How to create random object to a particular ruby object?

ruby-talk
21

Hi,

···

----- Original Message -----
From: "Michael Fellinger" <m.fellinger@gmail.com>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Friday, April 11, 2008 10:28 PM
Subject: Re: how to create random object to a particular ruby object ?

On Fri, Apr 11, 2008 at 3:16 PM, Robert Dober <robert.dober@gmail.com> wrote:

On Fri, Apr 11, 2008 at 2:39 PM, David A. Black <dblack@rubypal.com> wrote:
> Hi --
>

...

> :"&&"

No David
irb(main):017:0* x=:&
irb(main):018:0* 15.send x, 8
=> 8
irb(main):019:0>

The simple "problem" is that I believed for 3 years that &&, ||, :and
and :or where methods (of Object), which they are not :frowning:
irb(main):020:0* 15.send("&&", 42)
NoMethodError: undefined method `&&' for 15:Fixnum
        from (irb):20:in `send'
        from (irb):20
        from :0

and unless somebody can point out a good reason why that is like that
I am really tempted to make a RCR for 1.9.
Opinions?

Thx in advance
Robert

Because the use of these operators is that in some cases you don't
want the right hand to evaluate.
result = long_operation or other_long_operation

stops evaluating after the first one returns non-nil/false

I don't think so.
If you're correct, what's your explanation of the following:

irb(main):001:0> 15.send("||",42)
NoMethodError: undefined method `||' for 15:Fixnum
        from (irb):1:in `send'
        from (irb):1

&& or || is not a method but an operator.
You cannot use send for the operator.

Regards,

Park Heesob

22

I guess that this is the reason of which I fail to see the reason, but
that is not an important issue to me.
For me it was important to got explained why && was not a method,
which has been nicely accomplished in the meantime.

Cheers
Robert

···

On Fri, Apr 11, 2008 at 4:25 PM, David A. Black <dblack@rubypal.com> wrote:

& isn't an operator, though; it's a method. I don't know whether
that's actually why there's the difference with regard to symbol-izing
them, but I think it does at least mostly fall along those lines.