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2.5

Due in about 5 months (12/25/2017)

72%

50 issues   (36 closed — 14 open)

ReleaseEngineering25

see also version independent topics.

Ruby 2.5

  • Status: developing
  • release manager: naruse
  • ABI Version: 2.5.0

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Notable changes

Checklist for Releasing

  • without baseruby
  • ruby-build
  • cross compile

FAQ

Related issues
Feature #2631: Allow IO#reopen to take a block
Feature #8631: Add a new method to ERB to allow assigning the local variables from a hash
Feature #9323: IO#writev
Feature #9456: Include bin/racc with ruby
Feature #10169: It might be better to make Mathn class deprecated
Feature #11575: Blocks in ERB don't work as intended?
Feature #11624: ERB deserves its own commenting token
Feature #12733: Bundle bundler to ruby core
Feature #12906: do/end blocks work with ensure/rescue/else
Feature #12973: [RFC] net/http: use require_relative to reduce syscalls
Feature #13124: Should #puts convert to external encoding?
Feature #13173: Gemify webrick
Feature #13177: Gemify csv
Feature #13182: Gemify cmath
Feature #13183: Gemify date
Feature #13186: Gemify zlib
Feature #13197: Gemify fileutils
Feature #13199: Gemify strscan
Feature #13201: Gemify dbm
Feature #13206: Gemify fcntl
Feature #13213: Gemify scanf
Feature #13256: Gemify etc
Feature #13261: Gemify sdbm
Feature #13334: Removed deprecated mathn extentions.
Feature #13335: Gemify mathn
Feature #13403: Gemify fiddle
Feature #13483: TracePoint#enable with block for thread-local trace
Feature #13504: Document the Warning module and warn method
Feature #13505: circular require prints the backtrace directly to stderr
Feature #13508: How remove/refactor code related mathn library.
Feature #13552: [PATCH 0/2] reimplement ConditionVariable, Queue, SizedQueue using ccan/list
Feature #13685: Update Unicode data to Unicode Version 10.0.0
Feature #13696: Add exchange and noreplace options to File.rename
Feature #13743: Support linking of files opened with O_TMPFILE

next minor

Due in over 18 years (12/25/2035)

next minor release of Ruby: 2.x

40%

534 issues   (204 closed — 330 open)

