diff options
Diffstat (limited to 'activesupport/lib/active_support/hash_with_indifferent_access.rb')
| -rw-r--r-- | activesupport/lib/active_support/hash_with_indifferent_access.rb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb index 1927cddf34..3b185dd86b 100644 --- a/activesupport/lib/active_support/hash_with_indifferent_access.rb +++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb @@ -195,6 +195,19 @@ module ActiveSupport indices.collect { |key| self[convert_key(key)] } end + # Returns an array of the values at the specified indices, but also + # raises an exception when one of the keys can't be found. + # + # hash = ActiveSupport::HashWithIndifferentAccess.new + # hash[:a] = 'x' + # hash[:b] = 'y' + # hash.fetch_values('a', 'b') # => ["x", "y"] + # hash.fetch_values('a', 'c') { |key| 'z' } # => ["x", "z"] + # hash.fetch_values('a', 'c') # => KeyError: key not found: "c" + def fetch_values(*indices, &block) + indices.collect { |key| fetch(key, &block) } + end if Hash.method_defined?(:fetch_values) + # Returns a shallow copy of the hash. # # hash = ActiveSupport::HashWithIndifferentAccess.new({ a: { b: 'b' } }) @@ -225,11 +238,13 @@ module ActiveSupport def reverse_merge(other_hash) super(self.class.new(other_hash)) end + alias_method :with_defaults, :reverse_merge # Same semantics as +reverse_merge+ but modifies the receiver in-place. def reverse_merge!(other_hash) replace(reverse_merge(other_hash)) end + alias_method :with_defaults!, :reverse_merge! # Replaces the contents of this hash with other_hash. # |