From: Eric Hodel <drbrain@...7.net>
Date: 2007-10-11T16:11:33+09:00
Subject: Re: what does print call internally?


On Oct 10, 2007, at 19:52 , Joel VanderWerf wrote:

> Eric Hodel wrote:
>> On Oct 10, 2007, at 15:31 , Martin DeMello wrote:
>>> irb(main):001:0> puts nil
>>> nil
>>> => nil
>>> irb(main):002:0> print nil
>>> nil=> nil
>>> irb(main):003:0> class NilClass
>>> irb(main):004:1> def inspect
>>> irb(main):005:2> "foo"
>>> irb(main):006:2> end
>>> irb(main):007:1> end
>>> => foo
>> it calls #to_s.
>
> Hm. What's going on here then:
>
> $ ruby -e 'p nil.to_s'
> ""
> $ ruby -e 'print nil'
> nil

         switch (TYPE(argv[i])) {
           case T_NIL:
             rb_io_write(out, rb_str_new2("nil"));
             break;
           default:
             rb_io_write(out, argv[i]);
             break;
         }

--
Poor workers blame their tools. Good workers build better tools. The
best workers get their tools to do the work for them. -- Syndicate Wars