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Groups > comp.lang.ruby > #3653

Re: Is everything object ?

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Josh Cheek wrote in post #995509:
> There are only three _relevant_ things that I can think of right now
> that
> aren't objects. Let us say that a thing is relevant as a nonobject if it
> means you can't manipulate it like an object (ie pass it as an argument,
> store it in a variable, and call methods on it). The first is boolean
> methods like "&&" and "||", the second is keywords like "class", and
> "def",
> the third is variables, which point to objects but are not objects
> themselves, thus cannot be pointed to by other variables.

I think it's reasonable to say that most operators in Ruby are in fact 
syntactic sugar for method calls; so are some other syntactic 
constructions like a[b] and a[b] = c. All these can be invoked 
equivalently using send, e.g.

a.send(:[]=, b, c)

However the assignment operators =, +=, -= etc are *not* mapped to 
method calls, in addition to the short-circuit boolean operators as 
you've already pointed out.

It's perhaps also worth mentioning that literals don't invoke method 
calls; e.g. "foo" and /foo/ can't be intercepted by redefining 
String.new or Regexp.new

-- 
Posted via http://www.ruby-forum.com/.

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Is everything object ? "amir e." <aef1370@gmail.com> - 2011-04-28 04:48 -0500
  Re: Is everything object ? Urabe Shyouhei <shyouhei@ruby-lang.org> - 2011-04-28 04:56 -0500
  Re: Is everything object ? Robert Klemme <shortcutter@googlemail.com> - 2011-04-28 04:59 -0500
  Re: Is everything object ? Roger Braun <roger@rogerbraun.net> - 2011-04-28 04:54 -0500
  Re: Is everything object ? Josh Cheek <josh.cheek@gmail.com> - 2011-04-28 06:52 -0500
    Re: Is everything object ? Roger Braun <roger@rogerbraun.net> - 2011-04-28 10:26 -0500
      Re: Is everything object ? Michael Sokol <mikaa123@gmail.com> - 2011-04-28 10:49 -0500
    Re: Is everything object ? Josh Cheek <josh.cheek@gmail.com> - 2011-04-28 12:23 -0500
      Re: Is everything object ? Josh Cheek <josh.cheek@gmail.com> - 2011-04-28 18:39 -0500
        Re: Is everything object ? Josh Cheek <josh.cheek@gmail.com> - 2011-04-28 23:09 -0500
          Re: Is everything object ? Josh Cheek <josh.cheek@gmail.com> - 2011-04-29 18:01 -0500
    Re: Is everything object ? Brian Candler <b.candler@pobox.com> - 2011-04-28 15:22 -0500
      Re: Is everything object ? Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-28 15:36 -0500
  Re: Is everything object ? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 11:54 -0500
    Re: Is everything object ? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-28 18:50 -0500
  Re: Is everything object ? Stu <stu@rubyprogrammer.net> - 2011-04-28 14:43 -0500
  Re: Is everything object ? Justin Collins <justincollins@ucla.edu> - 2011-04-28 23:37 -0500

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