# -*- rdoc -*-
This document is a list of user visible feature changes made between releases except for bug fixes.
Note that each entry is kept so brief that no reason behind or reference information is supplied with. For a full list of changes with all sufficient information, see the ChangeLog file or Redmine (e.g. https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER)
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Top-level constant look-up is removed. [Feature #11547]
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rescue/else/ensure are allowed inside do/end blocks. [Feature #12906]
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refinements take place in string interpolations. [Feature #13812]
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Array
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Array#append [Feature #12746]
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Array#prepend [Feature #12746]
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Dir
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Dir.glob provides new optional keyword argument, :base.
- Feature #13056
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Dir.children [Feature #11302]
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Dir.each_child [Feature #11302]
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File
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:newline option to File.open implies text mode now. [Bug #13350]
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File#path now raises an IOError for files opened with File::Constants::TMPFILE option. [Feature #13568]
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File.stat, File.exist?, and other rb_stat()-using methods release GVL
- Bug #13941
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File.rename releases GVL [Feature #13951]
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Hash
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Hash#transform_keys [Feature #13583]
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Hash#transform_keys! [Feature #13583]
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IO
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IO#pread [Feature #4532]
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IO#pwrite [Feature #4532]
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IOError
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exception message “stream closed” is changed [Bug #13405]
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Integer
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Integer.sqrt [Feature #13219]
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Integer#step does no longer rescue exceptions when given a step value which cannot be compared with #> to 0. [Feature #7688]
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Integer#{round,floor,ceil,truncate} now always return an Integer.
- Bug #13420
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Kernel
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Kernel#yield_self [Feature #6721]
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Net::HTTP
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Net::HTTP.new supports no_proxy parameter [Feature #11195]
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Numeric
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Numerical comparison operators (<,<=,>=,>) no longer rescue exceptions of #coerce. Return nil in #coerce if the coercion is impossible.
- Feature #7688
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Process
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Precision of Process.times is improved if getrusage(2) exists. [Feature #11952]
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Range
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Range#initialize no longer rescue exceptions when comparing begin and end with #<=> and raise a “bad value for range” ArgumentError but instead let the exception from the #<=> call go through.
- Feature #7688
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Regexp
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Update to Onigmo 6.1.1.
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Support absent operator github.com/k-takata/Onigmo/issues/82
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String
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String#-@ deduplicates unfrozen strings. Already-frozen strings remain unchanged for compatibility. [Feature #13077]
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-“literal” (String#-@) optimized to return the same object (same as “literal”.freeze in Ruby 2.1+) [Feature #13295]
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String#{casecmp,casecmp?} now return nil for non-string arguments instead of raising a TypeError. [Bug #13312]
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String#delete_prefix is added to remove prefix [Feature #12694]
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String#delete_prefix! is added to remove prefix destructively [Feature #12694]
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String#delete_suffix is added to remove suffix [Feature #13665]
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String#delete_suffix! is added to remove suffix destructively [Feature #13665]
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String#each_grapheme_cluster and String#grapheme_clusters is added to enumerate grapheme clusters [Feature #13780]
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Regexp/String: Updated Unicode version from 9.0.0 to 10.0.0 [Feature #13685]
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Thread
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Thread#fetch [Feature #13009]
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Description set by Thread#name= is now visible on Windows 10.
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Time
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Time#at receives 3rd argument which specifies the unit of 2nd argument.
- Feature #13919
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KeyError
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KeyError#receiver [Feature #12063]
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KeyError#key [Feature #12063]
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Bundler
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Add Bundler to Standard Library. [Feature #12733]
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ERB
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Add ERB#result_with_hash to render a template with local variables passed with a Hash object. [Feature #8631]
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Carriage returns are changed to be trimmed properly if trim_mode is specified and used. Duplicated newlines will be removed on Windows. [Bug #5339] [Bug #11464]
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Net::HTTP
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Add more HTTP status classes
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Net::HTTP::STATUS_CODES is added as HTTP Status Code Repository [Misc #12935]
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Net::HTTP#proxy_user and Net::HTTP#proxy_pass now reflects http_proxy environment variable if the system’s environment variable is multiuser safe. [Bug #12921]
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RbConfig
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New constants:
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RbConfig::LIMITS is added to provide the limits of C types.
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Ripper
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New method:
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Ripper#state is added to tell the state of scanner. [Feature #13686]
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New constants:
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Ripper::EXPR_BEG and so on for Ripper#state.
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RDoc
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Update RDoc 6.0.0.beta3.
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Replaced IRB based lexer with Ripper. It much improves the speed of generating document.
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Rubygems
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Set
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Add Set#to_s as alias to #inspect [Feature #13676]
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Add Set#=== as alias to #include? [Feature #13801]
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WEBrick
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Add Server Name Indication (SNI) support [Feature #13729]
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BasicSocket#read_nonblock and BasicSocket#write_nonblock no longer sets the O_NONBLOCK file description flag as side effect (on Linux only) [Feature #13362]
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Net::HTTP
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Net::HTTP#start now pass :ENV to p_addr by default. [Bug #13351] To avoid this, pass nil explicitly.
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Random.raw_seed renamed to become Random.urandom. It is now applicable to non-seeding purposes due to [Bug #9569].
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Socket::Ifaddr#vhid is added [Feature #13803]
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ConditionVariable, Queue and SizedQueue reimplemented for speed. They no longer subclass Struct. [Feature #13552]
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mathn.rb Removed from stdlib. [Feature #10169]
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Rubygems
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Removed “ubygems.rb” file from stdlib. It’s needless after the Ruby 1.9.
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(This might not be a “user visible feature change” but) Hash class’s hash function is now SipHash13. [Feature #13017]
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SecureRandom now prefers OS-provided sources than OpenSSL. [Bug #9569]
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Mutex rewritten to be smaller and faster [Feature #13517]
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Print backtrace and error message in reverse order if STDERR is unchanged and a tty.
- Feature #8661
- experimental
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configure option –with-ext now mandates its arguments. So for instance if you run ./configure –with-ext=openssl,+ then the openssl library is guaranteed compiled, otherwise the build fails abnormally.
Note however to always add the “,+” at the end of the argument. Otherwise nothing but openssl are built. [Feature #13302]