Python dictionary implementation – Laurent Luce's Blog
This post describes how dictionaries are implemented in the Python language. Dictionaries are indexed by keys and they can be seen as associative arrays. Let’s add 3 key/value pairs to a dictionary: >>> d = {'a': 1, 'b': 2} >>> d['c'] = 3 >>> d {'a': 1, 'b': 2, 'c': 3} The values can be accessed this way: >>> d['a'] 1 >>> d['b'] 2 >>> d['c'] 3 >>> d['d'] Traceback (most recent call last): File "<s
Apache Developers' C Language Style Guide - The Apache HTTP Server Project
Apache Developers' C Language Style Guide¶ Compiled by Paul Sutton [email protected]. Based on a vote taken in November, 1996. Further refinements voted upon in July 1997. Introduction¶ [This bit could state that code should be laid out to be clear to someone else familiar with Apache. Functions should be short and easily understood. Comments should be provided to explain the rationale for code which i
Clearsilver
What is Clearsilver? Clearsilver is a fast, powerful, and language-neutral HTML template system. In both static content sites and dynamic HTML applications, it provides a separation between presentation code and application logic which makes working with your project easier. The design of Clearsilver began in 1999, and evolved during its use at onelist.com, egroups.com, and Yahoo! Groups. Today ma
ccan
ccan Comprehensive C Archieve Network The Idea That nice snippets of C code should be moved out of junkcode directories and exposed to a wider world, where they can become something useful. CCAN is loosely modelled after the succesful CPAN project for Perl code development and sharing. Getting The Code Once you grab some modules, there are two basic ways to use it: Just hack it to compile in your
JTN002 — Jera Design LLC
