Ruby latest versions changelog

Ruby 3.3.6

• Internals Introduced Prism parser as a default gem
• Internals Lrama replaces Bison as parser generator
• Internals Major YJIT performance improvements, introduction of RJIT
• Internals Introduction of M:N thread scheduler
• Internals Several performance improvements in the Garbage Collector
• Internals Enhancements in IRB: advanced irb:rdbg integration; pager support

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Ruby 3.2.6

• Internals WASI based WebAssembly support
• Internals Production-ready YJIT
• Internals Regexp improvements against ReDoS
• Internals IRB improvements (SyntaxSuggest, ErrorHighlight)
• Internals Bundler 2.4 now uses PubGrub resolver instead of Molinillo

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Ruby 3.1.6

• Added debug gem: A new debugger
• Added error_highlight: Fine-grained error location in backtrace
• Added IRB Autocomplete and Documentation Display

• Updated Values in Hash literals and keyword arguments can be omitted.
  

  {x:, y:} is syntax sugar for {x: x, y: y} foo(x:, y:) is syntax sugar for foo(x: x, y: y).

• Updated Updates in RBS / TypeProf

• Internals YJIT: New experimental in-process JIT compiler (experimental)
  
  --yjit # CLI option

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Ruby 3.0.7

• Added Ractor - Actor-model like concurrent abstraction (experimental)
• Added Fiber Scheduler for light-weight concurrency (experimental)

• Added RBS - a language to describe the structure of Ruby classes
  

  class User attr_reader login: String attr_reader email: String def initialize: (login: String, email: String) -> void end

• Added TypeProf - type analysis tool, generates RBS type signatures (experimental)

• Added Hash#except

• Updated Keyword arguments are separated from other arguments
  

  def foo(key: 42); end; foo({key: 42}) # won't work! def foo(key: 42); end; foo(**{key: 42}) # OK

• Updated Rightward assignment statement
  

  fib(10) => a a #=> 55

• Updated Reversed (again) order of backtrace (experimental)
  

  Error message first, caller later. This reverts change from Ruby 2.5.0.

• Updated Endless method definition def square(x) = x * x

• Internals MJIT improvements

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Ruby 2.7.8

• Added Pattern Matching (experimental)
  

  case [0, [1, 2, 3]] in [a, [b, *c]] a # => 0 b # => 1 c # => [2, 3]

• Updated REPL improvements

• Updated Separation of positional and keyword arguments
  

  // To treat last hash argument as keywords, add a double splat operator // (to avoid the warning and ensure correct behavior in Ruby 3) def foo(key: 42); end; foo({key: 42}) # warned def foo(key: 42); end; foo(**{key: 42}) # OK

• Updated Argument forwarding
  

  // parentheses are mandatory def foo(...) bar(...) end

• Internals Compaction GC

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Ruby 2.6.10

• Added endless ranges (1..)
• Added Enumerable#chain
• Added function composition operators <<, >> to Proc
• Updated #then alias for #yield_self
• Internals JIT compiler --jit
• Internals Bundler is installed as a default gem

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Ruby 2.5.9

• Added yield_self
  

  // Unlike #tap, it returns the result of the block. // yield_self is like #map for single object. 'Hello'.yield_self { |word| word.upcase } => 'HELLO' ['Hello'].map { |word| word.upcase }.first => 'HELLO'

• Added rescue in blocks

• Added Hash#slice and Hash#transform_keys
• Added ERB#result_with_hash
• Updated New Array aliases - #prepend (#unshift) and #append (#push)
• Updated Pattern argument on Enumerable methods
• Updated Keyword arguments on Struct.new
• Updated Removed Top-level constant lookup
• Updated Reverse order of backtrace (oldest call first) (experimental)
  
  Only when printed to terminal directly. This will be reversed again in Ruby 3.0.0

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Ruby 2.4.10

• Added Enumerable#sum
• Added Integer#digits
• Added Regexp#match?, Regexp#named_captures
• Updated New constructor Logger.new(STDOUT, level:, progname:)
• Updated Float: #round, #ceil, #floor, and #truncate now accept a precision
• Removed Removed Fixnum and Bignum classes (unified to Integer)

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Ruby 2.3.8

• Added Safe navigation operator &.
• Added Frozen string literals
• Added Array#dig
• Added Hash#fetch_values, Hash#to_proc, Hash#dig
• Added 'Did you mean?'

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Ruby 2.2

• Removed callcc is obsolete - use Fiber instead
• Removed DL has been removed from stdlib - use Fiddle instead
• Internals Incremental GC - fixes performance for 'old' objects
• Internals The introduction of GC for symbols (mortal/immortal)

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Ruby 2.1

• Added Refinements
• Added Exception#cause - for libraries exceptions
• Added Rational and Complex literals
• Added Generational GC - young / old objects

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Ruby 2.0

• Added Keyword arguments
• Added Module#prepend
• Added Enumerator#lazy
• Added %i a literal for symbol array

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(Last updated on 2025-05-27 22:26:47 +0200)