*2.3.8 (May 24, 2010)*

• Version bump.

*2.3.7 (May 24, 2010)*

• HTML safety: fix compatibility with the optional rails_xss plugin. [Nathan Weizenbaum, Santiago Pastorino]

*2.3.6 (May 23, 2010)*

• 1.9 compat: deprecated last_(month|year) in favor of prev_(month|year). [fxn]
• Deprecated Array#rand in favor of Array#random_element. [Santiago Pastorino, Rizwan Reza]
• Added Object#presence that returns the object if it‘s present? otherwise returns nil [DHH/Colin Kelley]
• New assertions assert_blank and assert_present. 4299 [Juanjo Bazan]
• Use Object#singleton_class instead of metaclass. Prefer Ruby‘s choice. [Jeremy Kemper]
• JSON backend for YAJL. Preferred if available. 2666 [Brian Lopez]
• Introduce String#html_safe for rails_xss plugin and forward-compatibility with Rails 3. [Michael Koziarski, Santiago Pastorino, José Ignacio Costa]
• Time#- with a DateTime argument behaves the same as with a Time argument, i.e. returns the difference between self and arg as a Float 3476 [Geoff Buesing]
• YAML serialization for OrderedHash. 3608 [Gregor Schmidt]
• Add Enumerable#exclude? to bring parity to Enumerable#include? and avoid if !x.include?/else calls [DHH]

*2.3.5 (November 25, 2009)*

• Minor Bug Fixes and deprecation warnings
• Update Edinburgh TimeZone to use "Europe/London" instead of "Europe/Dublin" 3310 [Phil Ross]
• Fixes for the Nokogiri backend for XmlMini
• Ruby 1.9 Compatibility

*2.3.4 (September 4, 2009)*

• Introduce ActiveSupport::Multibyte.clean to clean invalid multibyte strings.
• Bug fixes

*2.3.3 (July 12, 2009)*

• JSON: +Object#to_json+ calls as_json to coerce itself into something natively encodable like Hash, Integer, or String. Override as_json instead of to_json so you‘re JSON-library-agnostic. [Jeremy Kemper]
• Allow MemCacheStore to be initialized with a MemCache-like object instead of addresses and options [Bryan Helmkamp]

*2.3.2 [Final] (March 15, 2009)*

• XmlMini supports LibXML and Nokogiri backends. 2084, 2190 [Bart ten Brinke, Aaron Patterson]

    Example: XmlMini.backend = 'Nokogiri'
  

• Vendorize i18n 0.1.3 gem (fixes issues with incompatible character encodings in Ruby 1.9) 2038 [Akira Matsuda]
• Update bundled memcache-client from 1.5.0.5 to 1.6.4.99. See www.mikeperham.com/2009/02/15/memcache-client-performance/ [Mike Perham]
• Ruby 1.9.1p0 fix: URI.unescape can decode multibyte chars. 2033 [MOROHASHI Kyosuke]
• Time#to_s(:rfc822) uses formatted_offset instead of unreliable and non-standard %z directive 1899 [Zachary Zolton]
• Make TimeWithZone#to_formatted_s an alias to TimeWithZone#to_s 1796 [Levin Alexander]
• Introduce Array.wrap(foo) to wrap the argument in an array unless it‘s already an array. Wraps nil as an empty array. Use instead of Array(foo) and foo.to_a since they treat String as Enumerable. [Jeremy Kemper]
• TimeWithZone#xmlschema accepts optional fraction_digits argument [1725 state:resolved] [Nicholas Dainty]
• Object#tap shim for Ruby < 1.8.7. Similar to Object#returning, tap yields self then returns self. [Jeremy Kemper]

    array.select { ... }.tap(&:inspect).map { ... }
  

• TimeWithZone#- gives correct result with wrapped DateTime, and with DateTime argument [Geoff Buesing]
• Updated i18n gem to version 0.1.1 1635 [Yaroslav Markin]
• Add :allow_nil option to delegate. 1127 [Sergio Gil]
• Add Benchmark.ms convenience method to benchmark realtime in milliseconds. [Jeremy Kemper]
• Updated included memcache-client to the 1.5.0.5 version which includes fixes from fiveruns and 37signals to deal with failover and timeouts 1535 [Joshua Sierles]
• Multibyte: add multibyte-safe Chars#ord rather than falling back to String#ord. 1483 [Jason Cheow]
• I18n support for Array#to_sentence. Introduces support.array.words_connector, .two_words_connector, and .last_word_connector translation keys. 1397 [Akira Matsuda]
• Added ActiveSupport::OrderedHash#each_key and ActiveSupport::OrderedHash#each_value 1410 [Christoffer Sawicki]
• Added ActiveSupport::MessageVerifier and MessageEncryptor to aid users who need to store signed and/or encrypted messages. [Michael Koziarski]
• Added ActiveSupport::BacktraceCleaner to cut down on backtrace noise according to filters and silencers [David Heinemeier Hansson]
• Added Object#try. ( Taken from ozmm.org/posts/try.html ) [Chris Wanstrath]
• Added Enumerable#none? to check that none of the elements match the block 1408 [Damian Janowski]
• TimeZone offset tests: use current_period, to ensure TimeZone#utc_offset is up-to-date [Geoff Buesing]
• Update bundled TZInfo to 0.3.12 [Geoff Buesing]
• Added lambda merging to OptionMerger (especially useful with named_scope and with_options) 726 [Paweł Kondzior]

*2.2.1 [RC2] (November 14th, 2008)*

• Increment the version of our altered memcache-client to prevent confusion caused when the 1.5.0 gem is installed.
• Fixed the option merging in Array#to_xml 1126 [Rudolf Gavlas]
• Make I18n::Backend::Simple reload its translations in development mode [David Heinemeier Hansson/Sven Fuchs]

*2.2.0 [RC1] (October 24th, 2008)*

• TimeWithZone#freeze: preload instance variables so that we can actually freeze [Geoff Buesing]
• Fix Brasilia timezone 1180 [Marcus Derencius, Kane]
• Time#advance recognizes fractional days and weeks. Deprecate Durations of fractional months and years 970 [Tom Lea]
• Add ActiveSupport::Rescuable module abstracting ActionController::Base rescue_from features. [Norbert Crombach, Pratik Naik]
• Switch from String#chars to String#mb_chars for the unicode proxy. [Manfred Stienstra]

  This helps with 1.8.7 compatibility and also improves performance for some operations by reducing indirection.

• TimeWithZone wday, yday and to_date avoid trip through method_missing [Geoff Buesing]
• Added Time, Date, DateTime and TimeWithZone past?, future? and today? 720 [Clemens Kofler, Geoff Buesing]
• Fixed Sri Jayawardenepura time zone to map to Asia/Colombo [Jamis Buck]
• Added Inflector#parameterize for easy slug generation ("Donald E. Knuth".parameterize => "donald-e-knuth") 713 [Matt Darby]
• Changed cache benchmarking to be reported in milliseconds [David Heinemeier Hansson]
• Fix Ruby‘s Time marshaling bug in pre-1.9 versions of Ruby: utc instances are now correctly unmarshaled with a utc zone instead of the system local zone [900 state:resolved] [Luca Guidi, Geoff Buesing]
• Add Array#in_groups which splits or iterates over the array in specified number of groups. 579. [Adrian Mugnolo] Example:

  a = (1..10).to_a a.in_groups(3) #=> [[1, 2, 3, 4], [5, 6, 7, nil], [8, 9, 10, nil]] a.in_groups(3, false) #=> [[1, 2, 3, 4], [5, 6, 7], [8, 9, 10]]

• Fix TimeWithZone unmarshaling: coerce unmarshaled Time instances to utc, because Ruby‘s marshaling of Time instances doesn‘t respect the zone [Geoff Buesing]
• Added Memoizable mixin for caching simple lazy loaded attributes [Josh Peek]
• Move the test related core_ext stuff out of core_ext so it‘s only loaded by the test helpers. [Michael Koziarski]
• Add Inflection rules for String#humanize. 535 [Dan Manges]

