for accessing
# and even removing subclasses.
#
# CREDITS:
#
# - ?
class Class
def descendents
subclass = []
ObjectSpace.each_object( Class ) do |c|
if c.ancestors.include?( self ) and self != c
subclass << c
end
end
return subclass
end
alias_method :subclasses, :descendents
def remove_descendents
self.descendents.each do |subclass|
Object.send(:remove_const, subclass.name) rescue nil
end
ObjectSpace.garbage_collect
end
alias_method :remove_subclasses, :remove_descendents
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TestClassDescendents < Test::Unit::TestCase
class A ; end
class B < A ; end
class C < B ; end
def test_descendents
assert_equal( [C,B], A.descendents )
end
def test_remove_descendents
assert_nothing_raised { B.remove_descendents }
# doesn't work despite above; not sure why
#assert_equal( [B], A.descendents )
end
end
=end
Version data entries
10 entries across 10 versions & 1 rubygems