From: "marcandre (Marc-Andre Lafortune)" <ruby-core@...>
Date: 2012-07-01T06:27:51+09:00
Subject: [ruby-core:46019] [ruby-trunk - Feature #6414] Destructuring Assignment


Issue #6414 has been updated by marcandre (Marc-Andre Lafortune).

File destructuring.pdf added
Category set to core
Target version set to 2.0.0

Attaching a one-minute slide. It doesn't cover the "construction" part of this request though.
----------------------------------------
Feature #6414: Destructuring Assignment 
https://bugs.ruby-lang.org/issues/6414#change-27623

Author: edtsech (Edward Tsech)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: 2.0.0


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.


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