  ActiveSupport::Inflector.inflections do |inflect|

    inflect.human(/_cnt$/i, '\1_count')
  

  end

  ‘jargon_cnt’.humanize # => ‘Jargon count‘

• TimeWithZone: when crossing DST boundary, treat Durations of days, months or years as variable-length, and all other values as absolute length. A time + 24.hours will advance exactly 24 hours, but a time + 1.day will advance 23-25 hours, depending on the day. Ensure consistent behavior across all advancing methods [Geoff Buesing]
• Added TimeZone #=~, to support matching zones by regex in time_zone_select. 195 [Ernie Miller]
• Added Array#second through Array#fifth as aliases for Array#[1] through Array#[4] + Array#forty_two as alias for Array[41] [David Heinemeier Hansson]
• Added test/do declaration style testing to ActiveSupport::TestCase [DHH via Jay Fields]
• Added Object#present? which is equivalent to !Object#blank? [David Heinemeier Hansson]
• Added Enumberable#many? to encapsulate collection.size > 1 [David Heinemeier Hansson/Damian Janowski]
• Add more standard Hash methods to ActiveSupport::OrderedHash [Steve Purcell]
• Namespace Inflector, Dependencies, OrderedOptions, and TimeZone under ActiveSupport [Josh Peek]
• Added StringInquirer for doing things like StringInquirer.new("production").production? # => true and StringInquirer.new("production").development? # => false [David Heinemeier Hansson]
• Fixed Date#end_of_quarter to not blow up on May 31st [289 state:resolved] (Danger)

*2.1.0 (May 31st, 2008)*

• TimeZone#to_s shows offset as GMT instead of UTC, because GMT will be more familiar to end users (see time zone selects used by Windows OS, google.com and yahoo.com.) Reverts [8370] [Geoff Buesing]
• Hash.from_xml: datetime xml types overflow to Ruby DateTime class when out of range of Time. Adding tests for utc offsets [Geoff Buesing]
• TimeWithZone #+ and #- : ensure overflow to DateTime with Numeric arg [Geoff Buesing]
• Time#to_json: don‘t convert to utc before encoding. References 175 [Geoff Buesing]
• Remove unused JSON::RESERVED_WORDS, JSON.valid_identifier? and JSON.reserved_word? methods. Resolves 164. [Cheah Chu Yeow]
• Adding Date.current, which returns Time.zone.today if config.time_zone is set; otherwise returns Date.today [Geoff Buesing]
• TimeWithZone: date part getter methods (year mon day etc) are defined on class; no longer relying on method_missing [Geoff Buesing]
• Time.zone.parse return nil for strings with no date information [Geoff Buesing]
• Time.zone.parse respects offset information in string. Resolves 105. [Scott Fleckenstein, Geoff Buesing]
• Added Ruby 1.8 implementation of Process.daemon
• Duration since and ago with no argument (e.g., 5.days.ago) return TimeWithZone when config.time_zone is set. Introducing Time.current, which returns Time.zone.now if config.time_zone is set, otherwise just returns Time.now [Geoff Buesing]
• Time#since behaves correctly when passed a Duration. Closes 11527 [kemiller]
• Add getutc alias for DateTime#utc [Geoff Buesing]
• Refactor TimeWithZone: don‘t send since, ago, #+, #-, advance through method_missing [Geoff Buesing]
• TimeWithZone respects config.active_support.use_standard_json_time_format [Geoff Buesing]
• Add config.active_support.escape_html_entities_in_json to allow disabling of html entity escaping. [Rick Olson]
• Improve documentation. [Xavier Noria]
• Modified ActiveSupport::Callbacks::Callback#call to accept multiple arguments.
• Time yesterday and tomorrow behave correctly crossing DST boundary. Closes 7399 [sblackstone]
• TimeWithZone: Adding tests for dst and leap day edge cases when advancing time [Geoff Buesing]
• TimeWithZone#method_missing: send to utc to advance with dst correctness, otherwise send to time. Adding tests for time calculations methods [Geoff Buesing]
• Add config.active_support.use_standard_json_time_format setting so that Times and Dates export to ISO 8601 dates. [Rick Olson]
• TZInfo: Removing unneeded TimezoneProxy class [Geoff Buesing]
• TZInfo: Removing unneeded TimezoneIndexDefinition, since we‘re not including Indexes::Timezones [Geoff Buesing]
• Removing unnecessary uses_tzinfo helper from tests, given that TZInfo is now bundled [Geoff Buesing]
• Bundling abbreviated version of TZInfo gem 0.3.8: only the classes and zone definitions required to support Rails time zone features are included. If a recent version of the full TZInfo gem is installed, this will take precedence over the bundled version [Geoff Buesing]
• TimeWithZone#marshal_load does zone lookup via Time.get_zone, so that tzinfo/Olson identifiers are handled [Geoff Buesing]
• Time.zone= accepts TZInfo::Timezone instances and Olson identifiers; wraps result in TimeZone instance [Geoff Buesing]
• TimeWithZone time conversions don‘t need to be wrapped in TimeOrDateTime, because TZInfo does this internally [Geoff Buesing]
• TimeWithZone#usec returns 0 instead of error when DateTime is wrapped [Geoff Buesing]
• Improve documentation. [Ryan Bigg, Jan De Poorter, Cheah Chu Yeow, Xavier Shay, Jack Danger Canty, Emilio Tagua, Xavier Noria, Sunny Ripert]
• Ensure that TimeWithZone#to_yaml works when passed a YAML::Emitter. [Rick Olson]
• Ensure correct TimeWithZone#to_date [Geoff Buesing]
• Make TimeWithZone work with tzinfo 0.2.x: use TZInfo::Timezone#zone_identifier alias for abbreviation, silence warnings on tests. Raise LoadError when TZInfo version is < 0.2 by sniffing for TZInfo::TimeOrDateTime constant. Move all tzinfo-dependent TimeZone tests into uses_tzinfo block [Geoff Buesing]
• Time, DateTime and TimeWithZone in_time_zone defaults to Time.zone. Removing now unneeded in_current_time_zone [Geoff Buesing]
• TZInfo caches Timezone instances in its own internal hash cache, so TimeZone::MAPPING doesn‘t need to cache them as well [Geoff Buesing]
• Adding TimeZone#parse [Geoff Buesing]
• Adding TimeZone#at and DateTime#to_f [Geoff Buesing]
• TimeWithZone responds to Ruby 1.9 weekday-named query methods [Geoff Buesing]
• TimeWithZone caches TZInfo::TimezonePeriod used for time conversion so that it can be reused, and enforces DST rules correctly when instance is created from a local time [Geoff Buesing]
• Fixed that BufferedLogger should create its own directory if one doesn‘t already exist 11285 [lotswholetime]
• Fix Numeric time tests broken by DST change by anchoring them to fixed times instead of Time.now. Anchor TimeZone#now DST test to time specified with Time.at instead of Time.local to work around platform differences with Time.local and DST representation [Geoff Buesing]
• Removing unneeded change_time_zone method from Time, DateTime and TimeWithZone [Geoff Buesing]
• TimeZone local and now correctly enforce DST rules [Geoff Buesing]
• TimeWithZone instances correctly enforce DST rules. Adding TimeZone#period_for_utc [Geoff Buesing]
• test_time_with_datetime_fallback expects DateTime.local_offset instead of DateTime.now.offset [Geoff Buesing]
• Adding TimeWithZone marshal_dump and marshal_load [Geoff Buesing]
• Add OrderedHash#to_hash [Josh Peek]
• Adding Time#end_of_day, _quarter, _week, and _year. 9312 [Juanjo Bazan, Tarmo Tänav, BigTitus]
• Adding TimeWithZone#between? [Geoff Buesing]
• Time.=== returns true for TimeWithZone instances [Geoff Buesing]
• TimeWithZone #+ and #- behave consistently with numeric arguments regardless of whether wrapped time is a Time or DateTime; consistenty answers false to acts_like?(:date) [Geoff Buesing]
• Add String#squish and String#squish! to remove consecutive chunks of whitespace. 11123 [Jordi Bunster, Henrik N]
• Serialize BigDecimals as Floats when using to_yaml. 8746 [Ernesto Jimenez]
• Adding TimeWithZone to_yaml, to_datetime, eql? and method aliases for duck-typing compatibility with Time [Geoff Buesing]
• TimeWithZone in_time_zone returns self if zone argument is the same as time_zone [Geoff Buesing]
• Adding TimeWithZone to_a, to_f, to_i, httpdate, rfc2822 [Geoff Buesing]
• Pruning unneeded TimeWithZone#change_time_zone_to_current [Geoff Buesing]
• Time#zone=, in_time_zone and change_time_zone accept a Duration [Geoff Buesing]
• Time#in_time_zone handles Time.local instances correctly [Geoff Buesing]
• Pruning unneeded Time#change_time_zone_to_current. Enhanced docs to change_time_zone to explain the difference between this method and in_time_zone [Geoff Buesing]
• TimeZone#new method renamed local; when used with Time.zone, constructor now reads: Time.zone.local() [Geoff Buesing]
• Added Base64.encode64s to encode values in base64 without the newlines. This makes the values immediately usable as URL parameters or memcache keys without further processing [David Heinemeier Hansson]
• Remove :nodoc: entries around the ActiveSupport test/unit assertions. 10946 [dancroak, jamesh]
• Add Time.zone_default accessor for setting the default time zone. Rails::Configuration.time_zone sets this. 10982 [Geoff Buesing]
• cache.fetch(key, :force => true) to force a cache miss. [Jeremy Kemper]
• Support retrieving TimeZones with a Duration. TimeZone[-28800] == TimeZone. [Rick Olson]
• TimeWithZone#- added, so that #- can handle a Time or TimeWithZone argument correctly [Geoff Buesing]
• with_timezone test helper renamed with_env_tz, to distinguish between setting ENV[‘TZ’] and setting Time.zone in tests [Geoff Buesing]
• Time#- coerces TimeWithZone argument to a Time instance so that difference in seconds can be calculated. Closes 10914 [Geoff Buesing, yyyc514]
• Adding UTC zone to TimeZone; TimeWithZone no longer has to fake UTC zone with nil [Geoff Buesing]
• Time.get_zone refactored to private method, given that the encapsulated logic is only useful internally [Geoff Buesing]
• Time.zone uses thread-local variable for thread safety. Adding Time.use_zone, for overriding Time.zone locally inside a block. Removing unneeded Time.zone_reset! [Geoff Buesing]
• TimeZone#to_s uses UTC rather than GMT; reapplying change that was undone in [8679]. 1689 [Cheah Chu Yeow]
• Time.days_in_month defaults to current year if no year is supplied as argument 10799 [Radar], uses Date.gregorian_leap? to determine leap year, and uses constant lookup to determine days in month [Geoff Buesing]
• Adding Time and DateTime compare_with_coercion, which layers behavior on #<=> so that any combination of Time, DateTime and ActiveSupport::TimeWithZone instances can be chronologically compared [Geoff Buesing]
• TimeZone#now returns an ActiveSupport::TimeWithZone [Geoff Buesing]
• Time in_current_time_zone and change_time_zone_to_current return self when Time.zone is nil [Geoff Buesing]
• Remove unneeded to_datetime_default_s alias for DateTime#to_s, given that we inherit a to_default_s from Date that does exactly the same thing [Geoff Buesing]
• Refactor Time and DateTime to_formatted_s: use ternary instead of nested if/else [Geoff Buesing]
• Adding Time and DateTime formatted_offset, for outputting +HH:MM utc offset strings with cross-platform consistency [Geoff Buesing]
• Adding alternate_utc_string option to TimeZone#formatted_offset. Removing unneeded TimeZone#offset. [Geoff Buesing]
• Introduce ActiveSupport::TimeWithZone, for wrapping Time instances with a TimeZone. Introduce instance methods to Time for creating TimeWithZone instances, and class methods for managing a global time zone. [Geoff Buesing]
• Replace non-dst-aware TimeZone class with dst-aware class from tzinfo_timezone plugin. TimeZone#adjust and unadjust are no longer available; tzinfo gem must now be present in order to perform time zone calculations, via local_to_utc and utc_to_local methods. [Geoff Buesing]
• Extract ActiveSupport::Callbacks from Active Record, test case setup and teardown, and ActionController::Dispatcher. 10727 [Josh Peek]
• Introducing DateTime utc, utc? and utc_offset, for duck-typing compatibility with Time. Closes 10002 [Geoff Buesing]
• Time#to_json uses Numeric#to_utc_offset_s to output a cross-platform-consistent representation without having to convert to DateTime. References 9750 [Geoff Buesing]
• Refactor number-to-HH:MM-string conversion logic from TimeZone#formatted_offset to a reusable Numeric#to_utc_offset_s method. [Geoff Buesing]
• Continue evolution toward ActiveSupport::TestCase. 10679 [Josh Peek]
• TestCase: introduce declared setup and teardown callbacks. Pass a list of methods and an optional block to call before setup or after teardown. Setup callbacks are run in the order declared; teardown callbacks are run in reverse. [Jeremy Kemper]
• Added ActiveSupport::Gzip.decompress/compress(source) as an easy wrapper for Zlib [Tobias Lütke]
• Included MemCache-Client to make the improved ActiveSupport::Cache::MemCacheStore work out of the box [Bob Cottrell, Eric Hodel]
• Added ActiveSupport::Cache::* framework as an extraction from ActionController::Caching::Fragments::* [David Heinemeier Hansson]
• Fixed String#titleize to work for strings with ‘s too 10571 [trek]
• Changed the implementation of Enumerable#group_by to use a double array approach instead of a hash such that the insert order is honored [David Heinemeier Hansson/Marcel Molina Jr.]
• remove multiple enumerations from ActiveSupport::JSON#convert_json_to_yaml when dealing with date/time values. [Rick Olson]
• Hash#symbolize_keys skips keys that can‘t be symbolized. 10500 [Brad Greenlee]
• Ruby 1.9 compatibility. 1689, 10466, 10468, 10554, 10594, 10632 [Cheah Chu Yeow, Pratik Naik, Jeremy Kemper, Dirkjan Bussink, Xavier Noria]
• TimeZone#to_s uses UTC rather than GMT. 1689 [Cheah Chu Yeow]
• Refactor of Hash#symbolize_keys! to use Hash#replace. Closes 10420 [ReinH]
• Fix HashWithIndifferentAccess#to_options! so it doesn‘t clear the options hash. Closes 10419 [ReinH]

