From: "cvss (Kirill Vechera)" <noreply@...>
Date: 2021-12-02T13:52:03+00:00
Subject: [ruby-core:106391] [Ruby master Feature#18369] users.detect(:name, "Dorian") as shorthand for users.detect { |user| user.name == "Dorian" }

Issue #18369 has been updated by cvss (Kirill Vechera).


It's a good occasion to use the composition of Proc/Method objects:

``` ruby
collection.detect(&:first_name.to_proc>>"Dorian".method(:==))
```

If we had a shorthand operator for Object#method (#12125), it would look nicer:

``` ruby
collection.detect(:first_name.to_proc >> "Dorian".:==)
```

And if we make a shorthand `Symbol#>>` for the composition of a Symbol and a Proc, it would look even wonderful:

``` ruby
class Symbol
  def >> b
    to_proc >> b
  end
end

collection.detect(&:first_name>>"Dorian".:==)

```

When you are frequently using such constructions you can read it easily, but it is definitely more confusing comparing to the plain variant

``` ruby
collection.detect{_1.first_name == "Dorian"}
```


----------------------------------------
Feature #18369: users.detect(:name, "Dorian") as shorthand for users.detect { |user| user.name == "Dorian" }
https://bugs.ruby-lang.org/issues/18369#change-95029

* Author: dorianmariefr (Dorian Mari��)
* Status: Open
* Priority: Normal
----------------------------------------
Hi,

I was thinking I often do things like `collection.detect { |item| item.attribute == value }` and a shorthand like `collection.detect(:attribute, value)` would be quite useful

What do you think?

And I know there is `collection.detect { _1.attribute == value }` but I try not to use `_1` and this syntax would be shorter and simpler

Could also apply to other methods like `all?` (`collection.all?(:attribute, value)`), and basically any Enumerable method https://rubydoc.info/stdlib/core/Enumerable



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