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NEWS for Ruby 3.0.0 (277.0)

• 3.0
• 3.1
• 3.2
• 3.3

• 文書

NEWS for Ruby 3.0.0 このドキュメントは前回リリース以降のバグ修正を除くユーザーに影響のある機能の変更のリストです。

...リンク先を参照してください。

== 言語仕様の変更

* Keyword arguments are now separated from positional arguments.
Code that resulted in deprecation warnings in Ruby 2.7 will now
result in ArgumentError or different behavior. 14183
* Procs accepting a single rest argu...

...redesigned. [EXPERIMENTAL]
* `=>` is added. It can be used like a rightward assignment.
17260
* `in` is changed to return `true` or `false`. 17371

//emlist{
0 => a
p a #=> 0

{b: 0, c: 1} => {b:}
p b #=> 0
//}

//emlist{
# version 3.0
0 in 1 #=> false

# version 2.7
0 in 1...

...", "f", 3]
in [*pre, String => x, String => y, *post]
p pre #=> ["a", 1]
p x #=> "b"
p y #=> "c"
p post #=> [2, "d", "e", "f", 3]
end
//}

* Endless method definition is added. [EXPERIMENTAL]
16746

//emlist{
def square(x) = x * x
//}

* Interpolated String literals are no lo...