*2.0.1* (December 7th, 2007)

• Added Array#from and Array#to that behaves just from String#from and String#to [David Heinemeier Hansson]
• Fix that empty collections should be treated as empty arrays regardless of whitespace for Hash#from_xml 10255 [adamj]
• Time#time_with_datetime_fallback, Time#to_datetime, Date#to_datetime and String#to_datetime honor Ruby‘s default calendar reform setting. 10201 [Geoff Buesing]
• Change Time and DateTime end_of_month to return last second of month instead of beginning of last day of month. Closes 10200 [Geoff Buesing]
• Speedup String#blank? [Jeremy Kemper, Michael Koziarski]
• Add documentation for Hash#diff. Closes 9306 [Tarmo Tänav]
• Add new superclass_delegating_accessors. Similar to class inheritable attributes but with subtly different semantics. [Michael Koziarski, Tarmo Tänav]
• Change JSON to encode %w(< > &) as 4 digit hex codes to be in compliance with the JSON spec. Closes 9975 [Josh Peek, Cheah Chu Yeow, Tim Pope]
• Fix JSON encoding/decoding bugs dealing with /’s. Closes 9990 [Rick Olson, theamazingrando]
• Introduce a base class for all test cases used by rails applications. ActiveSupport::TestCase [Michael Koziarski]

  The intention is to use this to reduce the amount of monkeypatching / overriding that is done to test/unit‘s classes.

• Document Enumerable and Hash to_json. 9970 [Cheah Chu Yeow]
• Hash#to_xml handles symbol values. 9954 [Assaf]
• Hash#symbolize_keys behaves well with integer keys. 9890 [PotatoSalad]
• Multibyte: String#slice supports regexp argument. 9646 [yob]
• object.duplicable? returns true if object.dup is safe. False for nil, true, false, symbols, and numbers; true otherwise. 9333 [sur]
• Time, Date and DateTime advance accept :weeks option. 9866 [Geoff Buesing]
• Fix Time#years_ago and years_since from leap days. 9865 [Geoff Buesing]
• Time and DateTime#advance accept :hours, :minutes, and :seconds options. 9825 [Geoff Buesing]
• Fix Date#years_ago and years_since from leap days. 9864 [Geoff Buesing]
• Refactor Time and Date#months_since and months_ago to use advance. 9863 [Geoff Buesing]
• Rebundle Builder 2.1.2 but prefer a newer RubyGem if available. [Jeremy Kemper]
• Add Range#overlaps?(range), Range#include?(range), and Range#step without a block. [brandon]
• Correct BufferedLogger#level? checks. 9806 [wildchild, Johan Sorensen]
• String#to_xs uses Eric Wong‘s fast_xs extension, if available, for Builder speedup. bogomips.org/fast_xs/ [Jeremy Kemper]
• Introduce BasicObject as Builder::BlankSlate for Ruby 1.9 forward compatibility. [Jeremy Kemper]
• Unbundle Builder in favor of a gem dependency. [Jeremy Kemper]
• Disambiguate Time, Date, and DateTime#to_json formatting. 9750 [Geoff Buesing, Cheah Chu Yeow]
• Hash#to_json takes :only or :except options to specific or omit certain hash keys. Enumerable#to_json passes through its options to each element. 9751 [Cheah Chu Yeow]
• BufferedLogger#auto_flushing = N flushes the log every N messages. Buffers with an array instead of string. Disabling auto_flushing still flushes when the buffer hits a maximum size, as a failsafe against memory-gobbling. [Jeremy Kemper]
• Fixed Date#xmlschema for dates outside the range of what can be created with Time 9744 [Geoff Buesing]
• Fixed that La Paz was included in -25200 and -14400 offsets when it should only be in -14400 9735 [bermi]
• Fixed JSON encoding to use quoted keys according to the JSON standard. 8762 [choonkat, Cheah Chu Yeow]
• Alias Object#send to send! for Ruby 1.9 forward compatibility. [Jeremy Kemper]
• Backport Object#instance_variable_defined? for Ruby < 1.8.6. [Jeremy Kemper]
• BufferedLogger#add converts the message to a string. 9702, 9724 [eigentone, DrMark, Tom Ward]
• Added ActiveSupport::BufferedLogger as a duck-typing alternative (albeit with no formatter) to the Ruby Logger, which provides a very nice speed bump (inspired by Ezra‘s buffered logger) [David Heinemeier Hansson]
• Object#instance_exec produces fewer garbage methods. [Mauricio Fernandez]
• Decode json strings as Dates/Times if they‘re using a YAML-compatible format. Closes 9614 [Rick Olson]
• Fixed cache_page to use the request url instead of the routing options when picking a save path. 8614 [Josh Peek]
• Object.subclasses_of includes anonymous subclasses. [Jeremy Kemper]
• Fixed that pluralizing an empty string should return the same empty string, not "s". 7720 [Josh Peek]
• Added call to inspect on non-string classes for the logger 8533 [Coda Hale]
• Deprecation: remove deprecated :mday option from Time, Date, and DateTime#change. [Jeremy Kemper]
• Fix JSON decoder with nested quotes and commas. 9579 [Zach Dennis]
• Hash#to_xml doesn‘t double-unescape. 8806 [Ezran]
• Added Array#rand 9170 [Norbert Crombach]. Examples:

