Java 2 – 1998
- The Collections Framework: 4/10
Java 1.4 – 2002
- The assert keyword: 3/10
- Regular expressions: 9/10
- “New” I/O (NIO): 0/10
- Also notable in this release was the new crypto APIs: 1/10
Java 5 – 2004
- Generics: 8/10.
- Annotations: 5/10
- Autoboxing: 7/10
- Enums: 6/10
- Vararg methods: 8/10
- The for-each loop: 8/10
- Static imports: 8/10
- Doug Lea’s java.util.concurrent etc: 10/10
Java 6
- After the big bang of Java 5, Java 6 was mostly performance and VM improvements, I believe, so we had to wait until 2011 for more new language features.
Java 7 – 2011
- Strings in switch: 1/10
- Try-with-resources: 10/10
- Diamond operator for type parameter inference: 6/10
- Binary literals and underscores in literals: 4/10
- Path and Filesystem APIs: 3/10
Java 8 – 2014
- Lambdas: 4/10
- Streams: 1/10
- Java Time: 8/10
Java 9 – 2017
- Modules: -10/10 (that’s minus 10!)
- jshell: 6/10
Java 10 – 2018
- Local type inference (“var”): 9/10
Java 11 – 2018
- New HTTP Client: 6/10
- This release also added TLS 1.3 support, along with djb-suite crypto algorithms. Yay. 9/10
Java 12 – 2019
- Switch expressions: 6/10
Java 13 – 2019
- Text blocks: 3/10
Java 14 – 2020
- Pattern matching in instanceof: 4/10
- Records: 10/10
- Better error messages for NullPointerExceptions: 8/10
Java 15 – 2020
- Sealed classes: 8/10
- EdDSA signatures: 8/10
Java 16 – 2021
- Vector (SIMD) API: ?/10
Java 17 – 2021
- Pattern matching switch: 7/10
Java 18 – 2022
- UTF-8 by default: 10/10
Java 19 – 2022
- Record patterns: 9/10
- Virtual threads: ?/10
Java 21 – 2023
- String templates: 10/10 (if they ever arrive).
- Sequenced collections: 6/10
- Wildcards in patterns: 6/10
- Simplified console applications: 8/10
- This release also adds support for KEMs, although in the simplest possible form only. Meh. 4/10
Java 22 – 2024
- The only significant change in this release is the ability to have statements before a call to super() in a constructor. Fine. 5/10
Java 23 – 2024
- Primitive types in patterns: 7/10
- Markdown javadoc comments: 1/10
Java 24 – 2024
Java 25 – 2025
- Stable values: 7/10?
- PEM encoding of cryptographic objects: 7/10

まあおおむね同意?

miniml perfect hash

WG 14

WG 14 Document log

構造体/共用体の先頭メンバー

N3728 2025/10/26 Karl, Designate the address of a struct/union’s first member as the address of the struct/union

Changes: Introduce a normative guarantee that, within any structure object, the address of the structure and the address of its first member are equal.

Analysis:

The C standard guarantees pointer representation uniformity in section 6.2.5 and discusses pointers in 6.3.2.3 but does not explicitly state that a pointer to a struct and a pointer to its first member must compare equal. This omission creates ambiguity: most implementations assume zero offset for the first member, but the text does not require it. Formalizing this rule removes any doubt and codifies an expected practice

これって今まで明確に決まってなかったのかと思ったけど、最適化の関係でメンバー(フィールド)の入れ替えを許す/許さないとかにも関わってくるのか。

あと、C++でvtableが構造体(クラス)の先頭に置くのをマイクロソフトかボーランドが特許にしてたような(かなりあやふやな記憶)

YOLO

But pervasive security vulnerabilities mean that the traditional “YOLO” approach to C compilation is a bad idea for software that has to handle untrusted input, such as Web browsing or email.

YOLOってなんじゃろ?

留学用語集【YOLOって何の略？】 | 留学くらべーる

「You only live once」の略で、「人生は一度きり」という意味です。SNSでも見かけることの多いスラングです。

【物体検出手法の歴史 : YOLOの紹介】 #DeepLearning - Qiita

YOLOというのはもともと"You only live once”「人生一度きり」の頭文字をとったスラングで，これをYOLOの著者であるJoseph Redmon氏は"You Only Look Once"「見るのは一度きり」という風に文字ってモデルを名付けました．

新刊近刊

関ヶ原

コミック乱で連載の「大乱関ヶ原」が今月発売号で完結したのだけど (あとすこし続くものかと思ってた) 関ヶ原と言えばこんな本が出るらしい。

シン・関ヶ原 (講談社現代新書 2791) | 高橋陽介

出版社: 講談社 (2025/10/23)