Related issues
Feature #614: instance_method(ancestor)
Feature #836: Patches for StringScanner, adding #size, #captures and #values_at
Feature #855: HTTP/1.1 fixes and other enhancements to webrick
Feature #908: Should be an easy way of reading N characters from am I/O stream
Feature #1436: Please consider this addition to resolv.rb which adds methods for resolving LOC resources
Feature #1873: MatchData#[]: Omits All But Last Captures Corresponding to the Same Named Group
Feature #2034: Consider the ICU Library for Improving and Expanding Unicode Support
Feature #2074: json の j や jj は module_function にするべき？
Feature #2080: Proc#to_source, Method#to_source
Feature #2149: Pathname#include?
Feature #2152: Split functionality of Float#inspect and Float#to_s
Feature #2323: "Z".."Z".succが空
Feature #2324: Dir instance methods for relative path
Feature #2348: RBTree Should be Added to the Standard Library
Feature #2447: reduce GC pressure by symbol table without String instance
Feature #2509: Recursive freezing?
Feature #2542: URI lib should be updated to RFC 3986
Feature #2673: the length for an enumerator generated by Array#permutation and Array#combination
Feature #2710: Kernel#load loads a relative path
Feature #2715: Optimization to avoid spawning shell in Kernel#system call should check for failure conditions
Feature #2740: Extend const_missing to pass in the nesting
Feature #2832: Vector#each and Enumerable
Feature #2837: Compile-time constant for HEAP_GROWTH_FACTOR (patch attached)
Feature #2968: 数値の正負を返すメソッド
Feature #3067: complex.c : Question: why Complex#~ is disabled? It's in the doc
Feature #3072: Classes Inheriting from Data
Feature #3163: SyntaxError when using variable which is also a method in current scope with a Symbol argument
Feature #3219: assert now passes non-boolean result
Feature #3269: BigMath.tan がない
Feature #3300: onig_number_of_captures に相当するメソッド Regexp#ncapture
Feature #3328: Kernel#p outputs as default_internal encoding, and so on
Feature #3333: mkmf (have|find)_cxx_header
Feature #3388: regexp support for start_with? and end_with?
Feature #3447: argument delegation
Feature #3450: Format Strings with Named Arguments & Hash#default
Feature #3591: Adding Numeric#divisor? (Have working implementation)
Feature #3608: Enhancing Pathname#each_child to be lazy
Feature #3620: Add Queue, SIzedQueue and ConditionVariable implementations in C in addition to ruby ones
Feature #3647: Array#sample(n, replace=false)
Feature #3653: Diferential behaviour of positives and negatives ranges as subindex of string or arrays.
Feature #3685: Struct does not define #to_ary, needed for implicit-splat.
Feature #3697: [PATCH] Allow build of dbm extension with Berkeley DB 5.0 series (for 1.9.2_rc2)
Feature #3711: IPAddr must not make DNS lookups via IPSocket.getaddress
Feature #3714: Add getters for Enumerator
Feature #3719: open-uri should allow redirects from http to https
Feature #3731: Easier Embedding API for Ruby
Feature #3809: allow multiple set_trace_func() calls
Feature #3848: Using http basic authentication for FTP with Open URI
Feature #3901: WIN32OLE_VARIANT.new method lacks consistency
Feature #3916: Add flag to ruby to make warnings fatal.
Feature #3946: Array#packのqQ指定子に機種依存サイズフラグ!を追加
Feature #3953: TCPSocket / UDPSocket do not accept IPAddr objects.
Feature #4017: [PATCH] CSV parsing speedup
Feature #4046: Saving C's **argv and cwd allows Ruby programs to reliably restart themselves
Feature #4052: File.lutime Patch
Feature #4095: C1 Coverage
Feature #4151: Enumerable#categorize
Feature #4189: FileUtils#ln_r
Feature #4195: option for Socket#sendmsg
Feature #4211: Converting the Ruby and C API documentation to YARD syntax
Feature #4233: autoload Can't Require Gems
Feature #4247: New features for Array#sample, Array#choice
Feature #4264: General type coercion protocol for Ruby
Feature #4269: command with && should execute as shell
Feature #4270: Resolv does not handle UTF8 domain names.
Feature #4276: Allow use of quotes in symbol syntactic sugar for hashes
Feature #4299: no warning: found = in conditional, should be ==