    [].rand       # => nil
    ['a'].rand    # => 'a'
    [1,2,3].rand  # => 1 or 2 or 3
  

• Deprecation: removed Reloadable. [Jeremy Kemper]
• Make the utf-handler return the correct value for non-matching regular expressions. Closes 9049 [Manfred Stienstra]
• Add ljust, rjust and center to utf8-handler. Closes 9165 [Manfred Stienstra]
• Fix Time#advance bug when trying to advance a year from leap day. Closes 8655 [Geoff Buesing]
• Add support for []= on ActiveSupport::Multibyte::Chars. Closes 9142. [ewan, Manfred Stienstra]
• Added Array#extract_options! to encapsulate the pattern of getting an options hash out of a variable number of parameters. 8759 [Norbert Crombach]
• Let alias_attribute work with attributes with initial capital letters (legacy columns etc). Closes 8596 [mpalmer]
• Added Hash#except which is the inverse of Hash#slice — return the hash except the keys that are specified [David Heinemeier Hansson]
• Added support for pluralization with a different starting letter than the singular version (cow/kine) 4929 [norri_b/Josh Susser]
• Demote Hash#to_xml to use XmlSimple#xml_in_string so it can‘t read files or stdin. 8453 [candlerb, Jeremy Kemper]
• Backport clean_logger changes to support ruby 1.8.2 [Mislav Marohnić]
• Added proper handling of arrays 8537 [Josh Susser]

  Before:

    Hash.from_xml '<images></images>'
    # => {:images => nil}
  
    Hash.from_xml '<images><image>foo.jpg</image></images>'
    # => {:images => {:image => "foo.jpg"}}
  
    Hash.from_xml '<images><image>foo.jpg</image><image>bar.jpg</image></images>'
    # => {:images => {:image => ["foo.jpg", "bar.jpg"]}}
  

  After:

    Hash.from_xml '<images type="array"></images>'
    # => {:images => []}
  
    Hash.from_xml '<images type="array"><image>foo.jpg</image></images>'
    # => {:images => ["foo.jpg"]}
  
    Hash.from_xml '<images type="array"><image>foo.jpg</image><image>bar.jpg</image></images>'
    # => {:images => ["foo.jpg", "bar.jpg"]}
  

• Improve Time and Date test coverage. 8646 [Josh Peek]
• Add Date#since, ago, beginning_of_day, and end_of_day. Date + seconds works now. 8575 [Geoff Buesing]
• String#to_time overflows to DateTime. Add String#to_datetime. 8572 [Geoff Buesing]
• Date.yesterday and .tomorrow. 8571 [Geoff Buesing]
• Readable Date and DateTime#inspect. 8570 [Geoff Buesing]
• Move common DateTime calculations to Date. 8536 [Geoff Buesing]
• Added Date#change (like Time#change) [David Heinemeier Hansson]
• DateTime#to_time converts to Time unless out of range. 8512 [Geoff Buesing]
• Date#to_datetime, to_s(:rfc822). 8512 [Geoff Buesing]
• Time durations use since instead of + for accuracy. 8513 [Geoff Buesing]
• escape <’s and >’s in JSON strings. 8371 [Rick Olson]
• Inflections: MatrixTest -> MatrixTests instead of MatricesTest. 8496 [jbwiv]
• Multibyte strings respond_to the String methods they proxy so they can be duck-typed. 6549 [Tuxie]
• Array#to_xml yields the builder just like Hash and ActiveRecord::Base. 8472 [seth]
• Date, Time, and DateTime support formatting blocks in addition to strftime strings. Introduce :long_ordinal format, e.g. "February 21st, 2005". 8191 [Coda Hale]
• Document Object#blank?. 6491 [Chris Mear]
• Date, Time, and DateTime#to_json. 8399 [wycats]
• Simplify API of assert_difference by passing in an expression that is evaluated before and after the passed in block. See documenation for examples of new API. [Marcel Molina Jr.]
• Added assert_difference and assert_no_difference to test/unit assertions [Tobias Lütke]
• Removed breakpointer and Binding.of_caller in favor of relying on ruby-debug by Kent Sibilev since the breakpointer has been broken since Ruby 1.8.4 and will not be coming back [David Heinemeier Hansson]
• Added parsing of file type in Hash.xml_in so you can easily do file uploads with base64 from an API [David Heinemeier Hansson]

    <person>
      <name>David</name>
      <avatar type="file" name="me.jpg" content_type="image/jpg">R0lGODlhkACZAPUAAM5lcfjrtMQCG=\n</avatar>
    </person>
  

  …becomes:

    attributes = { :person => { :name => "David", :avatar => #<StringIO> } }
    attributes[:person][:avatar].content_type      # => "image/jpg"
    attributes[:person][:avatar].original_filename # => "me.jpg"
    attributes[:person][:avatar].read # => binary data of the file
  

  Which is duck-type compatible with the files that you get when doing multipart uploads through HTML.

• Improved multibyte performance by relying less on exception raising 8159 [Blaine]
• Use XSD-compatible type names for Hash#to_xml and make the converters extendable 8047 [Tim Pope]
• Added yielding of builder in Hash#to_xml [David Heinemeier Hansson]
• 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) [David Heinemeier Hansson]
• Hash#to_xml supports YAML attributes. 7502 [jonathan]
• Refactor ActiveSupport::JSON to be less obtuse. Add support for JSON decoding by way of Syck with ActiveSupport::JSON.decode(json_string). Prevent hash keys that are JavaScript reserved words from being unquoted during encoding. [Sam Stephenson]
• alias_method_chain preserves the original method‘s visibility. 7854 [Jonathan Viney]
• Update Dependencies to ignore constants inherited from ancestors. Closes 6951. [Nicholas Seckar]
• Array#to_query preserves its ordering. 7756 [Greg Spurrier]
• Out-of-range Time calculations transparently overflow to DateTime. Introduce Time#to_datetime. 7706, 7715 [Geoff Buesing]
• DateTime calculations analogous to the Date and Time extensions. 7693 [Geoff Buesing]
• Give DateTime correct .to_s implementations, lets it play nice with ActiveRecord quoting. 7649 [Geoff Buesing]
• Add File.atomic_write, allows you to write large files in an atomic manner, preventing users from seeing half written files. [Michael Koziarski]
• Allow users to provide custom formatters to Logger. [Anthony Eden]
• Hash#to_query CGI-escapes its keys. [Jeremy Kemper]
• Optimize Class Inheritable Attributes so that unnecessary hashes are not created. Closes 7472 [Bruce Perens]
• :db format for Date#to_s [Jeremy Kemper]

    Date.new(2007, 1, 27).to_s(:db) # => '2007-01-27'
  

