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std::wstring VS std::string
...I character set including special characters?
Notice: A std::string is suitable for holding a 'binary' buffer, where a std::wstring is not!
On Linux? Yes.
On Windows? Only special characters available for the current locale of the Windows user.
Edit (After a comment from Johann Gerell):
a std::st...
'printf' vs. 'cout' in C++
...ze_t, you need to use %zd, while int64_t will require using %"PRId64". The tables are available at http://en.cppreference.com/w/cpp/io/c/fprintf and http://en.cppreference.com/w/cpp/types/integer.
You can't print the NUL byte, \0
Because printf uses C strings as opposed to C++ strings, it cannot p...
What's the best way to communicate between view controllers?
... up and push the controller onto the stack. But as I've become more comfortable with the SDK, I've drifted away from that, and now I usually have the parent push the child.
For #3, consider this example. Here we are using two controllers, AmountEditor and TextEditor, to edit two properties of a T...
Peak signal detection in realtime timeseries data
...score) of 3.5 corresponds to a signaling probability of 0.00047 (from this table), which implies that you expect a signal once every 2128 datapoints (1/0.00047). The threshold therefore directly influences how sensitive the algorithm is and thereby also how often the algorithm signals. Examine your ...
How to avoid reverse engineering of an APK file?
...aller, predefined, values that add up to $200. For example, have a file or table on your server that equates words with values. So let's say that Charlie corresponds to $47, and John to $3. So instead of sending $200, you can send Charlie four times and John four times. On the server, interpret what...
What does f+++++++++ mean in rsync logs?
...to determine what changed. To decode each bit's meaning, use the following table.
Explanation of each bit position and value in rsync's output:
YXcstpoguax path/to/file
|||||||||||
||||||||||╰- x: The extended attribute information changed
|||||||||╰-- a: The ACL information changed
|||||||...
Where does Scala look for implicits?
...s that define which implicits are visible and which are not. The following table showing where the compiler will search for implicits was taken from an excellent presentation about implicits by Josh Suereth, which I heartily recommend to anyone wanting to improve their Scala knowledge. It has been c...
Fundamental difference between Hashing and Encryption algorithms
... store sha512(password), you're not doing a thing to guard against rainbow tables or brute force attacks. Remember, the hash function was designed for speed. So it's trivial for an attacker to just run a dictionary through the hash function and test each result.
Adding a salt helps matters since i...
When is the thread pool used?
...lication but this is one of the unique features that Node.js brings to the table. So, again if you run your node application, it will run in just a single thread. No matter if you have 1 or million users accessing your application at the same time.
So let's understand exactly what happens in the si...
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
...本任意时刻都能读到新值。比如：文件系统，RDBMS，Azure Table都是强一致性的。
从这三种一致型的模型上来说，我们可以看到，Weak和Eventually一般来说是异步冗余的，而Strong一般来说是同步冗余的，异步的通常意味着更好的性能...