Advent Calendar 2020 / Programming language

Ruby 3.0 Advent Calendar 2020

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Category：Programming language

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@pink_bangbi

Ruby 3.0 の Advent Calendar です。
Ruby 3.0 関連であれば機能解説でも応用的な使い方でも裏話でも何でも構いません。
みんなで12月25日にリリースされる Ruby 3.0 に備えましょう。
Ruby 自体の Advent Calendar はこちら：Ruby Advent Calendar 2020
去年の Advent Calendar はこちら：Ruby 2.7 Advent Calendar 2019

Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
29	30	@pink_bangbi Ruby に右代入がやってくる Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0に投げたPull Request Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0でRubyで実装されたメソッドたち Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0で非推奨から廃止になるメソッドたち Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@ima1zumi Rubyにはオブジェクトを汚染する仕組みがあった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@pink_bangbi 今年 Ruby に投げたパッチまとめ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@jnchito Rubyで型チェック！動かして理解するRBS入門〜サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 1〜 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi OpenStruct で既存のメソッドを呼び出せるようになった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0.0-preview2 がリリースされた Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Arguments forwardingがちょっと便利になった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Win32APIが廃止された Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi 銀座Rails#26で Ruby 3.0 の話をした Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@pink_bangbi Ruby 3.0 で追加・変更される Hash のメソッド Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@TomeHirata Ruby3.0で導入される型定義！TypeprofでBlockやProcを解析してみる Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ ArrayやStringのメソッドの返り値が変更された話 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ C APIヘッダーが分割された話 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pocke RBSに取り込まれた自分のパッチについて Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pocke RBS生成について Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi 銀座Rails#28 で Ruby 3.0 の話をした Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@ybiquitous Steepによる型チェックの実践例 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@jnchito サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 2 - 新機能と変更点の総まとめ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0 で WEBrick と SDBM が標準ライブラリから削除される Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Dataクラスが廃止された Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ractor の共有可能オブジェクトについて Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0 がリリースされました！！！ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	26

@pink_bangbi
Ruby に右代入がやってくる
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@S_H_
Ruby3.0に投げたPull Request
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Ruby3.0でRubyで実装されたメソッドたち
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@S_H_
Ruby3.0で非推奨から廃止になるメソッドたち
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@ima1zumi
Rubyにはオブジェクトを汚染する仕組みがあった
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@pink_bangbi
今年 Ruby に投げたパッチまとめ
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@jnchito
Rubyで型チェック！動かして理解するRBS入門〜サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 1〜
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@pink_bangbi
OpenStruct で既存のメソッドを呼び出せるようになった
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@pink_bangbi
Ruby 3.0.0-preview2 がリリースされた
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@S_H_
Arguments forwardingがちょっと便利になった
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@S_H_
Win32APIが廃止された
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@pink_bangbi
銀座Rails#26で Ruby 3.0 の話をした
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@pink_bangbi
Ruby 3.0 で追加・変更される Hash のメソッド
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@TomeHirata
Ruby3.0で導入される型定義！TypeprofでBlockやProcを解析してみる
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@S_H_
ArrayやStringのメソッドの返り値が変更された話
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@S_H_
C APIヘッダーが分割された話
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@pocke
RBSに取り込まれた自分のパッチについて
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@pocke
RBS生成について
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@pink_bangbi
銀座Rails#28 で Ruby 3.0 の話をした
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@ybiquitous
Steepによる型チェックの実践例
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@jnchito
サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 2 - 新機能と変更点の総まとめ
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@pink_bangbi
Ruby 3.0 で WEBrick と SDBM が標準ライブラリから削除される
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@S_H_
Dataクラスが廃止された
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@pink_bangbi
Ractor の共有可能オブジェクトについて
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@pink_bangbi
Ruby 3.0 がリリースされました！！！
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Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
29	30	@pink_bangbi Ruby に右代入がやってくる Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0に投げたPull Request Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0でRubyで実装されたメソッドたち Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Ruby3.0で非推奨から廃止になるメソッドたち Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@ima1zumi Rubyにはオブジェクトを汚染する仕組みがあった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@pink_bangbi 今年 Ruby に投げたパッチまとめ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@jnchito Rubyで型チェック！動かして理解するRBS入門〜サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 1〜 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi OpenStruct で既存のメソッドを呼び出せるようになった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0.0-preview2 がリリースされた Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Arguments forwardingがちょっと便利になった Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Win32APIが廃止された Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi 銀座Rails#26で Ruby 3.0 の話をした Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@pink_bangbi Ruby 3.0 で追加・変更される Hash のメソッド Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@TomeHirata Ruby3.0で導入される型定義！TypeprofでBlockやProcを解析してみる Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ ArrayやStringのメソッドの返り値が変更された話 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ C APIヘッダーが分割された話 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pocke RBSに取り込まれた自分のパッチについて Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pocke RBS生成について Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi 銀座Rails#28 で Ruby 3.0 の話をした Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use
@ybiquitous Steepによる型チェックの実践例 Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@jnchito サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 2 - 新機能と変更点の総まとめ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0 で WEBrick と SDBM が標準ライブラリから削除される Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@S_H_ Dataクラスが廃止された Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ractor の共有可能オブジェクトについて Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	@pink_bangbi Ruby 3.0 がリリースされました！！！ Overwrite Title URL You can post either your article on Qiita or your blog post. About reserved posting If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day. About posting period Only articles submitted after November 1 of the year can be registered. (Secret articles can be registered anytime articles are posted.) When you participate, we will assume that you have agreed to the terms of use	26

@pink_bangbi
Ruby に右代入がやってくる
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@S_H_
Ruby3.0に投げたPull Request
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Ruby3.0でRubyで実装されたメソッドたち
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Ruby3.0で非推奨から廃止になるメソッドたち
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@ima1zumi
Rubyにはオブジェクトを汚染する仕組みがあった
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@pink_bangbi
今年 Ruby に投げたパッチまとめ
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@jnchito
Rubyで型チェック！動かして理解するRBS入門〜サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 1〜
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@pink_bangbi
OpenStruct で既存のメソッドを呼び出せるようになった
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@pink_bangbi
Ruby 3.0.0-preview2 がリリースされた
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@S_H_
Arguments forwardingがちょっと便利になった
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@S_H_
Win32APIが廃止された
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@pink_bangbi
銀座Rails#26で Ruby 3.0 の話をした
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@pink_bangbi
Ruby 3.0 で追加・変更される Hash のメソッド
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@TomeHirata
Ruby3.0で導入される型定義！TypeprofでBlockやProcを解析してみる
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@S_H_
ArrayやStringのメソッドの返り値が変更された話
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@S_H_
C APIヘッダーが分割された話
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@pocke
RBSに取り込まれた自分のパッチについて
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@pocke
RBS生成について
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@pink_bangbi
銀座Rails#28 で Ruby 3.0 の話をした
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@ybiquitous
Steepによる型チェックの実践例
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@jnchito
サンプルコードでわかる！Ruby 3.0の主な新機能と変更点 Part 2 - 新機能と変更点の総まとめ
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@pink_bangbi
Ruby 3.0 で WEBrick と SDBM が標準ライブラリから削除される
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@S_H_
Dataクラスが廃止された
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@pink_bangbi
Ractor の共有可能オブジェクトについて
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@pink_bangbi
Ruby 3.0 がリリースされました！！！
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