ruby - respond_to?() from top level of script -

i can use respond_to?() main object in irb:

irb(main):001:0> def foo irb(main):002:1>   "hi" irb(main):003:1> end => nil irb(main):004:0> respond_to?(:foo) => true irb(main):005:0> self => main 

but when put script, doesn't seem work i'd expect:

$ cat test.rb #! /usr/local/bin/ruby def foo   "hi" end puts respond_to?(:foo) puts self  $ ./test.rb false main 

what's going on here?

edit:

the irb behavior works me in 1.9.3, not in 2.2.0. regardless, possible use respond_to?() such script?

as alternative, can catch nomethoderror call send(), catch such exceptions inside valid method well, makes error handling little convoluted.

methods defined @ top level made private methods of object , default respond_to? returns true public methods. check private , protected methods, set include_all argument true:

def foo   "hi" end   puts respond_to?(:foo, true) puts self 

now when script run, respond_to?(:foo, true) should return true:

$ ./test.rb true main