• Added :instance_writer option to mattr_writer/accessor, cattr_writer/accessor, and class_inheritable_writer to skip the creation of the instance writer. [Rick Olson]
• Added Hash#to_query to turn a hash of values into a form-encoded query string [Nicholas Seckar]
• Increase test coverage for subclasses_of. Closes 7335. [Roman2K, Nicholas Seckar]
• Remove unused code from Duration#inspect. Closes 7180. [Rich Collins]
• Added test coverage for Inflector.inflections.clear. Closes 7179. [Rich Collins]
• ActiveSupport::Multibyte::Handlers::UTF8Handler should raise when a range and an integer are passed in (just like the native implementation). Closes 7176 [Rich Collins]
• A couple extra tests for classify. Closes 7273. [Josh Susser]
• Better docs for Object extensions [zackchandler, Jamis Buck]
• Fix that Dates couldn‘t be subtracted from Dates after [5940]. [Sam Stephenson]
• Add Object#acts_like? and Time#acts_like_time? and Date#acts_like_date? to facilitate duck-typing. [Jamis Buck]
• Make 1.months and friends accurate by introducing a Duration class. 6835 [eventualbuddha]

*1.4.2* (March 12th, 2007)

• Ruby 1.8.6 and 1.9 define private Time#to_date and to_datetime; make them

public for compatibility. [Jeremy Kemper]

• Deprecation: warn on stderr if RAILS_DEFAULT_LOGGER isn‘t set yet. [Jeremy Kemper]

*1.4.1* (February 5th, 2007)

• Optimize Class Inheritable Attributes so that unnecessary hashes are not created. Closes 7472 [Bruce Perens]
• Added :instance_writer option to mattr_writer/accessor, cattr_writer/accessor, and class_inheritable_writer to skip the creation of the instance writer. [Rick Olson]
• Full test coverage for Inflector. 7228 [Dan Kubb]

*1.4.0* (January 16th, 2007)

• Document Inflector.ordinalize and merge docs from String inflections. 7023 [smeade]
• Unbundle flexmock. [Jeremy Kemper]
• Fix Dependencies.autoloaded? to ignore anonymous modules. Closes 6561. [Nicholas Seckar]
• Update load once paths to prevent nested once constants from being detected and claimed by an external non-once load. [Nicholas Seckar]
• Deprecation: silence warnings when reporting test errors. [Jeremy Kemper]
• 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. [Jeremy Kemper]
• HashWithIndifferentAccess#to_hash converts to a Hash with String keys and the same default value. [Jeremy Kemper]
• Fix remove_constant to correctly handle constant names of the form "::A::…". References 6720. [Nicholas Seckar]
• Fixed Array#to_xml when it contains a series of hashes (each piece would get its own XML declaration) 6610 [thkarcher/cyu]
• Added Time#to_s(:time) which will just return H:M, like 17:44 [David Heinemeier Hansson]
• Add Module#attr_accessor_with_default to initialize value of attribute before setting it. Closes 6538. [Stuart Halloway, Marcel Molina Jr.]
• Hash#to_xml handles keys with the same name as Kernel methods. 6613 [Jonathan del Strother]
• Added Time#end_of_day to get 23:59:59 of that day [David Heinemeier Hansson]
• Don‘t quote hash keys in Hash#to_json if they‘re valid JavaScript identifiers. Disable this with ActiveSupport::JSON.unquote_hash_key_identifiers = false if you need strict JSON compliance. [Sam Stephenson]
• Lazily load the Unicode Database in the UTF-8 Handler [Rick Olson]
• Update dependencies to delete partially loaded constants. [Nicholas Seckar]
• Fix unicode JSON regexp for Onigurama compatibility. 6494 [whitley]
• update XmlSimple to 1.0.10. Closes 6532. [Nick Sieger]
• Update dependencies to allow constants to be defined alongside their siblings. A common case for this is AR model classes with STI; user.rb might define User, Administrator and Guest for example. [Nicholas Seckar]
• next_week respects DST changes. 6483, 5617, 2353, 2509, 4551 [marclove, Rob Biedenharn, rails@roetzel.de, jsolson@damogran.org, drbrain@segment7.net]
• Expose methods added to Enumerable in the documentation, such as group_by. Closes 6170. [sergeykojin@gmail.com, Marcel Molina Jr.]
• Ensure Chars#tidy_bytes only tidies broken bytes. Closes 6397 [Manfred Stienstra]
• Add ‘unloadable’, a method used to mark any constant as requiring an unload after each request. [Nicholas Seckar]
• Make core_ext/string/access.rb multibyte safe. Closes 6388 [Manfred Stienstra]
• Make String#chars slicing behaviour consistent with String. Closes 6387 [Manfred Stienstra]
• Pull in latest multibyte patch. Closes 6346 [Manfred Stienstra]
• Add ActiveSupport::Multibyte. Provides String#chars which lets you deal with strings as a sequence of chars, not of bytes. Closes 6242 [Julian Tarkhanov, Manfred Stienstra, Thijs van der Vossen & Jan Behrens]
• Fix issue with class_inheritable_accessor saving updates to the parent class when initialized with an Array or Hash [mojombo]
• Hash#to_xml supports Bignum and BigDecimal. 6313 [edibiase]
• Don‘t undefine class in OptionMerger [Rick Olson]
• Hash.create_from_xml has been renamed to Hash.from_xml, alias will exist until Rails 2.0 [David Heinemeier Hansson]
• alias_method_chain works with accessor= methods also. 6153 [Caio Chassot]
• Fix loadable_constants_for_path to handle load paths that do not end with a slash. [Nicholas Seckar]
• Fix logic error in determining what was loaded by a given file. Closes 6039. [Nicholas Seckar]
• Equate Kernel.const_missing with Object.const_missing. Fixes 5988. [Nicholas Seckar]
• Add ApplicationController special case to Dependencies. [Nicholas Seckar]
• Don‘t pad remaining places with in_groups_of if specified padding value is false. [Marcel Molina Jr.]
• Fix cases where empty xml nodes weren‘t being translated to nil in Hash.create_from_xml [Rick Olso n]

  <written-on type="date"></written-on> # => { :type => ‘date’ } # WRONG <written-on type="date"></written-on> # => nil # RIGHT

• Tighten rescue clauses. 5985 [james@grayproductions.net]
• Inflections: don‘t singularize -ies plurals. [foamdino@gmail.com, Mark Van Holstyn]
• Update Initializer to use load_once_paths to avoid plugin reloading. References 5852. [Nicholas Seckar]
• Use Array#assoc in ActiveSupport::OrderedHash. [Mauricio Fernandez]
• Greatly increased performance of String.to_json, which speeds up RJS considerably on large pages, fixes 3473 [Shugo Maeda]
• Detect missing_constants calls from removed modules and fail accordingly. [Nicholas Seckar]
• Stop using defined? in Dependencies.qualified_const_defined? since defined? may invoke const_missing. [Nicholas Seckar]
• Dependencies can autoload directories of nested classes. [Jeremy Kemper]

    Example:
      invoice.rb            class Invoice
      invoice/lineitem.rb   class Invoice::Lineitem
  

• Add Deprecation.silence so that Reloadable does not scold itself. [Nicholas Seckar]
• Add debugging logging to Dependencies. Currently can be enabled with Dependencies.log_activity = true; adding to Initializer and documenting is forthcoming. [Nicholas Seckar]
• Replace Reloadable with improvements to the Dependencies mechanism. [Nicholas Seckar]
• DateTime#to_time gives hour/minute/second resolution. 5747 [jon.evans@pobox.com]
• attr_internal to support namespacing and deprecation. Like attr_* except backed by internally-named instance variable. Set attr_internal_naming_format to change the format from the default ’@_%s’. [Jeremy Kemper]

    # def foo()   @foo__rofl      end
    # def foo=(v) @foo__rofl = v  end
    self.attr_internal_naming_format = '@%s__rofl'
    attr_internal :foo
  

• Raise fully qualified names upon name errors. 5533 [Lars Pind, Nicholas Seckar]
• Add extention to obtain the missing constant from NameError instances. [Nicholas Seckar]
• Thoroughly document inflections. 5700 [petermichaux@gmail.com]
• Added Module#alias_attribute [Jamis/David Heinemeier Hansson]. Example:

    class Content < ActiveRecord::Base
      # has a title attribute
    end
  
    class Email < ActiveRecord::Base
      alias_attribute :subject, :title
    end
  
    e = Email.find(1)
    e.title    # => "Superstars"
    e.subject  # => "Superstars"
    e.subject? # => true
    e.subject = "Megastars"
    e.title    # => "Megastars"
  

• Deprecation: easier to work with warning behavior as procs; default behaviors for each environment so users needn‘t update env.rb; and testing pleasure with assert_deprecated, assert_not_deprecated. [Jeremy Kemper] By default, test prints to $stderr, dev logs, production ignores. Provide your own per-environment in e.g. config/environments/development.rb:

