Trans
2/5/2007 10:53:00 PM
On Feb 5, 3:23 pm, ara.t.how...@noaa.gov wrote:
> harp:~ > cat a.rb
> class Module
> def nesting
> parent, child = nil
> name.split('::').inject(Object){|parent, child| parent.const_get child}
> Object == parent ? nil : parent
> end
> end
>
> class A
> class B
> class C
> class D
> end
> end
> end
> end
>
> p A.nesting
> p A::B.nesting
> p A::B::C.nesting
> p A::B::C::D.nesting
>
> harp:~ > ruby a.rb
> nil
> A
> A::B
> A::B::C
irb(main):001:0> require 'facets/core/module/nesting'
=> true
irb(main):002:0> class A
irb(main):003:1> class B
irb(main):004:2> class C
irb(main):005:3> class D
irb(main):006:4> end
irb(main):007:3> end
irb(main):008:2> end
irb(main):009:1> end
=> nil
irb(main):010:0> A.nesting
=> [A]
irb(main):011:0> B.nesting
NameError: uninitialized constant B
from (irb):11
from :0
irb(main):012:0> A::B.nesting
=> [A, A::B]
irb(main):013:0> A::B::C.nesting
=> [A, A::B, A::B::C]
irb(main):014:0> A::B::C::D.nesting
=> [A, A::B, A::B::C, A::B::C::D]
class Module
def nesting
n = []
name.split(/::/).inject(self){ |mod, name| c =
mod.const_get(name) ; n << c ; c }
return n
end
end
T.