# -*- 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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Method reference operator,
.:is introduced as an experimental feature. [Feature #12125] [Feature #13581] -
Proc.new and proc with no block in a method called with a block is warned now.
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lambda with no block in a method called with a block errs.
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Non-Symbol keys in a keyword arguments hash was prohibited at 2.6.0, but now allowed again. [Bug #15658]
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Numbered parameter as the default block parameter is introduced as an experimental feature. [Feature #4475]
- Enumerable
- New method
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Added Enumerable#tally. [Feature #11076]
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- Enumerator
- New method
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Added Enumerator::Yielder#to_proc so that a Yielder object can be directly passed to another method as a block argument. [Feature #15618]
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- Regexp/String
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Update Unicode version and Emoji version from 11.0.0 to 12.0.0. [Feature #15321]
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- CSV
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Upgrade to 3.0.4. See github.com/ruby/csv/blob/master/NEWS.md.
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- RSS
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Upgrade to RSS 0.2.8. See github.com/ruby/rss/blob/master/NEWS.md.
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- profile.rb, Profiler__
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Removed from standard library. No one maintains it from Ruby 2.0.0.
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- JIT
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Default value of –jit-max-cache is changed from 1,000 to 100
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Default value of –jit-min-calls is changed from 5 to 10,000
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Require compilers to support C99 [Misc #15347]
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Details of our dialect: bugs.ruby-lang.org/projects/ruby-trunk/wiki/C99
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