| Module | ActiveSupport::CoreExtensions::Hash::Slice |
| In: |
vendor/rails/activesupport/lib/active_support/core_ext/hash/slice.rb
|
Slice a hash to include only the given keys. This is useful for limiting an options hash to valid keys before passing to a method:
def search(criteria = {})
assert_valid_keys(:mass, :velocity, :time)
end
search(options.slice(:mass, :velocity, :time))
Returns a new hash with only the given keys.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/slice.rb, line 16
16: def slice(*keys)
17: allowed = Set.new(respond_to?(:convert_key) ? keys.map { |key| convert_key(key) } : keys)
18: reject { |key,| !allowed.include?(key) }
19: end