... Kevin Panko 7,57399 gold badges4646 silver badges5757 bronze badges answered May 23 '13 at 9:33 Saurabh BholaSaurabh B...

...生成这样一份摘要 “第50个字是我，第100个字是爱， 第998个字是你”，那么你女朋友收到这个摘要，检查一下你的邮件就可以了。 Hash算法有两个非常主要的特征： 不能通过摘要来反推出原文 原文的非常细小的改动，都会...

... Bruno BronoskyBruno Bronosky 49.3k99 gold badges122122 silver badges111111 bronze badges add a ...

... Pete 12.3k99 gold badges3434 silver badges4848 bronze badges answered Dec 15 '08 at 7:49 Vinko VrsalovicVinko V...

... If your distribution is pretty known and unbalanced, like 99% of the rows are bit = 1 and the 1% are bit = 0, when you do a WHERE clause with bit = 1, a full table scan will be around the same time as the index scan. If you want to have a fast query where bit = 0, the best way I kn...

... C99 supports macros with variadic arguments; depending on your compiler, you might be able to declare a macro that does what you want: #define my_printf(format, ...) \ do { \ fprintf(stderr, "Calling printf with f...

...different versions of the standard. 500 - X/Open 5, incorporating POSIX 1995 600 - X/Open 6, incorporating POSIX 2004 700 - X/Open 7, incorporating POSIX 2008 You can tell which one you need (if any) by looking at the man page for each function you call. For example, man strdup says: Featur...

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... Mathew BergMathew Berg 26.5k99 gold badges6464 silver badges8484 bronze badges ...

... user2282497 19111 silver badge99 bronze badges answered Apr 27 '11 at 11:07 clairesuzyclairesuzy 25.5k77 gol...