Smalltalk-72で遊ぶOOPの原点 Advent Calendar 2023

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@sumim

Smalltalk-72のアドベントカレンダーとしては、４年ぶりの復活!?

Smalltalk-72で学ぶOOPの原点 Advent Calendar 2019

Smalltalk-72はアラン・ケイの「メッセージング」のアイデアに基づきごく初期に実装されたSmalltalkで、後にアデル・ゴールドバーグ主導で（ある意味でアラン・ケイの意に反した）商用を目指し整備されたSmalltalk-80やそれベースの今に続くSmalltalkとは、メッセージングというキーコンセプトが共通であることを除けば全く違う別の言語・処理系です。

近年、1975年ごろ保存されたバイナリー（Smalltalk-72を動作させたAltoのメモリダンプ！）をJavaScriptで書かれたAlto/Novaエミュレータに読み込ませることで、Webブラウザ上でほぼ当時のままを体験することが可能になりました。

Lively Web › ALTO-Smalltalk-72.tweak3
※オリジナルのダン・インガルス版に少し手を加えてマウスクリックやﾅﾝﾁｬｯﾃクロック取得を可能にしたコピー（Chrome系Webブラウザ推奨）

今回は1972年のローリングストーン誌に掲載された、アラン・ケイがSmalltalk-72に先立ち当時考案中だった謎言語「Smalltalk-71」で書いたSpacewar（スペースウォー・ゲーム）のコードを読み解き、Smalltalk-72へ移植、なんとかそれっぽく動作させるまでを目指します！

もちろん流れをぶったぎっての飛び入り大歓迎です！　Smalltalkやメッセージングのオブジェクト指向について遠慮なく熱く語ってください。

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Series 1

Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
26	27	28	29	30	@sumim 伝説のローリングストーン誌「スペースウォー」の記事 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	@sumim Smalltalk-71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
@sumim 宇宙船を描く（失敗編） 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	@sumim 宇宙船を描く（たぶんこうなんじゃないか編） 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	@sumim スラスターの火炎を描く（準備編） 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	@sumim スラスターの火炎を描く（再び謎解き＆少しアレンジ編） 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	@sumim 「sqrt」を実装する（準備編） 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	@sumim 「sqrt」を実装する（コードと解説編） 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	@sumim 「spaceship」を解析する 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
@sumim 「sin」「cos」の実装 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	@sumim 改めて「moveship」の実装 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	@sumim 「retro」と「display」の仮実装 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	@sumim Altoのシステムクロック取得 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	@sumim 宇宙船をキーで制御する方法を考える 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	@sumim 疑似乱数発生器を実装する 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	@sumim 宇宙船「spaceship」の仮実装と複数インスタンスの動作確認 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
@sumim 簡易スケジューラーを作る 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	@sumim 組み込みコレクションにeach変数が使える「do」を新たに追加する 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	@sumim 宇宙船の残像を消す 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	@sumim ジョイスティックの動きをキー押下で(雑に)真似る「stick」 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	@sumim スケジュールされたオブジェクトのアクティベートに「step」メッセージを使用する 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	@sumim 「find all」の実装 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	@sumim 衝突時（爆撃時）処理の実装 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
@sumim 魚雷を実装する 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	@sumim 「ask」「start」の実装 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	27	28	29	30

@sumim
伝説のローリングストーン誌「スペースウォー」の記事
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Smalltalk-71について
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宇宙船を描く（失敗編）
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宇宙船を描く（たぶんこうなんじゃないか編）
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スラスターの火炎を描く（準備編）
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スラスターの火炎を描く（再び謎解き＆少しアレンジ編）
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「sqrt」を実装する（準備編）
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「sqrt」を実装する（コードと解説編）
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「spaceship」を解析する
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「sin」「cos」の実装
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改めて「moveship」の実装
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「retro」と「display」の仮実装
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Altoのシステムクロック取得
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宇宙船をキーで制御する方法を考える
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疑似乱数発生器を実装する
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宇宙船「spaceship」の仮実装と複数インスタンスの動作確認
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簡易スケジューラーを作る
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組み込みコレクションにeach変数が使える「do」を新たに追加する
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宇宙船の残像を消す
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ジョイスティックの動きをキー押下で(雑に)真似る「stick」
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スケジュールされたオブジェクトのアクティベートに「step」メッセージを使用する
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「find all」の実装
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衝突時（爆撃時）処理の実装
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魚雷を実装する
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「ask」「start」の実装
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Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
26	27	28	29	30	@sumim 伝説のローリングストーン誌「スペースウォー」の記事 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	@sumim Smalltalk-71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
@sumim 宇宙船を描く（失敗編） 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	@sumim 宇宙船を描く（たぶんこうなんじゃないか編） 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	@sumim スラスターの火炎を描く（準備編） 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	@sumim スラスターの火炎を描く（再び謎解き＆少しアレンジ編） 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	@sumim 「sqrt」を実装する（準備編） 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	@sumim 「sqrt」を実装する（コードと解説編） 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	@sumim 「spaceship」を解析する 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
@sumim 「sin」「cos」の実装 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	@sumim 改めて「moveship」の実装 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	@sumim 「retro」と「display」の仮実装 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	@sumim Altoのシステムクロック取得 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	@sumim 宇宙船をキーで制御する方法を考える 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	@sumim 疑似乱数発生器を実装する 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	@sumim 宇宙船「spaceship」の仮実装と複数インスタンスの動作確認 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
@sumim 簡易スケジューラーを作る 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	@sumim 組み込みコレクションにeach変数が使える「do」を新たに追加する 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	@sumim 宇宙船の残像を消す 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	@sumim ジョイスティックの動きをキー押下で(雑に)真似る「stick」 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	@sumim スケジュールされたオブジェクトのアクティベートに「step」メッセージを使用する 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	@sumim 「find all」の実装 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	@sumim 衝突時（爆撃時）処理の実装 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
@sumim 魚雷を実装する 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	@sumim 「ask」「start」の実装 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	27	28	29	30

@sumim
伝説のローリングストーン誌「スペースウォー」の記事
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Smalltalk-71について
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宇宙船を描く（失敗編）
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宇宙船を描く（たぶんこうなんじゃないか編）
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@sumim
スラスターの火炎を描く（準備編）
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@sumim
スラスターの火炎を描く（再び謎解き＆少しアレンジ編）
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「sqrt」を実装する（準備編）
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「sqrt」を実装する（コードと解説編）
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「spaceship」を解析する
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「sin」「cos」の実装
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改めて「moveship」の実装
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「retro」と「display」の仮実装
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Altoのシステムクロック取得
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宇宙船をキーで制御する方法を考える
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疑似乱数発生器を実装する
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宇宙船「spaceship」の仮実装と複数インスタンスの動作確認
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簡易スケジューラーを作る
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組み込みコレクションにeach変数が使える「do」を新たに追加する
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宇宙船の残像を消す
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ジョイスティックの動きをキー押下で(雑に)真似る「stick」
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スケジュールされたオブジェクトのアクティベートに「step」メッセージを使用する
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「find all」の実装
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衝突時（爆撃時）処理の実装
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魚雷を実装する
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「ask」「start」の実装
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You can increase the number of series when Calendar 1 is filled with more than 10 articles.

Smalltalk-72で遊ぶOOPの原点 Advent Calendar 2023

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Series 1

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