JTN002 - MinUnit -- a minimal unit testing framework for CIntroductionUnit testing frameworks are quite popular in the object-oriented programming world. Frameworks like JUnit (for Java), SUnit (for Smalltalk), and CppUnit (for C++) provide a rich set of functionality. However, this rich set of functionality can be intimidating to someone who wants to do unit testing in a more constrained environm
ã™ã”ã„乱数生æˆã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ 「xorshift〠- Pashango’s Blog
ã¿ãªã•ã‚“ã€ã“ã‚“ã«ã¡ã¯ã€ä»Šå›žã¯ä¹±æ•°ã®è©±ã§ã™ã€‚ 特ã«è¤‡æ•°æ©Ÿç¨®ã§ã®ã‚³ãƒ³ã‚·ãƒ¥ãƒ¼ãƒžæ©Ÿã§ã‚²ãƒ¼ãƒ を開発をã—ã¦ã„ã‚‹ã¨ã€æ©Ÿç¨®é–“ã§ä¹±æ•°å€¤ã‚’統一ã™ã‚‹ãŸã‚ã«ä¹±æ•°ç”Ÿæˆã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ を自作ã—ã¾ã™ã‚ˆã。 ãã“ã§ã‚ˆã使ã‚れるアルゴリズムãŒã€Œç·šå½¢åˆåŒæ³•ã€ã§ã™ã€å†…容ã¯è‡³ã£ã¦ç°¡å˜ã§ã€ä»¥ä¸‹ã®æ¼¸åŒ–å¼ã‚’使ã„ã¾ã™ã€‚ A,B,Mã¯å®šæ•°ã§ã€ã©ã®å€¤ãŒå…¥ã‚‹ã‹ã¯å‡¦ç†ç³»ä¾å˜ã§ã™ã€‚ 例ãˆã°Unixãªã©ã®å‡¦ç†ç³»ã§ã¯A=1103515245,B=12345,M=2147483647ãªã©ãŒå…¥ã‚Šã¾ã™ã€‚ C言語ã§ã™ã¨ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã‚Šã¾ã™ã€‚ static unsigned int x=1; void srand(unsigned int s) { x=s; } unsigned int rand() { x=x*1103515245UL+12345UL; return x&2147483647UL; } ã“ã®ã€Œç·šå½¢åˆåŒæ³•ã€ã¯è¨ˆç®—ãŒç°¡å˜ã§é«˜é€Ÿã§ã™ã‹ã‚‰ã€ã„ã‚ã„ã‚ãªç’°
ã€Œæ§‹é€ åŒ–ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«é–¢ã™ã‚‹è¦šãˆæ›¸ãã€ã¸ã¨å°Žã„ãŸã‚‚ã® | taro-nishinoã®æ—¥è¨˜ | スラド
明ã‘ã¾ã—ã¦ãŠã‚ã§ã¨ã†ã”ã–ã„ã¾ã™ã€‚ ã•ã¦ã€ç§ã®å‘¨è¾ºã§ã¯ã€å…ˆæ—¥ã«æ›¸ã„ãŸ"Gotoã¯æœ‰ç”¨ã§ã‚ã‚‹"ã«ã¤ã„ã¦ã€æŠ˜è§’ã®Matt S. Troutæ°ã®æœ¬æ–‡ã‚ˆã‚Šã‚‚ã€ä½•æ•…ã‹ä¸å¹¸ã«ã‚‚ç§ã®æ›¸ã„ãŸè¨³æ³¨ã®æ–¹ãŒè©±é¡Œã«ãªã£ã¦ã„ã¾ã™ã€‚ Linusæ°ã¯goto有用論ã®ä»–ã«ã‚‚ã€C++をボãƒã‚¯ã‚½ã«è²¶ã—ãŸã‚Šã€æœ¬å½“ã«æ„‰å¿«ãªäººã ã¨ç§ã¯æ€ã„ã¾ã™ã€‚ãŸã ã€C++を貶ã•ã‚ŒãŸæ™‚ã®åå¿œã¨ã—ã¦ã€æµ·å¤–ã¯ç½®ã„ã¨ãã¨ã—ã¦ã€æ—¥æœ¬ã®ä¸€éƒ¨ã®äººãŒä½™ã‚Šã«ã‚‚井ã®ä¸ã®è›™çš„ãªå応をã—ãŸã‚ˆã†ã«è¨˜æ†¶ã—ã¦ã„ã¾ã™ã€‚代表的ãªä¾‹ã¯ã€ŒLinusã¯ã‚ªãƒ–ジェクト指å‘ãŒåˆ†ã‹ã‚‰ãªã„ã‹ã‚‰ã ã€ã¨ã„ã†ã®ãŒã‚ã‚Šã¾ã™ã€‚ç§ã¯æ€ã‚ãšç¬‘ã„ã¾ã—ãŸã€‚Linusæ°ã»ã©ã®é 脳ã§åˆ†ã‹ã‚‰ãªã„ã“ã¨ãŒã€æ¥µæ±ã®æ—¥æœ¬ã®è²´æ–¹ãŒãŸã¯åˆ†ã‹ã£ã¦ã„ã‚‹ã¨è¨€ã‚ã‚“ã°ã‹ã‚Šã˜ã‚ƒãªã„ã§ã™ã‹ã€‚一部ã«ã›ã‚ˆã€ã ã‹ã‚‰æ—¥æœ¬ã¯é§„ç›®ã ã¨æ€ã„ã¾ã—ãŸã€‚ã¤ã¾ã‚Šã€è‡ªå·±ã‚’客観視ã›ãšã€å®Ÿè³ªçš„実力ã¯ç„¡ã„ã®ã«ä¸€æµå®¶æ°—å–ã‚Šãªã‚“ã§ã™ã。もã£ã¨ã¯ã£ãり言ãˆã°ä½•æ§˜ã®ã¤ã‚‚ã‚Šãªã‚“ã ã¨ã€‚ã©
