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Added Hash#stringify_keys and Hash#stringify_keys!

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@586 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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commit 83c3f6f81a4dbb618518aac9e411cd1f675fe571 1 parent 61a6a44
@dhh dhh authored
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2  activesupport/CHANGELOG
@@ -1,3 +1,5 @@
+* Added Hash#stringify_keys and Hash#stringify_keys!
+
* Added IndifferentAccess as a way to wrap a hash by a symbol-based store that also can be accessed by string keys
* Added Inflector.humanize to turn attribute names like employee_salary into "Employee salary". Used by automated error reporting in AR.
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19 activesupport/lib/core_ext/hash/keys.rb
@@ -2,6 +2,25 @@ module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
module Keys
+ # Return a new hash with all keys converted to strings.
+ def stringify_keys
+ inject({}) do |options, (key, value)|
+ options[key.to_s] = value
+ options
+ end
+ end
+
+ # Destructively convert all keys to strings.
+ def stringify_keys!
+ keys.each do |key|
+ unless key.is_a?(String)
+ self[key.to_s] = self[key]
+ delete(key)
+ end
+ end
+ self
+ end
+
# Return a new hash with all keys converted to symbols.
def symbolize_keys
inject({}) do |options, (key, value)|
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14 activesupport/test/core_ext/hash_ext_test.rb
@@ -12,6 +12,8 @@ def test_methods
h = {}
assert_respond_to h, :symbolize_keys
assert_respond_to h, :symbolize_keys!
+ assert_respond_to h, :stringify_keys
+ assert_respond_to h, :stringify_keys!
assert_respond_to h, :to_options
assert_respond_to h, :to_options!
end
@@ -32,6 +34,18 @@ def test_symbolize_keys!
assert_raises(NoMethodError) { { [] => 1 }.symbolize_keys! }
end
+ def test_stringify_keys
+ assert_equal @strings, @symbols.stringify_keys
+ assert_equal @strings, @strings.stringify_keys
+ assert_equal @strings, @mixed.stringify_keys
+ end
+
+ def test_stringify_keys!
+ assert_equal @strings, @symbols.dup.stringify_keys!
+ assert_equal @strings, @strings.dup.stringify_keys!
+ assert_equal @strings, @mixed.dup.stringify_keys!
+ end
+
def test_indifferent_access
@strings = @strings.with_indifferent_access
@symbols = @symbols.with_indifferent_access
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