From: Matthew Kerwin <matthew@...>
Date: 2013-04-03T05:56:53+09:00
Subject: [ruby-core:53902] Re: [ruby-trunk - Feature #8191] Short-hand syntax for duck-typing

--f46d04426edadf37bf04d966f91e
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

On Apr 3, 2013 12:03 AM, "rosenfeld (Rodrigo Rosenfeld Rosas)" <
rr.rosas@gmail.com> wrote:
>
> I believe you didn't understand the proposal, Matthew. a??.b would mean
(a.nil? ? nil : a.b). So user.profile??.website??.thumbnail is equivalent
to:
>
> user.profile.nil? ? nil : (user.profile.website.nil? ? nil :
user.profile.website.thumbnail)

You are correct, I thought a.b?? meant (a.respond_to? :b ? a.b : nil) since
I thought I saw earlier something like `foo.empty???=B4

In that case the missing question marks were earlier in the sequence:

    if user??.profile??.website??.thumbnail

--f46d04426edadf37bf04d966f91e
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<p>On Apr 3, 2013 12:03 AM, &quot;rosenfeld (Rodrigo Rosenfeld Rosas)&quot;=
 &lt;<a href=3D"mailto:rr.rosas@gmail.com">rr.rosas@gmail.com</a>&gt; wrote=
:<br>
&gt;<br>
&gt; I believe you didn&#39;t understand the proposal, Matthew. a??.b would=
 mean (a.nil? ? nil : a.b). So user.profile??.website??.thumbnail is equiva=
lent to:<br>
&gt;<br>
&gt; user.profile.nil? ? nil : (user.profile.website.nil? ? nil : user.prof=
ile.website.thumbnail)</p>
<p>You are correct, I thought a.b?? meant (a.respond_to? :b ? a.b : nil) si=
nce I thought I saw earlier something like `foo.empty???=B4</p>
<p>In that case the missing question marks were earlier in the sequence:</p=
>
<p>=A0=A0=A0 if user??.profile??.website??.thumbnail<br>
</p>

--f46d04426edadf37bf04d966f91e--