Gotoã¯æœ‰ç”¨ã§ã‚ã‚‹ | taro-nishinoã®æ—¥è¨˜ | スラド
ã‚ã®Matt S. Troutæ°ã®æ›¸ãエッセイãŒã“ã®ã¨ã“ã‚å…¨ãç¦æ¢èªžä¸€ã¤ç„¡ãã€æ„›èªè€…ã§ã‚ã‚‹ç§ã‹ã‚‰è¦‹ã‚Œã°å¬‰ã—ã„やらã€è‹¥å¹²ã®å¯‚ã—ã•ã‚‚（本当ã«å‹æ‰‹ã ãªã）感ã˜ã¾ã™ã€‚多分ã€ã‚¯ãƒªã‚¹ãƒžã‚¹ã‚·ãƒ¼ã‚ºãƒ³ã ã£ãŸã‹ã‚‰ã€è‡ªç²›ã•ã‚Œã¦ã„ãŸã®ã§ã¯ãªã‹ã‚ã†ã‹ã¨æŽ¨å¯Ÿã—ã¾ã™ã€‚ ã¨ã“ã‚ã§ã€å¹´å£ã®å…¥ã£ãŸPerlerã§ã‚‚æ„外ã«çŸ¥ã‚‰ãªã„ã‚‚ã®ã«ã€goto &subãŒã‚ã‚Šã¾ã™ã€‚ã“ã‚Œã¯AUTOLOADã§ä½¿ã‚れるã—ã€ç¢ºã‹å¼¾ã•ã‚“も自身ã®ãƒ–ãƒã‚°ã§è§£èª¬ã•ã‚Œã¦ã„ãŸã‚ˆã†ã«ã‚‚記憶ã—ã¦ã„ã¾ã™ãŒã€çŸ¥ã£ã¦ã„ã¦æã¯ã”ã–ã„ã¾ã›ã‚“。ã¨è¨€ã†ã‹ã€Perlerã¨è‡ªç§°ã™ã‚‹ãªã‚‰ã°ã€ãã‚Œãらã„知ã£ã¨ã‘ã¨è¨€ã„ãŸã„ãらã„ã§ã™ã€‚ Mattæ°ã®æœ€è¿‘ã®ã‚¨ãƒƒã‚»ã‚¤ã¯ãã®gotoを親切ã«ã‚‚â€Goto considered usefulâ€ã§è§£èª¬ã—ã¦ãŠã‚Šã¾ã™ã€‚ãã®ç§è¨³ã‚’以下ã«è¼‰ã›ã¦ãŠãã¾ã™ã€‚ Gotoã¯æœ‰ç”¨ã§ã‚ã‚‹ 2009å¹´12月26æ—¥ Matt S. Trout é•ã†ã‚ˆã€ãã®gotoã§ãªãã¦ã€åˆ¥
JPCERT コーディãƒãƒ¼ã‚·ãƒ§ãƒ³ã‚»ãƒ³ã‚¿ãƒ¼ ã‚»ã‚ュアコーディング
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2008年下期ã«ã¯ã€Perl ã® File::Path モジュール㮠rmtree 関数ã«é–¢ã™ã‚‹ CVE ㌠3件発表ã•ã‚ŒãŸã€‚ (CVE-2008-2827, CVE-2008-5302, CVE-2008-5303)ã¾ãŸã€symlink attack ã«é–¢ã™ã‚‹ CVE 㯠100件以上出ã¦ã„る。 テンãƒãƒ©ãƒªãƒ•ã‚¡ã‚¤ãƒ«ã®æ‰±ã„ã«é–¢ã™ã‚‹å•é¡Œã¯å¤ãã‹ã‚‰ã‚ã‚‹ãŒã€ã„ã¾ã ã«å¤šãã®å•é¡ŒãŒç™ºç”Ÿã™ã‚‹ã€‚ãã“ã§æœ¬ç¨¿ã§ã¯ãƒ†ãƒ³ãƒãƒ©ãƒªãƒ•ã‚¡ã‚¤ãƒ«ã®æ‰±ã„ã‹ãŸã«ã¤ã„ã¦è§£èª¬ã™ã‚‹ã€‚ã¾ãŸã€å®‰å…¨ãªå‰Šé™¤ã«åˆ©ç”¨ã§ãã‚‹æ–°ã—ã„システムコールãŒæ案ã•ã‚Œã¦ã„ã‚‹ã®ã§ã€ãã‚Œã«ã¤ã„ã¦ã‚‚触れる。 テンãƒãƒ©ãƒªãƒ•ã‚¡ã‚¤ãƒ«ã¯ãƒ—ãƒã‚°ãƒ©ãƒ ãŒä¸€æ™‚çš„ã«åˆ©ç”¨ã™ã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã§ã‚る。 Unix ã«ãŠã„ã¦ã¯ /tmp ã‚„ /var/tmp ã¨ã„ã†ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªãŒæä¾›ã•ã‚Œã¦ãŠã‚Šã€ã™ã¹ã¦ã®ãƒ¦ãƒ¼ã‚¶ãŒãã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªä¸‹ã«ãƒ†ãƒ³ãƒãƒ©ãƒªãƒ•ã‚¡ã‚¤ãƒ«ã‚’生æˆãƒ»å‰Šé™¤ã™ã‚‹ã®ãŒæ…£ç¿’ã§ã‚る。本稿ã§ã¯ã€ã“れらã®ãƒ‡
C言語・C++言語用テスティングフレームワーク - Cutter
