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author | Mark McSpadden <markmcspadden@gmail.com> | 2012-05-10 16:05:19 -0500 |
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committer | Mark McSpadden <markmcspadden@gmail.com> | 2012-05-23 09:08:04 -0500 |
commit | 6ff887321b930197a8d62ddd0fc1dcb965ccda29 (patch) | |
tree | d27cdae39be7aa69ecaf9e918ecff176a51be268 /activesupport/lib/active_support | |
parent | a6d0e3795790c85dded4f2c396277214508dbc89 (diff) | |
download | rails-6ff887321b930197a8d62ddd0fc1dcb965ccda29.tar.gz rails-6ff887321b930197a8d62ddd0fc1dcb965ccda29.tar.bz2 rails-6ff887321b930197a8d62ddd0fc1dcb965ccda29.zip |
Add Hash#transform_keys and Hash#transform_keys! and refactor *_keys methods to use them.
Diffstat (limited to 'activesupport/lib/active_support')
-rw-r--r-- | activesupport/lib/active_support/core_ext/hash/keys.rb | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb index be4d611ce7..8b24ef3350 100644 --- a/activesupport/lib/active_support/core_ext/hash/keys.rb +++ b/activesupport/lib/active_support/core_ext/hash/keys.rb @@ -1,46 +1,53 @@ class Hash - # Return a new hash with all keys converted to strings. + # Return a new hash with all keys converted using the block operation. # - # { :name => 'Rob', :years => '28' }.stringify_keys - # #=> { "name" => "Rob", "years" => "28" } - def stringify_keys + # { :name => 'Rob', :years => '28' }.transform_keys{ |key| key.to_s.upcase } + # # => { "NAME" => "Rob", "YEARS" => "28" } + def transform_keys result = {} keys.each do |key| - result[key.to_s] = self[key] + result[yield(key)] = self[key] end result end - # Destructively convert all keys to strings. Same as - # +stringify_keys+, but modifies +self+. - def stringify_keys! + # Destructively convert all keys using the block operations. + # Same as transform_keys but modifies +self+ + def transform_keys! keys.each do |key| - self[key.to_s] = delete(key) + self[yield(key)] = delete(key) end self end + # Return a new hash with all keys converted to strings. + # + # { :name => 'Rob', :years => '28' }.stringify_keys + # #=> { "name" => "Rob", "years" => "28" } + def stringify_keys + transform_keys{ |key| key.to_s } + end + + # Destructively convert all keys to strings. Same as + # +stringify_keys+, but modifies +self+. + def stringify_keys! + transform_keys!{ |key| key.to_s } + end + # Return a new hash with all keys converted to symbols, as long as # they respond to +to_sym+. # # { 'name' => 'Rob', 'years' => '28' }.symbolize_keys # #=> { :name => "Rob", :years => "28" } def symbolize_keys - result = {} - keys.each do |key| - result[(key.to_sym rescue key)] = self[key] - end - result + transform_keys{ |key| key.to_sym rescue key } end alias_method :to_options, :symbolize_keys # Destructively convert all keys to symbols, as long as they respond # to +to_sym+. Same as +symbolize_keys+, but modifies +self+. def symbolize_keys! - keys.each do |key| - self[(key.to_sym rescue key)] = delete(key) - end - self + transform_keys!{ |key| key.to_sym rescue key } end alias_method :to_options!, :symbolize_keys! |