From: "mrkn (Kenta Murata)" <muraken@...>
Date: 2013-06-06T16:28:39+09:00
Subject: [ruby-core:55334] [ruby-trunk - Feature #8499] Importing Hash#slice, Hash#slice!, Hash#except, and Hash#except! from ActiveSupport


Issue #8499 has been updated by mrkn (Kenta Murata).


zzak (Zachary Scott) wrote:
> Hello,
>  
>  On Thu, Jun 6, 2013 at 4:12 PM, mrkn (Kenta Murata) <muraken@gmail.com> wrote:
>  > On Rails, they can be written in the following forms by using ActiveSupport's features.
>  >
>  > (1) (({hash = other_hash.slice(:key1, :key2, :key3)}))
>  > (2) (({hash = other_hash.reject(:key1, :key2, :key3}}))
>  
>  Do you mean "other_hash.except(...)"? There is already Hash#reject

Yes, It's my mistake!

How can I edit the issue description?
----------------------------------------
Feature #8499: Importing Hash#slice, Hash#slice!, Hash#except, and Hash#except! from ActiveSupport
https://bugs.ruby-lang.org/issues/8499#change-39741

Author: mrkn (Kenta Murata)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: current: 2.1.0


=begin RD
According to my experiences, the following two idioms often appeare in application codes.

(1) (({hash = other_hash.select { |k, | [:key1, :key2, :key3].include? k }}))
(2) (({hash = other_hash.reject { |k, | [:key1, :key2, :key3].include? k }}))

On Rails, they can be written in the following forms by using ActiveSupport's features.

(1) (({hash = other_hash.slice(:key1, :key2, :key3)}))
(2) (({hash = other_hash.reject(:key1, :key2, :key3)}))

I think the latter forms are shorter and more readable than the former ones.

So I propose to import the following methods from ActiveSupport:

* (({Hash#slice}))
* (({Hash#slice!}))
* (({Hash#except}))
* (({Hash#except!}))
=end


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