Feature #4464: [PATCH] add Fcntl::Flock object for easier use of POSIX file locks
Feature #4475: default variable name for parameter
Feature #4483: PStoreをデフォルトで複数のスレッドから扱えるようにしたい
Feature #4513: allow whitespace following EOL continuation backslash
Feature #4514: #deep_clone and #deep_dup for Objects
Feature #4521: NoMethodError#message may take very long to execute
Feature #4532: [PATCH] add IO#pread and IO#pwrite methods
Feature #4539: Array#zip_with
Feature #4541: Inconsistent Array.slice()
Feature #4553: Add Set#pick and Set#pop
Feature #4560: [PATCH] lib/net/protocol.rb: avoid exceptions in rbuf_fill
Feature #4589: add Queue#each() method and include Enumerable
Feature #4592: Tempfileを直接保存したい
Feature #4645: Pass existing buffer to getsockopt
Feature #4646: [PATCH] io/wait: add IO#wait_writable method
Feature #4712: File.writable? inaccurate in windows
Feature #4772: Hash#add_keys
Feature #4780: String#split with a block
Feature #4788: resolv.rb refactoring
Feature #4801: Shorthand Hash Syntax for Strings
Feature #4818: Add method marshalable?
Feature #4824: Provide method Kernel#executed?
Feature #4830: Provide Default Variables for Array#each and other iterators
Feature #4831: Integer#prime_factors
Feature #4849: io/wait should have a way to avoid FIONREAD
Feature #4907: enumerable#permutation and combination
Feature #4910: Classes as factories
Feature #4921: Remove intern.h
Feature #4924: mkmf have_header fails with C++ headers
Feature #4935: Quoted Label Form for 1.9 Hashes
Feature #4938: Add Random.bytes [patch]
Feature #4968: BigDecimal#sqrt は BigMath.sqrt へ移動すべき
Feature #4976: Pathname#=~ が undef されている理由
Feature #4978: forwardable: support for 'delegate :method => :accessor'
Feature #4990: Proposal: Internal GC/memory subsystem API
Feature #5005: Provide convenient access to original methods
Feature #5007: Proc#call_under: Unifying instance_eval and instance_exec
Feature #5010: Add Slop(-like) in stdlib and deprecate current OptionParser API
Feature #5044: #zip with block return mapped results
Feature #5064: HTTP user-agent class
Feature #5129: Create a core class "FileArray" and make "ARGF" its instance
Feature #5133: Array#unzip as an alias of Array#transpose
Feature #5138: Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK
Feature #5145: Function extension of Array#transpose
Feature #5174: Export ruby_init_prelude()
Feature #5206: ruby -K should warn
Feature #5231: Allow to disable versioned paths
Feature #5281: Support for custom sitearch and vendorarch directories
Feature #5310: Integral objects
Feature #5313: Please drop IRB's version in favour of Ruby version
Feature #5321: Introducing Numeric#exact? and Numeric#inexact?
Feature #5360: BasicObject#binding
Feature #5373: SMTP - new method
Feature #5378: Prime.each is slow
Feature #5382: %r{…} and similar delimited strings, arrays, and regexps aren’t highlighted in ruby-mode
Feature #5389: New method Enumerator#iterate
Feature #5392: Symbol GC
Feature #5394: Anonymous Symbols, Anonymous Methods
Feature #5434: Allow per-class whitelisting of methods safe to expose through DRb
Feature #5445: Need RUBYOPT -r before ARGV -r
Feature #5448: Singleton module's ::instance method should forward parameters
Feature #5461: Add pipelining to Net::HTTP
Feature #5481: Gemifying Ruby standard library
Feature #5534: Redefine Range class and introduce RelativeNumeric and RelativeRange
Feature #5558: String#% strange arity errors
Feature #5582: Allow clone of singleton methods on a BasicObject
Feature #5588: add negation flag (v) to Regexp
Feature #5606: String#each_match(regexp)
Feature #5607: Inconsistent reaction in Range of String
Feature #5617: Allow install RubyGems into dediceted directory
Feature #5628: Module#basename
Feature #5630: Missing custom transfer modes in Net::FTP
Feature #5643: require/load options and binding option
Feature #5644: add Enumerable#exclude? antonym
Feature #5654: Introduce global lock to avoid concurrent require
Feature #5663: Combined map/select method
Feature #5673: undef_method probably doesn't need to raise an error
Feature #5677: IO C API
