Feature #8499
Updated by nobu (Nobuyoshi Nakada) almost 10 years ago
=begin RD According to my experiences, the following two idioms often appeare in application codes. 1. `hash (1) (({hash = other_hash.select { |k, | [:key1, :key2, :key3].include? k }` }})) 2. `hash (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 (1) (({hash = other_hash.slice(:key1, :key2, :key3)` :key3)})) 2. `hash (2) (({hash = other_hash.except(: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#slice!` (({Hash#slice!})) * `Hash#except` (({Hash#except})) * `Hash#except!` (({Hash#except!})) =end