diff options
Diffstat (limited to 'activesupport/lib/core_ext/hash')
-rw-r--r-- | activesupport/lib/core_ext/hash/keys.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/activesupport/lib/core_ext/hash/keys.rb b/activesupport/lib/core_ext/hash/keys.rb new file mode 100644 index 0000000000..0db37a6374 --- /dev/null +++ b/activesupport/lib/core_ext/hash/keys.rb @@ -0,0 +1,36 @@ +module ActiveSupport + module CoreExtensions + module Hash + module Keys + + # Return a new hash with all keys converted to symbols. + def symbolize_keys + inject({}) do |options, (key, value)| + options[key.to_sym] = value + options + end + end + + # Destructively convert all keys to symbols. + def symbolize_keys! + keys.each do |key| + unless key.is_a?(Symbol) + self[key.to_sym] = self[key] + delete(key) + end + end + self + end + + alias_method :to_options, :symbolize_keys + alias_method :to_options!, :symbolize_keys! + + def assert_valid_keys(valid_keys) + unknown_keys = keys - valid_keys + raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty? + end + + end + end + end +end |