Feature #5707: temporary file creation without finalizer and delegate.
Feature #5735: Extending the use of splat operator to when it is inside a hash
Feature #5741: Secure Erasure of Passwords
Feature #5749: new method String#match_all needed
Feature #5778: Allow WEBrick::HTTPResponse to send IO-duck-typed bodies
Feature #5781: Query attributes (attribute methods ending in `?` mark)
Feature #5788: Thread#at_exit
Feature #5798: Range#include? needs some optimization
Feature #5805: object_hexid
Feature #5809: Benchmark#bm: remove the label_width parameter
Feature #5856: Feature: Raise any object
Feature #5866: ValidationError
Feature #5945: Add the ability to mark a at_exit as process-local.
Feature #5970: Add Enumerable#join with same semantics as Array#join
Feature #5980: Trying to Load File When Too Many Files Open Should Raise Something Other Than Plain LoadError
Feature #5987: IPAddr#initialize should display the invalid address when raising ArgumentError
Feature #5995: calling io_advise_internal() in read_all()
Feature #6003: test/unit/parallel.rb
Feature #6012: Proc#source_location also return the column
Feature #6023: Add "a ?= 2" support for meaning "a = a.nil? ? 2 : a"
Feature #6065: Allow Bignum marshalling/unmarshalling from C API
Feature #6074: Allow alias arguments to have a comma
Feature #6111: Request for making ruby multiarchable
Feature #6118: Hash#keys_of(values), returns related keys of given values
Feature #6129: String#each_lineにおけるmemmem()の利用
Feature #6154: Eliminate extending WaitReadable/Writable at runtime
Feature #6198: public/protected/private with attr_*
Feature #6210: load should provide a way to specify the top-level module
Feature #6216: SystemStackError backtraces should not be reduced to one line
Feature #6225: Hash#+
Feature #6240: Enumerable#drop with negative argument
Feature #6241: Module#method_defined? with inherited flag
Feature #6256: Slightly improve ruby_qsort performance
Feature #6263: Simple access to toplevel object (main)
Feature #6277: Hash#convert_key
Feature #6293: new queue / blocking queues
Feature #6315: handler to trace output of each line of code executed
Feature #6317: Range#cover?の引数としてRangeインスタンスを受けられるようにして欲しい
Feature #6321: Find and repair bad bytes in encodings, without transcoding
Feature #6337: FileUtils#sync
Feature #6354: Remove escape (break/return/redo/next support) from class/module scope
Feature #6362: Modular exponentiation/inverse
Feature #6367: #same? for Enumerable
Feature #6376: Feature lookup and checking if feature is loaded
Feature #6394: Support SO_ORIGINAL_DST socket option
Feature #6399: IO.read ignores valid open_args on Windows
Feature #6413: Make Dir.entries default to Dir.entries(Dir.pwd)
Feature #6414: Destructuring Assignment
Feature #6442: CRUDify Hash class
Feature #6444: alias for String#index
Feature #6445: request for default length/position on string index
Feature #6470: Make attr_accessor return the list of generated method
Feature #6478: BasicObject#__class__
Feature #6483: parametric map
Feature #6507: File Literal
Feature #6515: array.c: added method that verifies if an Array is part of another
Feature #6528: Add Pathname#write and Pathname#binwrite
Feature #6561: ?= operator
Feature #6583: Improve socket exception message when bind() fails
Feature #6588: Set#intersect?
Feature #6589: Set#rehash
Feature #6590: Dealing with bigdecimal, etc gems in JRuby
Feature #6596: New method for Arrays : Array#index
Feature #6602: Tail call optimization: enable by default?
Feature #6611: Comments requested on implementation of set_parse_func
Feature #6613: VT_RECORD, IRecordInfo Support in WIN32OLE
Feature #6626: Readline.delete_text
Feature #6641: Hash.auto constructor
Feature #6643: io.seek(off, :end)
Feature #6648: Provide a standard API for retrieving all command-line flags passed to Ruby
Feature #6669: A method like Hash#map but returns hash
Feature #6671: File.split_all and File.split_root
Feature #6682: Add a method to return an instance attached by a singleton class
Feature #6687: Enumerable#with
Feature #6693: Don't warn for unused variables starting with _
