[ruby-core:54102] Re: [ruby-trunk - Feature #8237] Logical method chaining via inferred receiver

On Apr 8, 2013 10:39 PM, "rosenfeld (Rodrigo Rosenfeld Rosas)" <
[e-mail]> wrote:
>
> I really believe it would be better to isolate each wanted feature in a
separate ticket instead of mixing several ideas in the same ticket. Also, I
guess you should state clearly that a&&.b&&.c should mean (tmp1 = a; tmp1
&& (tmp2 = tmp1.b); tmp2 && tmp2.c), meaning that each method should be
evaluated just once in the chain.
>
> Anyway, I'm -1 for this proposal (with the implementation above) because
it doesn't make any sense to me to call any method on the "false" object in
most real-world codes out there. I'm favorable to adding a shortcut syntax
for chaining methods, but I believe it should check for "nil?" only. I
don't have an opinion yet if it should abort the entire statement if a
subexpression is nil, like CoffeeScript does, or simply replace the
subexpression with "nil" and let the expression go on with the evaluation,
like Groovy does.

I think you've missed the point of this request. There is only one wanted
feature, and it has nothing to do with "checking for nil", except that it
can be used to simplify a common pattern already employed for that purpose.

Note that this one also theoretically allows such constructs as:

    foo[bar] || .inspect
    baz if .empty?

or

    "41" << .to_i(16).chr  #=> "41A"

Strange examples, but possible nonetheless.