    ActiveSupport::Deprecation.behavior = Proc.new { |message| raise message }
  

• First cut of the Rails Deprecation system. [Michael Koziarski]
• Strip boolean XML content before checking for ‘true’ [Rick Olson]
• Customize default BigDecimal formatting. References 5672 [Dave Thomas]
• Correctly convert <foo nil="true"> to nil when using Hash.create_from_xml. [Rick Olson]
• Optional identity for Enumerable#sum defaults to zero. 5657 [gensym@mac.com]
• HashWithIndifferentAccess shouldn‘t confuse false and nil. 5601 [Shugo Maeda]
• Fixed HashWithIndifferentAccess#default 5586 [chris@seagul.co.uk]
• More compatible Hash.create_from_xml. 5523 [nunemaker@gmail.com]
• Added Enumerable#sum for calculating a sum from the elements [David Heinemeier Hansson, jonathan@daikini.com]. Examples:

    [1, 2, 3].sum
    payments.sum { |p| p.price * p.tax_rate }
    payments.sum(&:price)
  

  This is instead of payments.inject(0) { |sum, p| sum + p.price }

• Correct and clarify Array#to_sentence docs. 5458 [brad@madriska.com]
• alias_method_chain preserves method punctuation so foo, foo?, and foo! may be chained with the same feature. [Jeremy Kemper]

    Example:
      alias_method_chain :save!, :validation
    is equivalent to
      alias_method :save_without_validation!, :save!
      alias_method :save!, :save_with_validation!
  

• Enhance Symbol#to_proc so it works with list objects, such as multi-dimensional arrays. Closes 5295 [nov@yo.rim.or.jp]. Example:

    {1 => "one", 2 => "two", 3 => "three"}.sort_by(&:first).map(&:last)
    #=> ["one", "two", "three"]
  

• Added Hash.create_from_xml(string) which will create a hash from a XML string and even typecast if possible [David Heinemeier Hansson]. Example:

    Hash.create_from_xml <<-EOT
      <note>
        <title>This is a note</title>
        <created-at type="date">2004-10-10</created-at>
      </note>
    EOT
  

  …would return:

    { :note => { :title => "This is a note", :created_at => Date.new(2004, 10, 10) } }
  

• Added Jim Weirich‘s excellent FlexMock class to vendor (Copyright 2003, 2004 by Jim Weirich (jim@weriichhouse.org)) — it‘s not automatically required, though, so require ‘flexmock’ is still necessary [David Heinemeier Hansson]
• Fixed that Module#alias_method_chain should work with both foo? foo! and foo at the same time 4954 [anna@wota.jp]
• to_xml fixes, features, and speedup: introduce :dasherize option that converts updated_at to updated-at if true (the existing default); binary columns get encoding="base64" attribute; nil values get nil="true" attribute to distinguish empty values; add type information for float columns; allow arbitrarily deep :include; include SQL type information as the type attribute. 4989 [Blair Zajac <blair@orcaware.com>]
• Add OrderedHash#values. [Sam Stephenson]
• Added Array#to_s(:db) that‘ll produce a comma-separated list of ids [David Heinemeier Hansson]. Example:

    Purchase.find(:all, :conditions => "product_id IN (#{shops.products.to_s(:db)})"
  

• Normalize classify‘s argument to a String so that it plays nice with Symbols. [Marcel Molina Jr.]
• Strip out leading schema name in classify. References 5139. [Michael Schoen]
• Remove Enumerable#first_match since break(value) handles the use case well enough. [Nicholas Seckar]

  Enumerable#first_match was like detect, but instead of returning the matching element, the yielded value returned. For example:

    user_xml = adapters(:from => User, :to => Xml).first_match do |adapter|
      adapter.adapt @user
    end
  

  But this is just as easily done with:

    user_xml = adapters(:from => User, :to => Xml).each do
      break adapter.adapt(@user)
    end
  

• Make Array#in_groups_of just return the grouped collection if a block isn‘t given. [Marcel Molina Jr.]
• Don‘t destroy a HashWithIndifferentAccess if symbolize_keys! or stringify_keys! is called on it. Closes 5076. [Marcel Molina Jr., guy.naor@famundo.com]
• Document Module::delegate. 5002 [pergesu@gmail.com]
• Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
• Strip out punctuation on predicates or bang methods being aliased with alias_method_chain since target?_without_feature is not a valid method name. Add tests for Module#alias_method_chain. [Marcel Molina Jr.]
• Replace Ruby‘s deprecated append_features in favor of included. [Marcel Molina Jr.]
• Allow default options in with_options to be overridden. Closes 4480. [murphy@cYcnus.de]
• Added Module#alias_method_chain [Jamis Buck]
• Updated to Builder 2.0 [David Heinemeier Hansson]
• Add Array#split for dividing arrays into one or more subarrays by value or block. [Sam Stephenson]

*1.3.1* (April 6th, 2006)

• Clean paths inside of exception messages and traces. [Nicholas Seckar]
• Add Pathname.clean_within for cleaning all the paths inside of a string. [Nicholas Seckar]
• provide an empty Dependencies::LoadingModule.load which prints deprecation warnings. Lets 1.0 applications function with .13-style environment.rb.

*1.3.0* (March 27th, 2006)

• When possible, avoid incorrectly obtaining constants from parent modules. Fixes 4221. [Nicholas Seckar]
• Add more tests for dependencies; refactor existing cases. [Nicholas Seckar]
• Move Module#parent and Module#as_load_path into core_ext. Add Module#parent. [Nicholas Seckar]
• Add CachingTools::HashCaching to simplify the creation of nested, autofilling hashes. [Nicholas Seckar]
• Remove a hack intended to avoid unloading the same class twice, but which would not work anyways. [Nicholas Seckar]
• Update Object.subclasses_of to locate nested classes. This affects Object.remove_subclasses_of in that nested classes will now be unloaded. [Nicholas Seckar]
• Update Object.remove_subclasses_of to use Class.remove_class, reducing duplication. [Nicholas Seckar]
• Added Fixnum#seconds for consistency, so you can say 5.minutes + 30.seconds instead of 5.minutes + 30 4389 [François Beausoleil]
• Added option to String#camelize to generate lower-cased camel case by passing in :lower, like "super_man".camelize(:lower) # => "superMan" [David Heinemeier Hansson]
• Added Hash#diff to show the difference between two hashes [Chris McGrath]
• Added Time#advance to do precise time time calculations for cases where a month being approximated to 30 days won‘t do 1860 [Rick Olson]
• Enhance Inflector.underscore to convert ’-’ into ‘_’ (as the inverse of Inflector.dasherize) [Jamis Buck]
• Switched to_xml to use the xml schema format for datetimes. This allows the encoding of time zones and should improve operability. [Michael Koziarski]
• Added a note to the documentation for the Date related Numeric extensions to indicate that they‘re

approximations and shouldn‘t be used for critical calculations. [Michael Koziarski]

• Added Hash#to_xml and Array#to_xml that makes it much easier to produce XML from basic structures [David Heinemeier Hansson]. Examples:

    { :name => "David", :street_name => "Paulina", :age => 26, :moved_on => Date.new(2005, 11, 15) }.to_xml
  

  …returns:

      <person>
        <street-name>Paulina</street-name>
        <name>David</name>
        <age type="integer">26</age>
        <moved-on type="date">2005-11-15</moved-on>
      </person>
  

• Moved Jim Weirich‘s wonderful Builder from Action Pack to Active Support (it‘s simply too useful to be stuck in AP) [David Heinemeier Hansson]
• Fixed that Array#to_sentence will return "" on an empty array instead of ", and" 3842, 4031 [rubyonrails@beautifulpixel.com]
• Add Enumerable#group_by for grouping collections based on the result of some block. Useful, for example, for grouping records by date.

  ex.

     latest_transcripts.group_by(&:day).each do |day, transcripts|
       p "#{day} -> #{transcripts.map(&:class) * ', '}"
     end
     "2006-03-01 -> Transcript"
     "2006-02-28 -> Transcript"
     "2006-02-27 -> Transcript, Transcript"
     "2006-02-26 -> Transcript, Transcript"
  

  Add Array#in_groups_of, for iterating over an array in groups of a certain size.

  ex.