Feature #6694: Thread.new without block.
Feature #6695: Configuration for Thread/Fiber creation
Feature #6697: [PATCH] Add Kernel#Symbol conversion method like String(), Array() etc.
Feature #6707: Remove checks for Ruby 1.9 in trunk
Feature #6710: new special binding specifier :isolated
Feature #6714: Code injection framework
Feature #6727: Add Array#rest (with implementation)
Feature #6737: Add Hash#read and alias as #[].
Feature #6752: Replacing ill-formed subsequencce
Feature #6758: Object#sequence
Feature #6792: request for easier system properties access
Feature #6793: easier ability to "run as the currently running ruby"
Feature #6802: String#scan should have equivalent yielding MatchData
Feature #6808: Implicit index for enumerations
Feature #6811: File, Dir and FileUtils should have bang-versions of singleton methods that fails silently
Feature #6817: Partial application
Feature #6823: Where/how should ruby-mode issues be reported?
Feature #6824: StopIteration gets a source method
Feature #6847: Hash#extract
Feature #6857: bigdecimal/math BigMath.E/BigMath.exp R. P. Feynman inspired optimization
Feature #6973: Add an #integral? method to Numeric to test for whole-number values
Feature #7022: add event hook for garbage collection
Feature #7051: Extend caller_locations API to include klass and bindings. Allow caller_locations as a method hanging off Thread.
Feature #7060: Broaden support for chmod
Feature #7068: ability to deactivate Hash#compare_by_identity()
Feature #7075: const_get でトップレベルの定数を参照する時に警告
Feature #7082: Process.kill 0 in windows can return spurious success
Feature #7086: ConditionVariable#wait has meaningless return value
Feature #7087: ::ConditionVariable#wait does not work with Monitor because Monitor#sleep does not exist
Feature #7106: FileUtils.touch should allow touching the symlink itself rather than the file the link points to
Feature #7114: New classes: `HumanTime::LocalTime`, `HumanTime::Duration`
Feature #7121: Extending the use of `require'
Feature #7132: Alternation between named / ordered method arguments and aliases for method arguments.
Feature #7145: Add string-based range support to IMAP library
Feature #7149: Constant magic for everyone.
Feature #7226: Add Set#join method as a shortcut for to_a.join
Feature #7240: Inheritable #included/#extended Hooks For Modules
Feature #7250: A mechanism to include at once both instance-level and class-level methods from a module
Feature #7252: version number of 2.0 release
Feature #7274: UnboundMethods should be bindable to any object that is_a?(owner of the UnboundMethod)
Feature #7280: How to set filesystem encoding
Feature #7292: Enumerable#to_h
Feature #7309: HEREDOC end of line or similar
Feature #7321: Newton.#nsolve の第 2 引数が複数の役割を持つ
Feature #7336: Flexiable OPerator Precedence
Feature #7340: 'each_with' or 'into' alias for 'each_with_object'
Feature #7341: Enumerable#associate
Feature #7349: Struct#inspect needs more meaningful output
Feature #7362: Adding Pathname#start_with?
Feature #7368: rb_str_each_line()のパフォーマンス向上とリファクタリング
Feature #7377: #indetical? as an alias for #equal?
Feature #7378: Adding Pathname#write
Feature #7384: Rename #each_with_object to #each_with
Feature #7388: Object#embed
Feature #7394: Enumerable#find ifnone parameter could be non-callable
Feature #7396: encode location header
Feature #7399: Add tests for PKCS7#type= and add_data.
Feature #7401: Pathname#cleanpath default consider_symlink to true
Feature #7424: an embedded Ruby interpreter doesn't get the full Ruby environment unless it calls ruby_process_options() (which is not documented)
Feature #7434: Allow caller_locations and backtrace_locations to receive negative params
Feature #7435: Exceptions should have backtrace_locations
Feature #7436: Allow for a "granularity" flag for backtrace_locations
Feature #7444: Array#product_set
Feature #7488: Receiving object_id in object creation probes
Feature #7503: make timeout.rb async-interrupt safe by default
Feature #7505: Mutex#owned? メソッドの新設
Feature #7517: Fixnum::MIN,MAX
Feature #7532: Hardcoded compiler location
