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What is an application binary interface (ABI)?
...e, you access the library through an API. Once the code is compiled, your application accesses the binary data in the library through the ABI. The ABI defines the structures and methods that your compiled application will use to access the external library (just like the API did), only on a lower ...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...essor, but decrease performance on your particular processor (and the same applies to -Os). If you try the same example on different processors, you will find that on some of them benefit from -O2 while other are more favorable to -Os optimizations.
Here are the results for time ./test 0 0 on sever...
Class does not implement its superclass's required members
...ta 5 today and noticed I received errors in nearly all of my subclasses of Apple's classes.
4 Answers
...
Tactics for using PHP in a high-load site
...isn't cutting, there are several techniques to scale up, depending on your app. Replicating to additional servers typically works well if you have more reads than writes. Sharding is a technique to split your data over many machines.
Caching
You probably don't want to cache in your database. The...
Algorithm to find top 10 search terms
....
Useful book in this area:
Muthukrishnan - "Data Streams: Algorithms and Applications"
Closely related reference to the problem at hand which I picked from the above:
Manku, Motwani - "Approximate Frequency Counts over Data Streams" [pdf]
By the way, Motwani, of Stanford, (edit) was an author of...
“Keep Me Logged In” - the best approach
My web application uses sessions to store information about the user once they've logged in, and to maintain that information as they travel from page to page within the app. In this specific application, I'm storing the user_id , first_name and last_name of the person.
...
Reset/remove CSS styles for element only
.... For
example certain elements like textarea by default have a border,
applying this reset will render those textarea's border less.
[POST EDIT FEB 4, '17]
Upvoted for becoming a modern norm, user Joost
#reset-this-parent {
all: initial;
* {
all: unset;
}
}
EXAMPLE FROM W3
Fo...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... Paxos，改进后的后者为Fast Paxos。
总结
下图来自：Google App Engine的co-founder Ryan Barrett在2009年的google i/o上的演讲《Transaction Across DataCenter》（视频： http://www.youtube.com/watch?v=srOgpXECblk）
前面，我们说过，要想让数据有高可用性，...
Fundamental difference between Hashing and Encryption algorithms
...ant an explanation, I'll do my best here:
Hash Functions
They provide a mapping between an arbitrary length input, and a (usually) fixed length (or smaller length) output. It can be anything from a simple crc32, to a full blown cryptographic hash function such as MD5 or SHA1/2/256/512. The point...
Two-way encryption: I need to store passwords that can be retrieved
I am creating an application that will store passwords, which the user can retrieve and see. The passwords are for a hardware device, so checking against hashes are out of the question.
...