Sha256: 06d1ab8d151e4e4486db269a5e590ae97ac03516c92f508a67f84e58ba8f6f24
Contents?: true
Size: 1.04 KB
Versions: 4
Compression:
Stored size: 1.04 KB
Contents
class Class
# List all descedents of this class.
#
# class X ; end
# class A < X; end
# class B < X; end
# X.descendents #=> [A,B]
#
# You may also limit the generational distance
# the subclass may be from the parent class.
#
# class X ; end
# class A < X; end
# class B < A; end
# X.descendents #=> [A, B]
# X.descendents(1) #=> [A]
#
# NOTE: This is a intensive operation. Do not
# expect it to be super fast.
def descendants(generations=nil)
subclass = []
ObjectSpace.each_object(Class) do |c|
ancestors = c.ancestors[0..(generations || -1)]
if ancestors.include?(self) and self != c
subclass << c
end
end
return subclass
end
#
alias_method :descendents, :descendants
unless defined?(::ActiveSupport)
# Obvious alias for descendants.
#
# NOTE: ActiveSupport returns string names rather
# then actual classes, so this is excluded
# if ActiveSupport has already been loaded.
alias_method :subclasses, :descendants
end
end
Version data entries
4 entries across 4 versions & 1 rubygems