From: rr.rosas@...
Date: 2015-10-26T13:58:58+00:00
Subject: [ruby-core:71190] [Ruby trunk - Feature #11537] Introduce "Safe	navigation operator"

Issue #11537 has been updated by Rodrigo Rosenfeld Rosas.


Yehuda Katz wrote:
> As shorthand for:
> 
> ~~~
> u && u.profile && u.profile.thumbnails && u.profile.thumbnails.large
> ~~~

Actually, it would be a shorthand for something like:

~~~
u && (tmp1 = u.profile) && (tmp2 = tmp1.thumbnails) && tmp2.large
~~~

But I still prefer the syntax implemented in trunk as it's similar to other languages and will be more familiar for those used to the operator in Groovy and CoffeeScript, for example.

----------------------------------------
Feature #11537: Introduce "Safe navigation operator"
https://bugs.ruby-lang.org/issues/11537#change-54569

* Author: Hiroshi SHIBATA
* Status: Closed
* Priority: Normal
* Assignee: Yukihiro Matsumoto
----------------------------------------
I sometimes write following code with rails application:

```ruby
u = User.find(id)
if u && u.profile && u.profile.thumbnails && u.profiles.thumbnails.large
  ...
```

or

```ruby
# Use ActiveSupport
if u.try!(:profile).try!(:thumbnails).try!(:large)
 ...
```
I hope to write shortly above code. Groovy has above operator named "Safe navigation operator" with "`?.`" syntax.
Ruby can't use "`?.`" operator.

Can we use "`.?`" syntax. like this:

```ruby
u = User.find(id)
u.?profile.?thumbnails.?large
```

Matz. How do you think about this?




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