     %w(1 2 3 4 5 6 7).in_groups_of(3) {|g| p g}
     ["1", "2", "3"]
     ["4", "5", "6"]
     ["7", nil, nil]
  

  [Marcel Molina Jr., Sam Stephenson]

• Added Kernel#daemonize to turn the current process into a daemon that can be killed with a TERM signal [David Heinemeier Hansson]
• Add ‘around’ methods to Logger, to make it easy to log before and after messages for a given block as requested in 3809. [Michael Koziarski] Example:

  logger.around_info("Start rendering component (#{options.inspect}): ",

                     "\n\nEnd of component rendering") { yield }
  

• Added Time#beginning_of_quarter 3607 [cohen.jeff@gmail.com]
• Fix Object.subclasses_of to only return currently defined objects [Jonathan Viney <jonathan@bluewire.net.nz>]
• Fix constantize to properly handle names beginning with ’::’. [Nicholas Seckar]
• Make String#last return the string instead of nil when it is shorter than the limit [Scott Barron].
• Added delegation support to Module that allows multiple delegations at once (unlike Forwardable in the stdlib) [David Heinemeier Hansson]. Example:

    class Account < ActiveRecord::Base
      has_one :subscription
      delegate :free?, :paying?, :to => :subscription
      delegate :overdue?, :to => "subscription.last_payment"
    end
  
    account.free?    # => account.subscription.free?
    account.overdue? # => account.subscription.last_payment.overdue?
  

• Fix Reloadable to handle the case where a class that has been ‘removed’ has not yet been garbage collected. [Nicholas Seckar]
• Don‘t allow Reloadable to be included into Modules.
• Remove LoadingModule. [Nicholas Seckar]
• Add documentation for Reloadable::Subclasses. [Nicholas Seckar]
• Add Reloadable::Subclasses which handles the common case where a base class should not be reloaded, but its subclasses should be. [Nicholas Seckar]
• Further improvements to reloading code [Nicholas Seckar, Trevor Squires]
  • All classes/modules which include Reloadable can define reloadable? for fine grained control of reloading
  • Class.remove_class uses Module#parent to access the parent module
  • Class.remove_class expanded to handle multiple classes in a single call
  • LoadingModule.clear! has been removed as it is no longer required
  • Module#remove_classes_including has been removed in favor of Reloadable.reloadable_classes
• Added reusable reloading support through the inclusion of the Relodable module that all subclasses of ActiveRecord::Base, ActiveRecord::Observer, ActiveController::Base, and ActionMailer::Base automatically gets. This means that these classes will be reloaded by the dispatcher when Dependencies.mechanism = :load. You can make your own models reloadable easily:

    class Setting
      include Reloadable
    end
  

  Reloading a class is done by removing its constant which will cause it to be loaded again on the next reference. [David Heinemeier Hansson]

• Added auto-loading support for classes in modules, so Conductor::Migration will look for conductor/migration.rb and Conductor::Database::Settings will look for conductor/database/settings.rb [Nicholas Seckar]
• Add Object#instance_exec, like instance_eval but passes its arguments to the block. (Active Support will not override the Ruby 1.9 implementation of this method.) [Sam Stephenson]
• Add Proc#bind(object) for changing a proc or block‘s self by returning a Method bound to the given object. Based on why the lucky stiff‘s "cloaker" method. [Sam Stephenson]
• Fix merge and dup for hashes with indifferent access 3404 [Ken Miller]
• Fix the requires in option_merger_test to unbreak AS tests. [Sam Stephenson]
• Make HashWithIndifferentAccess#update behave like Hash#update by returning the hash. 3419, 3425 [asnem@student.ethz.ch, JanPrill@blauton.de, Marcel Molina Jr.]
• Add ActiveSupport::JSON and Object#to_json for converting Ruby objects to JSON strings. [Sam Stephenson]
• Add Object#with_options for DRYing up multiple calls to methods having shared options. [Sam Stephenson] Example:

  ActionController::Routing::Routes.draw do |map|

    # Account routes
    map.with_options(:controller => 'account') do |account|
      account.home   '',       :action => 'dashboard'
      account.signup 'signup', :action => 'new'
      account.logout 'logout', :action => 'logout'
    end
  

  end

• Introduce Dependencies.warnings_on_first_load setting. If true, enables warnings on first load of a require_dependency. Otherwise, loads without warnings. Disabled (set to false) by default. [Jeremy Kemper]
• Active Support is warnings-safe. 1792 [Eric Hodel]
• Introduce enable_warnings counterpart to silence_warnings. Turn warnings on when loading a file for the first time if Dependencies.mechanism == :load. Common mistakes such as redefined methods will print warnings to stderr. [Jeremy Kemper]
• Add Symbol#to_proc, which allows for, e.g. [:foo, :bar].map(&:to_s). [Marcel Molina Jr.]
• Added the following methods [Marcel Molina Jr., Sam Stephenson]:
  • Object#copy_instance_variables_from(object) to copy instance variables from one object to another
  • Object#extended_by to get an instance‘s included/extended modules
  • Object#extend_with_included_modules_from(object) to extend an instance with the modules from another instance

*1.2.5* (December 13th, 2005)

• Become part of Rails 1.0
• Rename Version constant to VERSION. 2802 [Marcel Molina Jr.]

*1.2.3* (November 7th, 2005)

• Change Inflector#constantize to use eval instead of const_get. [Nicholas Seckar]
• Fix const_missing handler to ignore the trailing ’.rb’ on files when comparing paths. [Nicholas Seckar]
• Define kernel.rb methods in "class Object" instead of "module Kernel" to work around a Windows peculiarity [Sam Stephenson]
• Fix broken tests caused by incomplete loading of active support. [Nicholas Seckar]
• Fix status pluralization bug so status_codes doesn‘t get pluralized as statuses_code. 2758 [keithm@infused.org]
• Added Kernel#silence_stderr to silence stderr for the duration of the given block [Sam Stephenson]
• Changed Kernel#` to print a message to stderr (like Unix) instead of raising Errno::ENOENT on Win32 [Sam Stephenson]
• Changed 0.blank? to false rather than true since it violates everyone‘s expectation of blankness. 2518, 2705 [rails@jeffcole.net]
• When loading classes using const_missing, raise a NameError if and only if the file we tried to load was not present. [Nicholas Seckar]
• Added petabytes and exebytes to numeric extensions 2397 [timct@mac.com]
• Added Time#end_of_month to accompany Time#beginning_of_month 2514 [Jens-Christian Fischer]

*1.2.2* (October 26th, 2005)

• Set Logger.silencer = false to disable Logger#silence. Useful for debugging fixtures.
• Add title case method to String to do, e.g., ‘action_web_service’.titlecase # => ‘Action Web Service’. [Marcel Molina Jr.]

*1.2.1* (October 19th, 2005)

• Classify generated routing code as framework code to avoid appearing in application traces. [Nicholas Seckar]
• Show all framework frames in the framework trace. [Nicholas Seckar]

*1.2.0* (October 16th, 2005)

• Update Exception extension to show the first few framework frames in an application trace. [Nicholas Seckar]
• Added Exception extension to provide support for clean backtraces. [Nicholas Seckar]
• Updated whiny nil to be more concise and useful. [Nicholas Seckar]
• Added Enumerable#first_match [Nicholas Seckar]
• Fixed that Time#change should also reset usec when also resetting minutes 2459 [ikeda@dream.big.or.jp]
• Fix Logger compatibility for distributions that don‘t keep Ruby and its standard library in sync.
• Replace ’%e’ from long and short time formats as Windows does not support it. 2344. [Tom Ward <tom@popdog.net>]
• Added to_s(:db) to Range, so you can get "BETWEEN ‘2005-12-10’ AND ‘2005-12-12’" from Date.new(2005, 12, 10)..Date.new(2005, 12, 12) (and likewise with Times)
• Moved require_library_or_gem into Kernel. 1992 [Michael Schuerig <michael@schuerig.de>]
• Add :rfc822 as an option for Time#to_s (to get rfc822-formatted times)
• Chain the const_missing hook to any previously existing hook so rails can play nicely with rake
• Clean logger is compatible with both 1.8.2 and 1.8.3 Logger. 2263 [Michael Schuerig <michael@schuerig.de>]
• Added native, faster implementations of .blank? for the core types 2286 [skae]
• Fixed clean logger to work with Ruby 1.8.3 Logger class 2245
• Fixed memory leak with Active Record classes when Dependencies.mechanism = :load 1704 [Chris McGrath]
• Fixed Inflector.underscore for use with acronyms, so HTML becomes html instead of htm_l 2173 [k@v2studio.com]
• Fixed dependencies related infinite recursion bug when a controller file does not contain a controller class. Closes 1760. [rcolli2@tampabay.rr.com]
• Fixed inflections for status, quiz, move 2056 [deirdre@deirdre.net]
• Added Hash#reverse_merge, Hash#reverse_merge!, and Hash#reverse_update to ease the use of default options
• Added Array#to_sentence that‘ll turn [‘one’, ‘two’, ‘three’] into "one, two, and three" 2157 [Manfred Stienstra]
• Added Kernel#silence_warnings to turn off warnings temporarily for the passed block
• Added String#starts_with? and String#ends_with? 2118 [Thijs van der Vossen]
• Added easy extendability to the inflector through Inflector.inflections (using the Inflector::Inflections singleton class). Examples:

