Damien Katz: The Unreasonable Effectiveness of C
For years I've tried my damnedest to get away from C. Too simple, too many details to manage, too old and crufty, too low level. I've had intense and torrid love affairs with Java, C++, and Erlang. I've built things I'm proud of with all of them, and yet each has broken my heart. They've made promises they couldn't keep, created cultures that focus on the wrong things, and made devastating tradeof
Objective-C const NSString * vs NSString * const
I'm trying to a NSString constant in my .h file to be defined in my .m. I understand that extern NSString * const variableName; in the .h and NSString * const variableName = @"variableValue"; is the way to do this. Examining C tutorials I see that const is supposed to go before variable definitions. My question is why is it not declared as extern const NSString * variableName; in the .h and const
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Memory management in C programs
Tags: nethack internals c memory programming | Written by Alex Smith, 2014-03-16 One large difference between C and most other programming languages is that in C, you have to handle memory yourself rather than having a garbage collector do it for you. Ensuring that memory is allocated at the correct moment is not very difficult (and something that needs to be done manually in pretty much every lan
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é•·ã„æ´å²ã‚’æŒã¡ãªãŒã‚‰ã€ä¾ç„¶ã¨ã—ã¦äººæ°—ã®é«˜ã„C言語。ãã®æœ€æ–°ä»•æ§˜ã®æƒ…å ±ã«ã‚ャッãƒã‚¢ãƒƒãƒ—ã™ã‚‹ãŸã‚ã®é€£è¼‰ã‚¹ã‚¿ãƒ¼ãƒˆã€‚今回ã¯1999å¹´ã«ç–定ã•ã‚ŒãŸã€ŒC99ã€ã‚’å–り上ã’る。 連載 INDEX 次回 → C言語（以é™ã€å˜ã«C）ã¯Dennis Ritchieã«ã‚ˆã£ã¦1969～1973å¹´ã®é–“ã«ãƒ™ãƒ«ç ”ã«ã¦é–‹ç™ºã•ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã§ã‚る。長ã„æ´å²ã‚’æŒã¤ã¨å…±ã«éžå¸¸ã«ãƒãƒ”ュラーãªè¨€èªžã§ã€ãƒ—ãƒã‚°ãƒ©ãƒžãƒ¼ã§Cを知らãªã„人ã¯ã¾ãšã„ãªã„ã¨è¨€ã£ã¦ã„ã„ã ã‚ã†ã€‚プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã®ã‚·ã‚§ã‚¢ã‚’調査ã—ã¦ã„ã‚‹TIOBEã§ã‚‚ã€ã“ã“最近ã¯å¸¸ã«1ã€2ä½ã‚’å ã‚ã¦ã„る。 Cã®è¨€èªžä»•æ§˜ã¯ä»Šã‹ã‚‰25å¹´è¿‘ãå‰ã§ã‚ã‚‹1989å¹´ã«åˆã‚ã¦è¦æ ¼åŒ–ã•ã‚Œã€ã“ã‚Œã¯ä¸€èˆ¬ã«ã€ŒANSI-Cã€ã¨å‘¼ã°ã‚Œã¦ã„る。ANSI-Cã¯é•·ã‚‰ãCã®è¨€èªžä»•æ§˜ã®ã‚¹ã‚¿ãƒ³ãƒ€ãƒ¼ãƒ‰ã®ä½ç½®ã‚’å ã‚ã€ä¸–ã®ä¸ã®å¤§åŠã®ãƒ—ãƒã‚°ãƒ©ãƒžãƒ¼ã¯ã€ã“ã®ANSI-Cã«æ…£ã‚Œè¦ªã—ã‚“ã§ã„ã‚‹ã“ã¨ã ã‚ã†ã€‚ã—ã‹ã—ã€å®Ÿã¯Cã®è¨€èªžä»•æ§˜ã¯ãã®
mrubyã®mrb_gc_arena_save()/mrb_gc_arena_restore()ã®ä½¿ã„æ–¹ - Matzã«ã£ã(2013-07-31)
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Post by @vedantk
apply() is an important component of languages that support higher-order programming. It's usually built into a language, but it isn't really available in C. Since C has support for dynamic typing (in the form of void*) and first-class functions, I thought it might be possible to implement apply() in C. My approach was to mmap() an executable buffer and then craft a payload that loads arguments to
Embedded in Academia : A Quiz About Integers in C
The C language's rules for integer operations have some quirks that can make even small programs behave in confusing ways. This post is a review of these rules in the form of a quiz containing 20 questions. It is not intended to be extremely tricky, and I expect serious C programmers to get high scores. I recommend going through the questions in order. You should assume C99. Also assume that x86 o
Faster than C ― Andreas Zwinkau
Judging the performance of programming languages, usually C is called the leader, though Fortran is often faster. New programming languages commonly use C as their reference and they are really proud to be only so much slower than C. Few language designer try to beat C. What does it take for a language to be faster than C? Better Aliasing Information Aliasing describes the fact that two references
In-memory key-value store in C, Go and Python
During my paternity leave, I built an in-memory hashmap in Go, Python, and C to explore implementing an alternative to memcached and to challenge my programming skills across these languages. Each version supports the essential `get` and `set` commands from the memcached protocol, allowing it to work with a memcached client. The code is available on GitHub as Key-Value-Polyglot, and I've actively
Metaprogramming custom control structures in C
by Simon Tatham This article describes a technique for using the C preprocessor to implement a form of metaprogramming in C, allowing a programmer to define custom looping and control constructions which behave syntactically like C's own for, while and if but manage control flow in a user-defined way. The technique is almost all portable C89, except that some constructions need the feature (availa
C Programming Puzzlers
These questions originally appeared as an article on programmersheaven.com, written by Ashok K. Pathak, a researcher at Bharat Electronics Limited (CRL), Ghaziabad. They are reproduced here with minor modifications. The questions test advanced knowledge of the C language, including some rarely-used features. Effective C programming requires a strong understanding of concepts like undefined behav
Learn C the Hard Way
Learn to think like the computer hates you, because it does. Learn C The Hard Way (LCTHW) is a practical book teaching real world useful C using the same proven Learn The Hard Way method. LCTHW teaches real robust C coding and defensive programming tactics on real hardware rather than abstract machines and pedantic theory. The book emphasizes breaking your code on purpose, and in the process teach
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The 'volatile' keyword in the C language
__VA_ARGS__ Macro expansion
https://git.kernel.org/pub/scm/linux/kernel/git/kay/libabc.git/plain/README
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GitHub - halayli/lthread: lthread, a multicore enabled coroutine library written in C
Restricting symbols in a Linux static library
Amazon.com: C Programming: A Modern Approach: King, K. N.: Books
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