Feature #7548: Load and Require Callbacks
Feature #7580: Range translation
Feature #7596: Find::find should not silently ignores errors
Feature #7604: Make === comparison operator ability to delegate comparison to an argument
Feature #7609: Class#singleton_class?
Feature #7611: Focal method for all loads/requires
Feature #7614: alias_accessor
Feature #7652: Add FreeMiNT support to Ruby
Feature #7654: Add optional code block to IO::readlines
Feature #7657: Array#& doesn't accept Enumerables
Feature #7677: YAML load mode that does instantiate Ruby
Feature #7684: Net::HTTPHeader#set_form_data should accept a String
Feature #7704: Add a list of enabled (experimental) language features.
Feature #7708: support for patches list
Feature #7712: Add .txt extensions to all plain-text documentation files for Windows users
Feature #7730: Top level variables aren't checked for assigned but unused behavior
Feature #7739: Define Hash#| as Hash#reverse_merge in Rails
Feature #7745: lib/observer.rb: Observers are compared by identity
Feature #7763: add Win32::Registry#values
Feature #7767: Tempfileで自動的にファイルを削除する
Feature #7788: YAML Tag Schema Support
Feature #7791: Let symbols be garbage collected
Feature #7795: Symbol.defined? and/or to_existing_symbol
Feature #7816: Don't invalidate method caches when defining a new method on a class without subclasses
Feature #7839: Symbol.freeze_symbols
Feature #7848: Restore default state for core ruby objects
Feature #7849: Symbol#to_str
Feature #7854: New method Symbol[string]
Feature #7872: `block_given?` does not work inside `define_method`
Feature #7876: Add method for accessing Class from within Singleton Class
Feature #7883: Add Regex#to_proc
Feature #7914: Case for local class methods
Feature #7923: Queue#push and Queue#pop makes trap safe
Feature #7939: Alternative curry function creation
Feature #7978: boolean to_i
Feature #7998: "def" should return a value (the symbol of the method name) instead of nil
Feature #8016: Alias __FILE__ and __LINE__ as methods
Feature #8042: Add Addrinfo#socket to create a socket that is not connected or bound
Feature #8046: allow Object#extend to take a block
Feature #8053: Make coercion if #=== operator doesn't know what to do
Feature #8061: 重複するキーワードをエラーにする
Feature #8062: Argument error stack trace to specify the 'called' method
Feature #8090: resolv.rb checks platform based on RUBY_PLATFORM, which is insufficient for JRuby
Feature #8217: OpenSSL::BN.new with integers
Feature #8264: define struct under the given namespace
Feature #8295: Float や Rational から（可能であれば）正確な BigDecimal を生成する機能
Feature #8459: Idiomatic method names for Socket
Feature #8536: Implement is_numeric? family of methods
Feature #8572: Fiber should be a Enumerable
Feature #8573: Add String#format method(not an alias of String#%)
Feature #8576: Add optimized method type for constant value methods
Feature #8600: Recognize variables declared in if modifier at end of line
Feature #8639: Add Queue#each
Feature #8657: Make Find.find respect the encodings of arguments
Feature #8725: Possibility to get a signal handler without changing it
Feature #8734: irbに複数行履歴機能が欲しい
Feature #8772: Hash alias #| merge, and the case for Hash and Array polymorphism
Feature #8781: Use require_relative() instead of require() if possible
Feature #8788: use eventfd on newer Linux instead of pipe for timer thread
Feature #8804: ONCE syntax
Feature #8820: Speed up Array#index
Feature #8823: Run trap handler in an independent thread called "Signal thread"
Feature #8850: Convert Rational to decimal string
Feature #9020: Net::HTTPResponse predicate/query methods
Feature #9047: Alternate hash key syntax for symbols
Feature #9330: [PATCH 0/3] avoid redundant fcntl/fstat syscalls for cloexec sockets
Feature #9487: Add #dup?, #dup! and #clone? and #clone!
Feature #9778: Bring shortcut methods to Hash
Feature #10480: Allow a catch-all approach to capture throws and rethrow them in a separate context
Feature #10490: A Proposal to add Method "factorial" to the Fixnum and Bignum Classes
Misc #10469: Documented return value for Array#each

