From: "jeremyevans0 (Jeremy Evans)" <noreply@...>
Date: 2021-10-06T17:19:56+00:00
Subject: [ruby-core:105572] [Ruby master Feature#6414] Destructuring Assignment

Issue #6414 has been updated by jeremyevans0 (Jeremy Evans).

Status changed from Feedback to Closed

This proposal has basically been implemented, with single-line pattern matching and valueless hash creation syntax:

```ruby
john = {name: "John", last: "Smith"}
john => {name:, last:}
name # => "John"
last # => "Smith"
p({name:, last:})
```

----------------------------------------
Feature #6414: Destructuring Assignment 
https://bugs.ruby-lang.org/issues/6414#change-94029

* Author: edtsech (Edward Tsech)
* Status: Closed
* Priority: Normal
----------------------------------------
I mean:

john = {name: "John", last: "Smith"}
{name, last} = john # extract value by key from the hash and set to local variable with same name
name # => "John"
last # -> "Smith"

Useful for ex. for  "options" hashes:
def select(options={})
  {only, except} = options
  ...
end

As extra part of this feature can be hash constructing in this way:

name = "John"
last    = "Smith"
find({name, last}) # equals to => find({name: "John", last: "Smith"})

I think both really nice to have in Ruby.
Thanks.

---Files--------------------------------
destructuring.pdf (128 KB)


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