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SHA512 vs. Blowfish and Bcrypt [closed]
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It should suffice to say whether bcrypt or SHA-512 (in the context of an appropriate algorithm like PBKDF2) is good enough. And the answer is yes, either algorithm is secure enough that a breach will occur through an implementation flaw, not cryptanalysis.
If you insist on knowing which ...
RESTfully design /login or /register resources?
...f a GET request for logging out.
(from http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Safe_methods)
Some methods (for example, HEAD, GET, OPTIONS and TRACE) are defined as safe, which means they are intended only for information retrieval and should not change the state of the server. In ...
Create a pointer to two-dimensional array
...you wanna make a pointer to the first element of the array
uint8_t (*matrix_ptr)[20] = l_matrix;
With typedef, this looks cleaner
typedef uint8_t array_of_20_uint8_t[20];
array_of_20_uint8_t *matrix_ptr = l_matrix;
Then you can enjoy life again :)
matrix_ptr[0][1] = ...;
Beware of the point...
Java Stanford NLP: Part of Speech labels?
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CC Coordinating conjunction
CD Cardinal number
DT Determiner
EX Existential there
FW Foreign word
IN Preposition or subordinating conjunction
JJ Adjective
JJR Adjective, comparative
JJS Adjective, superlative
LS List item marker
MD Modal
NN Noun, singular or mass...
When should I use mmap for file access?
POSIX environments provide at least two ways of accessing files. There's the standard system calls open() , read() , write() , and friends, but there's also the option of using mmap() to map the file into virtual memory.
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What does “1 line adds whitespace errors” mean when applying a patch?
...You don't need to care.
The warning enacts a standard of cleanliness of text files in regard to whitespace, the kind of thing that many programmers tend to care about. As the manual explains:
What are considered whitespace errors is controlled
by core.whitespace configuration. By default, tra...
Catch multiple exceptions at once?
It is discouraged to simply catch System.Exception . Instead, only the "known" exceptions should be caught.
27 Answers
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MySQL vs MongoDB 1000 reads
I have been very excited about MongoDb and have been testing it lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'.
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TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...—所以叫SYN，全称Synchronize Sequence Numbers。也就上图中的 x 和 y。这个号要作为以后的数据通信的序号，以保证应用层接收到的数据不会因为网络上的传输的问题而乱序（TCP会用这个序号来拼接数据）。
对于4次挥手，其实你...
What's the difference between size_t and int in C++?
In several C++ examples I see a use of the type size_t where I would have used a simple int . What's the difference, and why size_t should be better?
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