星野之宣50周年珠玉SF選集

Amazon.co.jp: 星野之宣50周年珠玉SF選集　刹那 : 星野之宣: 本

数学者に「終活」という解はない

「NHKの数学講座」で奇抜な数学者が披露した「伝説の講義」…視聴率が取れない教育番組で「驚異的な視聴率」を叩き出せたワケ（秋山仁） | ＋αオンライン | 講談社

本屋で見かけてパラパラと眺めてみたら面白そうだったので忘れなければ買うつもり(そのときは買っていく余裕なかったのよ)

数学者に「終活」という解はない (講談社+α新書 895-1C) : 秋山仁: 本

awk

gawk

Remove never-documented support for tawk extension delete(a). - gawk.git - gawk

これ(delete(配列変数)で配列をクリア)ってドキュメントに記載なかった?

diff --git a/ChangeLog b/ChangeLog
index 813248c9..c2064ccb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2025-10-28         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* awkgram.y: Remove never-documented support for tawk extension
+	`delete(a)' and lint warnings for regexp modifiers. Tawk is dead,
+	it's time to bury the corpse.
+

このスレッド one other possible –lint issue でのやりとりが発端ぽいけど、中身をきちんと追いかけてないのでよくわからん

あー、引数を囲むカッコのあるなしで違う? たしかにカッコつきの方はドキュメントにはない

The GNU Awk User’s Guide

All the elements of an array may be deleted with a single statement by leaving off the subscript in the delete statement, as follows:
delete array
Using this version of the delete statement is about three times more efficient than the equivalent loop that deletes each element one at a time.

This form of the delete statement is also supported by BWK awk and mawk, as well as by a number of other implementations.

awkgram.y - gawk.git - gawk


	| LEX_DELETE NAME { sub_counter = 0; } delete_subscript_list
	  {
		char *arr = $2->lextok;

		$2->opcode = Op_push_array;
		$2->memory = variable($2->source_line, arr, Node_var_new);

		if (! do_posix && ! do_traditional) {
			if ($2->memory == symbol_table)
				fatal(_("`delete' is not allowed with SYMTAB"));
			else if ($2->memory == func_table)
				fatal(_("`delete' is not allowed with FUNCTAB"));
		}

		if ($4 == NULL) {
			/*
			 * As of September 2012, POSIX has added support
			 * for `delete array'. See:
			 * http://austingroupbugs.net/view.php?id=544
			 *
			 * Thanks to Nathan Weeks for the initiative.
			 *
			 * Thus we no longer warn or check do_posix.
			 * Also, since BWK awk supports it, we don't have to
			 * check do_traditional either.
			 */
			$1->expr_count = 0;
			$$ = list_append(list_create($2), $1);
		} else {
			$1->expr_count = sub_counter;
			$$ = list_append(list_append($4, $2), $1);
		}
	  }
	| LEX_DELETE '(' NAME ')'
		  /*
		   * this is for tawk compatibility. maybe the warnings
		   * should always be done.
		   */
	  {
		static bool warned = false;
		char *arr = $3->lextok;

		if (do_lint && ! warned) {
			warned = true;
			lintwarn_ln($1->source_line,
				_("`delete(array)' is a non-portable tawk extension"));
		}
		if (do_traditional) {
			error_ln($1->source_line,
				_("`delete(array)' is a non-portable tawk extension"));
		}
		$3->memory = variable($3->source_line, arr, Node_var_new);
		$3->opcode = Op_push_array;
		$1->expr_count = 0;
		$$ = list_append(list_create($3), $1);

		if (! do_posix && ! do_traditional) {
			if ($3->memory == symbol_table)
				fatal(_("`delete' is not allowed with SYMTAB"));
			else if ($3->memory == func_table)
				fatal(_("`delete' is not allowed with FUNCTAB"));
		}
	  }

なるほど。カッコなしの書き方はPOSIXにもあるけど、カッコつきの方はそうではない(tawk固有の拡張)ということなのね。

しかし懐かしい名前だ＞tawk

2’s complement

これ、手法を丸暗記していて（私の場合は全ビット反転させて1を足す）、その理由をあまり考えたことがなかったですが、全ビット反転=円環を逆周り、1を足す=位置の微調整、という感じなんですかね？ https://t.co/1bebhy5pG1
— はけた＠Excelスピルデータ整形テクニック (@excelspeedup) October 26, 2025

たしかビット反転は1の補数をとるのと同じことで、かつ2の補数は1の補数に1を加えたものと同じなので、

ビット反転 → 1加える

という手順で2の補数が求められる。ということだったかと

メガドラ

1988年10月29日に発売されました。

*¨.:｡+ﾟ*•.¸ 本日は #メガドライブの誕生日 *ﾟ+｡:.ﾟ•.¸¸

Happy birthday, "#MEGADRIVE" 37 years ago today, the MEGADRIVE launched🎂 pic.twitter.com/D5Lk5Khdd3
— セガ公式アカウント🦔 (@SEGA_OFFICIAL) October 28, 2025

into Darkness ≪ prev