Class name methods

ruby-talk
1

Hey Ruby-Talk,
I've got this:
class H

end

def H(a)
  p a
end
H H

I was wondering how Ruby handles this? I know it works, but *how*?
:slight_smile:

j`ey
http://www.eachmapinject.com
Ergh C(http://code.eachmapinject.com/mountain_signature.c):

char n='#',f=' ';main(){char a[]={f,f,f,f,f,'\0'};
printf("\e[2J\e[H");char *t=a;int i=0,c=i;end:for(
;(c==0?i++<6:i-->0);){c?*t--=f:(*t++=n);printf("%s\
\n",a);usleep(200000);};if(c==0){i=6;c=1;goto end;}}

2

Joey schrieb:

Hey Ruby-Talk,
I've got this:
class H

end

def H(a)
p a
end
H H

I was wondering how Ruby handles this? I know it works, but *how*?

Ruby has different namespaces for methods and constants, so you can create both a constant "H" and a method "H". When parsing the expression

   H H

Ruby notices that the first "H" is followed by a parameter, so Ruby chooses the *method* "H". The second "H" doesn't have a parameter, so Ruby chooses the *constant* "H".

BTW, you can also do the same with methods and local variables:

   v = "v"

   def v(a)
     p a
   end

   v v # => "v"

Note also the following error messages:

   x y # => undefined local variable or method `y'

and

   y = 1
   x y # => undefined method `x'

Here you see that "x" can only be a method, whereas "y" could be a local variable or a method.

Regards,
Pit