    Inflector.inflections do |inflect|
      inflect.plural /^(ox)$/i, '\1\2en'
      inflect.singular /^(ox)en/i, '\1'
  
      inflect.irregular 'octopus', 'octopi'
  
      inflect.uncountable "equipment"
    end
  

• Added String#at, String#from, String#to, String#first, String#last in ActiveSupport::CoreExtensions::String::Access to ease access to individual characters and substrings in a string serving basically as human names for range access.
• Make Time#last_month work when invoked on the 31st of a month.
• Add Time.days_in_month, and make Time#next_month work when invoked on the 31st of a month
• Fixed that Time#midnight would have a non-zero usec on some platforms 1836
• Fixed inflections of "index/indices" 1766 [damn_pepe@gmail.com]
• Added stripping of _id to String#humanize, so "employee_id" becomes "Employee" 1574 [Justin French]
• Factor Fixnum and Bignum extensions into Integer extensions [Nicholas Seckar]
• Hooked ordinalize into Fixnum and Bignum classes. [Nicholas Seckar, danp]
• Added Fixnum#ordinalize to turn 1.ordinalize to "1st", 3.ordinalize to "3rd", and 10.ordinalize to "10th" and so on 1724 [paul@cnt.org]

*1.1.1* (11 July, 2005)

• Added more efficient implementation of the development mode reset of classes 1638 [Chris McGrath]

*1.1.0* (6 July, 2005)

• Fixed conflict with Glue gem 1606 [Rick Olson]
• Added new rules to the Inflector to deal with more unusual plurals mouse/louse => mice/lice, information => information, ox => oxen, virus => viri, archive => archives 1571, 1583, 1490, 1599, 1608 [foamdino@gmail.com/others]
• Fixed memory leak with Object#remove_subclasses_of, which inflicted a Rails application running in development mode with a ~20KB leak per request 1289 [Chris McGrath]
• Made 1.year == 365.25.days to account for leap years. This allows you to do User.find(:all, :conditions => [‘birthday > ?’, 50.years.ago]) without losing a lot of days. 1488 [tuxie@dekadance.se]
• Added an exception if calling id on nil to WhinyNil 584 [kevin-temp@writesoon.com]
• Added Fix/Bignum#multiple_of? which returns true on 14.multiple_of?(7) and false on 16.multiple_of?(7) 1464 [Thomas Fuchs]
• Added even? and odd? to work with Bignums in addition to Fixnums 1464 [Thomas Fuchs]
• Fixed Time#at_beginning_of_week returned the next Monday instead of the previous one when called on a Sunday 1403 [jean.helou@gmail.com]
• Increased the speed of indifferent hash access by using Hash#default. 1436 [Nicholas Seckar]
• Added that " " is now also blank? (using strip if available)
• Fixed Dependencies so all modules are able to load missing constants 1173 [Nicholas Seckar]
• Fixed the Inflector to underscore strings containing numbers, so Area51Controller becomes area51_controller 1176 [Nicholas Seckar]
• Fixed that HashWithIndifferentAccess stringified all keys including symbols, ints, objects, and arrays 1162 [Nicholas Seckar]
• Fixed Time#last_year to go back in time, not forward 1278 [fabien@odilat.com]
• Fixed the pluralization of analysis to analyses 1295 [seattle@rootimage.msu.edu]
• Fixed that Time.local(2005,12).months_since(1) would raise "ArgumentError: argument out of range" 1311 [jhahn@niveon.com]
• Added silencing to the default Logger class

*1.0.4* (19th April, 2005)

• Fixed that in some circumstances controllers outside of modules may have hidden ones inside modules. For example, admin/content might have been hidden by /content. 1075 [Nicholas Seckar]
• Fixed inflection of perspectives and similar words 1045 [Thijs van der Vossen]
• Added Fixnum#even? and Fixnum#odd?
• Fixed problem with classes being required twice. Object#const_missing now uses require_dependency to load files. It used to use require_or_load which would cause models to be loaded twice, which was not good for validations and other class methods 971 [Nicholas Seckar]

*1.0.3* (27th March, 2005)

• Fixed Inflector.pluralize to handle capitalized words 932 [Jeremy Kemper]
• Added Object#suppress which allows you to make a saner choice around with exceptions to swallow 980. Example:

    suppress(ZeroDivisionError) { 1/0 }
  

  …instead of:

    1/0 rescue nil # BAD, EVIL, DIRTY.
  

*1.0.2* (22th March, 2005)

• Added Kernel#returning — a Ruby-ized realization of the K combinator, courtesy of Mikael Brockman.

    def foo
      returning values = [] do
        values << 'bar'
        values << 'baz'
      end
    end
  
    foo # => ['bar', 'baz']
  

*1.0.1* (7th March, 2005)

• Fixed Hash#indifferent_access to also deal with include? and fetch and nested hashes 726 [Nicholas Seckar]
• Added Object#blank? — see redhanded.hobix.com/inspect/objectBlank.html 783 [_why the lucky stiff]
• Added inflection rules for "sh" words, like "wish" and "fish" 755 [phillip@pjbsoftware.com]
• Fixed an exception when using Ajax based requests from Safari because Safari appends a \000 to the post body. Symbols can‘t have \000 in them so indifferent access would throw an exception in the constructor. Indifferent hashes now use strings internally instead. 746 [Tobias Lütke]
• Added String#to_time and String#to_date for wrapping ParseDate

*1.0.0* (24th February, 2005)

• Added TimeZone as the first of a number of value objects that among others Active Record can use rich value objects using composed_of 688 [Jamis Buck]
• Added Date::Conversions for getting dates in different convenient string representations and other objects
• Added Time::Conversions for getting times in different convenient string representations and other objects
• Added Time::Calculations to ask for things like Time.now.tomorrow, Time.now.yesterday, Time.now.months_ago(4) 580 [DP|Flurin]. Examples:

    "Later today"         => now.in(3.hours),
    "Tomorrow morning"    => now.tomorrow.change(:hour => 9),
    "Tomorrow afternoon"  => now.tomorrow.change(:hour => 14),
    "In a couple of days" => now.tomorrow.tomorrow.change(:hour => 9),
    "Next monday"         => now.next_week.change(:hour => 9),
    "In a month"          => now.next_month.change(:hour => 9),
    "In 6 months"         => now.months_since(6).change(:hour => 9),
    "In a year"           => now.in(1.year).change(:hour => 9)
  

• Upgraded to breakpoint 92 which fixes:

    * overload IRB.parse_opts(), fixes #443
      => breakpoints in tests work even when running them via rake
    * untaint handlers, might fix an issue discussed on the Rails ML
    * added verbose mode to breakpoint_client
    * less noise caused by breakpoint_client by default
    * ignored TerminateLineInput exception in signal handler
      => quiet exit on Ctrl-C
  

• Fixed Inflector for words like "news" and "series" that are the same in plural and singular 603 [echion], 615 [marcenuc]
• 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.constantize to turn "Admin::User" into a reference for the constant Admin::User
• Added that Inflector.camelize and Inflector.underscore can deal with modules like turning "Admin::User" into "admin/user" and back
• Added Inflector.humanize to turn attribute names like employee_salary into "Employee salary". Used by automated error reporting in AR.
• Added availability of class inheritable attributes to the masses 477 [Jeremy Kemper]

    class Foo
      class_inheritable_reader :read_me
      class_inheritable_writer :write_me
      class_inheritable_accessor :read_and_write_me
      class_inheritable_array :read_and_concat_me
      class_inheritable_hash :read_and_update_me
    end
  
    # Bar gets a clone of (not a reference to) Foo's attributes.
    class Bar < Foo
    end
  
    Bar.read_and_write_me == Foo.read_and_write_me
    Bar.read_and_write_me = 'bar'
    Bar.read_and_write_me != Foo.read_and_write_me
  

• Added Inflections as an extension on String, so Inflector.pluralize(Inflector.classify(name)) becomes name.classify.pluralize 476 [Jeremy Kemper]
• Added Byte operations to Numeric, so 5.5.megabytes + 200.kilobytes 461 [Marcel Molina Jr.]
• Fixed that Dependencies.reload can‘t load the same file twice 420 [Kent Sibilev]
• Added Fixnum#ago/until, Fixnum#since/from_now 450 [Jeremy Kemper]
• Added that Inflector now accepts Symbols and Classes by calling .to_s on the word supplied
• Added time unit extensions to Fixnum that‘ll return the period in seconds, like 2.days + 4.hours.