Feature #8499
Updated by nobu (Nobuyoshi Nakada) over 11 years ago
=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)})) :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