Next Major

Due in over 20 years (01/19/2038)

Next major release of Ruby: 3.0

44%

101 issues   (44 closed — 57 open)

Related issues
Feature #1586: Including a module already present in ancestors should not be ignored
Feature #1644: recv on inherited socket wrapped in TCPSocket does not read data, on Windows
Feature #2013: [PATCH] a = *b calls b.*@
Feature #2043: incompatible character encodings
Feature #2709: $VERBOSE, $DEBUG and Kernel#sprintf
Feature #3289: Division of negative numbers
Feature #3627: catchのブロックを再実行するメソッド
Feature #3688: redef keyword for method redefinition in Ruby 2.0
Feature #4007: numeric literal syntax sugar
Feature #4288: Allow invoking arbitrary method names with foo."something" syntax
Feature #4963: Refine and Document the Issue Tracking Process
Feature #5009: Bang method (!) consistency in Ruby 2 API
Feature #5120: String#split needs to be logical
Feature #5352: How about using <> to represent Here Document?
Feature #5400: Remove flip-flops in 2.0
Feature #5422: File.fnmatch != Dir.glob # {no,sets}
Feature #5456: kernel#syscall() should be removed.
Feature #5479: import StringIO into core, add String#to_io
Feature #5482: Rubinius as basis for Ruby 2.0
Feature #5494: Proposal: Improved Finalizer Semantics
Feature #5512: Integer#/ の改訂
Feature #5513: Numeric へ述語語の追加
Feature #5514: Numeric への quotient と quotrem の追加
Feature #5520: Numeric#exact?、Numeric#inexact? の追加
Feature #5521: Numeric#rational?、Numeric#complex?、Numeric#float? の追加
Feature #5522: Numeric#finite?、Numeric#infinite?、Numeric#nan? の追加
Feature #5523: Numeric#sign の追加
Feature #5632: Attempt to open included class shades it instead.
Feature #5653: "I strongly discourage the use of autoload in any standard libraries" (Re: autoload will be dead)
Feature #5695: CoffeeScript "is" and "isnt" keywords
Feature #5825: Sweet instance var assignment in the object initializer
Feature #6083: Hide a Bignum definition
Feature #6201: do_something then return :special_case (include "then" operator)
Feature #6219: Return value of Hash#store
Feature #6270: add "??a" support for "not defined?(a) or a.nil?"
Feature #6287: nested method should only be visible by nesting/enclosing method
Feature #6452: Allow extend to override class methods
Feature #6586: debugger belongs to core
Feature #6594: Integrated Functor
Feature #6678: Precedence of ^ operator
Feature #6688: Object#replace
Feature #6711: Optional typing and method overloading
Feature #6733: New inspect framework
Feature #6801: String#~ for a here document
Feature #6806: Support functional programming: forbid instance/class variables for ModuleName::method_name, allow for ModuleName.method_name
Feature #6810: `module A::B; end` is not equivalent to `module A; module B; end; end` with respect to constant lookup (scope)
Feature #6828: Constancy of Constants
Feature #6841: Shorthand for Assigning Return Value of Method to Self
Feature #6868: Make `do` in block syntax optional when the block is the last argument of a method and is not an optional argument
Feature #6869: Do not treat `_` parameter exceptionally
Feature #7019: allow `private` and `protected` keywords to take blocks
Feature #7220: Separate IO#dup, StringIO#initialize_copy from dup(2)
Feature #7346: object(...) as syntax sugar for object.call(...)
Feature #7359: #eql? and #equal? naming
Feature #7432: Explicit way to define local variable in scope
Feature #7487: Cutting through the issues with Refinements
Feature #7511: short-circuiting logical implication operator
Feature #7519: Module Single Inheritance
Feature #7545: Make Range act as a "lazy ordered set"
Feature #7546: Change behavior of `Array#slice` for an argument of `Range` class
Feature #7639: More freedom for location of comments
Feature #7644: In refinements, change "using" keyword to a less generic word.
Feature #7711: RubyGems uses autoload
Feature #7738: Deprecate Set#+ as an alias of Set#|, use it for symmetric difference. Introduce Hash#| for Hash#reverse_merge in Rails.
Feature #7748: Contextual send
Feature #7792: Make symbols and strings the same thing
Feature #7796: Hash#keys should return a set
Feature #7797: Hash should be renamed to StrictHash and a new Hash should be created to behave like AS HashWithIndifferentAccess
Feature #7907: Give meaning to staby word
Feature #7986: Custom case statement comparison method
Feature #8038: Keyword `object` to be used instead of `class <<`
Feature #8164: Public/Private
Feature #8229: extend Hash.include?
Feature #8270: Ruby should build without thread support (aka minix)
Feature #8377: Deprecate :: for method calls in 2.1
Feature #8807: Custom literals
Feature #9001: Please package better standard library
Feature #9076: New one-argument block syntax: &.
Feature #10042: Deprecate postfix rescue syntax for removal in 3.0
Feature #10119: [PATCH] [net/imap] Add CHANGEDSINCE FETCH modifier + complementary add MODSEQ Message Data Item in FETCH Command
Feature #10238: todo: remove dependency on malloc_usable_size
Feature #10318: [PATCH 0/n] Let underscore be positionally matched arg to omit binding obvious variable.
Feature #10406: Method starting with a capital is not detected when parentheses and receiver are omitted
Feature #10489: Add inherit method for clearer and multiple inheritance
Feature #10499: Eliminate implicit magic in Proc.new and Kernel#proc
Feature #10506: Imprve Enumerator.any? behavior
Feature #10652: Automatic detection of user and password from env