最新リリース 2019-09-13ã«ãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸ1.2.7ãŒæœ€æ–°ã§ã™ã€‚ [ダウンãƒãƒ¼ãƒ‰] [変更点] Cutterã¨ã¯ Cutterã¯æ›¸ãã‚„ã™ã•ãƒ»ãƒ‡ãƒãƒƒã‚°ã®ã—ã‚„ã™ã•ã‚’é‡è¦–ã—ãŸC言語・C++言語用ã®ãƒ†ã‚¹ãƒ†ã‚£ãƒ³ã‚°ãƒ•ãƒ¬ãƒ¼ãƒ ワークã§ã™ã€‚メンテナンスã—ã‚„ã™ãã€åˆ©ç”¨åŠ¹æžœã®é«˜ã„å˜ä½“テスト（ユニットテスト）ã®é–‹ç™ºã‚’支æ´ã—ã¾ã™ã€‚ ã¾ãŸã€ãƒ†ã‚¹ãƒˆã‚’苦痛ã§ã¯ãªãã€æ¥½ã—ã„ã‚‚ã®ã«ã™ã‚‹ã“ã¨ã‚‚é‡è¦–ã—ã¦ã„ã¾ã™ã€‚スクリーンショットã¯ãƒ†ã‚¹ãƒˆçµæžœã®é€šçŸ¥æ©Ÿèƒ½ã‚’利用ã—ã¦ã„る様åã§ã™ã€‚æ–‡å—ã¨ã—ã¦ãƒ†ã‚¹ãƒˆã®ãƒ‘ス・失敗をä¼ãˆã‚‹ã ã‘ã§ã¯ãªãã€è¦–覚的ã«ã‚‚通知ã™ã‚‹ã“ã¨ã§ã€ãƒ†ã‚¹ãƒˆçµæžœã‚’ã‚ã‹ã‚Šã‚„ã™ãã—ã¾ã™ã€‚ã‚ã‹ã‚Šã‚„ã™ã„ã®ã§ã€é »ç¹ã«ãƒ†ã‚¹ãƒˆã‚’実行ã—ãŸããªã‚Šã¾ã™ã€‚ã“ã®æ©Ÿèƒ½ã¯notify-sendコマンド（Linuxã‚„*BSDãªã©ã®å ´åˆï¼‰ã¾ãŸã¯growlnotifyコマンド（macOSã®å ´åˆï¼‰ã‚’利用ã—ã¾ã™ã€‚ 動作環境 Cutterã¯Debian GNU/L
Coroutines in C
by Simon Tatham [Coroutines trilogy: C preprocessor | C++20 native | general philosophy ] Introduction Structuring a large program is always a difficult job. One of the particular problems that often comes up is this: if you have a piece of code producing data, and another piece of code consuming it, which should be the caller and which should be the callee? Here is a very simple piece of run-leng
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The Development of the C Language
The Development of the C Language* Dennis M. Ritchie Bell Labs/Lucent Technologies Murray Hill, NJ 07974 USA [email protected] ABSTRACT アブストラクト The C programming language was devised in the early 1970s as a system implementation language for the nascent Unix operating system. Derived from the typeless language BCPL, it evolved a type structure; created on a tiny machine as a tool to improve a meag
On Loving C.. 日本語訳
