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Fix HashWithIndifferentAccess#to_options! so it doesn't clear the options hash.  Closes #10419 [ReinH]

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Fix that empty collections should be treated as empty arrays regardless of whitespace for Hash#from_xml (closes #10255) [adamj]

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Support for non heterogeneous arrays when serializing to xml. Unless guessable from array name the type name will be included as attribute 


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Added Hash#except which is the inverse of Hash#slice -- return the hash except the keys that are specified [DHH]

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Fixed that parameters from XML should also be presented in a hash with indifferent access [DHH] Hash#with_indifferent_access now also converts hashes kept in arrays to indifferent access (makes it easier to treat HTML and XML parameters the same) [DHH]

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Hash#to_xml supports YAML attributes; ActiveRecord::Base#to_xml support serialized attributes. Closes #7502.

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Hash#slice(*keys) returns a new hash with only the given keys. #slice! replaces the hash with only the given keys. Works with HashWithIndifferentAccess also.

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HashWithIndifferentAccess#to_hash converts to a Hash with String keys and the same default value. Fix Hash#reverse_update to be an alias for reverse_merge./script/console  More thoroughly test the reverse_* methods.

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Fix cases where empty xml nodes weren't being translated to nil in Hash.create_from_xml [Rick Olson]

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 Check whether @flash is defined? for warnings-safety.
 r4488@asus:  jeremy | 2006-04-29 12:23:15 -0700
 Check whether @flash is defined? for warnings-safety. Obviates nil? check.
 r4489@asus:  jeremy | 2006-04-29 12:45:18 -0700
 Check whether @session is defined? for warnings-safety.
 r4490@asus:  jeremy | 2006-04-29 12:50:41 -0700
 Check whether @rendering_runtime is defined? for warnings-safety.
 r4491@asus:  jeremy | 2006-04-29 12:55:01 -0700
 Check whether @_cycles is defined? for warnings-safety.
 r4492@asus:  jeremy | 2006-04-29 12:59:19 -0700
 Check whether instance variables are defined? for warnings-safety.
 r4493@asus:  jeremy | 2006-04-29 13:14:09 -0700
 Add nil @template to PrototypeHelperTest to suppress unitialized instance variable warning.
 r4494@asus:  jeremy | 2006-04-29 13:31:34 -0700
 Check whether @auto_index defined? for warnings-safety.
 r4495@asus:  jeremy | 2006-04-29 13:32:24 -0700
 Wrap content_columns redefinitions with silence_warnings.
 r4496@asus:  jeremy | 2006-04-29 13:35:28 -0700
 Wrap more redefinitions with silence_warnings.
 r4829@asus:  jeremy | 2006-07-08 10:59:20 -0700
 abstract unit, fix warnings
 r4830@asus:  jeremy | 2006-07-08 11:06:12 -0700
 Use parens to silence warning.
 r4831@asus:  jeremy | 2006-07-08 11:06:48 -0700
 Use parens to silence warning.


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HashWithIndifferentAccess shouldn't confuse false and nil. Closes #5601. Nor should it mistreat legitimate nil values.

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Added Hash.create_from_xml(string) which will create a hash from a XML string and even typecast if possible [DHH]

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Don't destroy a HashWithIndifferentAccess if symbolize_keys! or  stringify_keys! is called on it. Closes #5076. [Marcel Molina Jr., guy.naor@famundo.com]

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Fixed HashWithIndifferentAccess#delete to work with both symbols and strings (closes #2176) [Caio Chassot]

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