From: "Martin J. Dürst" <duerst@...>
Date: 2011-01-20T13:00:02+09:00
Subject: [ruby-core:34639] Re: Ruby operator equivalent to Groovy's "?."

I have definitely had cases where such a feature would have been very 
handy. I don't think it's worth a special syntax, but having a dedicated 
method in Ruby core, even if the name is longer than two letters, would 
be very helpful.

Regards,   Martin.

On 2011/01/20 9:27, Rodrigo Rosenfeld Rosas wrote:
> One of the few things I like in Groovy that Ruby doesn't support is the
> '?.' operator. For instance:
>
> obj?.somePropertyName?.anotherGreatPropertyName?.anotherOne
>
> This is the same as:
>
> (obj == null ? null : (obj.somePropertyName == null ? null :
> (obt.somePropertyName.anotherGreatPropertyName == null ? null :
> obt.somePropertyName.anotherGreatPropertyName.anotherOne)))
>
> Unfortunately, this name cannot be used by Ruby since it accepts '?' as
> part of a method name. I've seen some framework that declares a '_?'
> method for doing this like 'obj._?.some_method._?.another_method'.
>
> I'm not sure what syntax would fit better for Ruby. I don't even know if
> this is something the Ruby community is interested in as well, so I'd
> like to hear your opinions on this feature.
>
> Regards, Rodrigo.
>

-- 
#-# Martin J. D�rst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp   mailto:duerst@it.aoyama.ac.jp