why does a ruby method have itself as method -

def moo    puts "moo" end  moo.moo.moo.moo 

this gives

moo moo moo moo 

just oddity, curious if done on purpose , served purpose...

i'm guessing you're doing in console, you're defining method on object, defines method on children of object... everything. method:

def moo   puts "moo" end 

returns nil, , because defined method on object, nilclass has method well, can call moo on nilclass.

if do:

class foo   def bar     1 + 1   end end 

and then:

f = foo.new f.bar.bar 

you get:

nomethoderror: undefined method `bar' 2:fixnum