以下ã®æ–‡ç« ã¯ã€Michael Feathers ã«ã‚ˆã‚‹ On Loving C.. ã®æ—¥æœ¬èªžè¨³ã§ã‚る。 æ–‡ä¸ã®å›ºæœ‰åè©žãªã©ã«ã¤ã„ã¦ç†è§£ã®åŠ©ã‘ã¨ãªã‚‹ã‚ˆã† Wikipedia ã¸ã®ãƒªãƒ³ã‚¯ã‚’åŠ ãˆã•ã›ã¦ã‚‚らã£ãŸã€‚ èªã‚ãªã‘ã‚Œã°ãªã‚‰ãªã„ã“ã¨ãŒã‚る。ç§ã¯ C ã‚’æ„›ã—ã¦ã„る。ã—ã°ã‚‰ãã¯ãれをæ„è˜ã—ã¦ã„ã¦ã‚‚ã€å¿˜ã‚ŒãŒã¡ã 。Rubyã€Haskellã€OCamlã€C++ã€Javaã€ãã—㦠C# ã«å¿ƒç§»ã‚Šã—ãŸã“ã¨ã‚‚ã‚る――今も多ãã®è¨€èªžã«æ™‚間を割ã„ã¦ã„ã‚‹ãŒã€C ã®å…ƒã«æˆ»ã£ã¦ãã‚‹ã¨ã€ç§ã¯æ•…郷ã«å¸°ã£ãŸã‚ˆã†ãªæ°—æŒã¡ã«ãªã‚‹ã€‚ ç§ã¯ä½•åå¹´ã‚‚å‰ã« Kernighan 㨠Ritchie ã®æœ¬ã‚’パラパラã¨ã‚ãã£ãŸã¨ãã®ã“ã¨ã‚’覚ãˆã¦ã„る。C ã«ã¯ã¨ã¦ã‚‚欲求ä¸æº€ã‚’æ„Ÿã˜ãŸè¨˜æ†¶ã‚‚ã‚ã‚‹ãŒã€ã¨ã¦ã‚‚満足を与ãˆã¦ãã‚ŒãŸã“ã¨ã‚‚覚ãˆã¦ã„る。C ã«ã¯ãƒ˜ãƒ³ãªã¨ã“ã‚ãŒã‚ã‚‹ãŒã€æŒ¯ã‚Šè¿”ã£ã¦ã¿ã‚‹ã¨ã€ãã‚Œã¯å¤šãã®ä»–ã®è¨€èªžã®ãƒ˜ãƒ³ã•ã«æ¯”ã¹ã‚Œã°ä¸å¯è§£ãªã¨ã“ã‚ã¯ãšã£ã¨
http://google-styleguide.googlecode.com/svn/trunk/google-c-style.el
;;; google-c-style.el --- Google's C/C++ style for c-mode ;; Keywords: c, tools ;; google-c-style.el is Copyright (C) 2008 Google Inc. All Rights Reserved. ;; ;; It is free software; you can redistribute it and/or modify it under the ;; terms of either: ;; ;; a) the GNU General Public License as published by the Free Software ;; Foundation; either version 1, or (at your option) any later version,
C(++)言語: valgrindã®ä½¿ã„æ–¹
ubuntu% uname -a Linux ubuntu 2.6.12-10-386 #1 Sat Mar 11 16:13:17 UTC 2006 i686 GNU/Linux ubuntu% valgrind --version valgrind-3.0.1 (0) 目次 Valgrindã«å«ã¾ã‚Œã‚‹ãƒ„ール Memcheck: メモリエラーを検出ã™ã‚‹(default) Cachegrind: ã‚ャッシュミスを検出ã™ã‚‹ Massif: ヒーププãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’使ㆠã¾ã¨ã‚ valgrindã®ä½¿ã„æ–¹ã¨ã‚¨ãƒ©ãƒ¼ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’æ•´ç†ã—ã¦ã¿ãŸã€‚「valgrind --leak-check=full commandã€ã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã‚’よã用ã„る。ã“ã‚Œã«ã‚ˆã‚Šãƒ¡ãƒ¢ãƒªå‘¨ã‚Šã®ãƒã‚°ã‚’検出出æ¥ã‚‹ã€‚ --tool=cachegrindã§ã¯ãƒ—ãƒã‚°ãƒ©ãƒ 実行時ã®ã‚ャッシュミス率を測定ã™ã‚‹äº‹ãŒå‡ºæ¥ã‚‹ã€‚cg_annotateã‚’
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On C Library Implementation
GitHub - google/cmockery: A lightweight library to simplify and generalize the process of writing unit tests for C applications.
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