大约有 30,000 项符合查询结果（耗时：0.0438秒） [XML]
Default template arguments for function templates
... template arguments for function templates is a misbegotten remnant of the time where freestanding functions were treated as second class citizens and required all template arguments to be deduced from the function arguments rather than specified.
The restriction seriously cramps programming st...
Get the IP address of the machine
...he approach requires that you choose a specific external host. Most of the time, any well-known public IP should do the trick. I like Google's public DNS server address 8.8.8.8 for this purpose, but there may be times you'd want to choose a different external host IP. Here is some code that illustra...
Twitter image encoding challenge [closed]
...ng runs of invalid and valid characters.
Anyway, here are some images and times (as measured on my old 3.0GHz P4), and compressed to 140 characters in the full assigned unicode set described above. Overall, I'm fairly pleased with how they all turned out. If I had more time to work on this, I'd p...
pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message
...of copies of uninitialised memory values, this has been suggested multiple times. Unfortunately, almost all programs legitimately copy uninitialised memory values around (because compilers pad structs to preserve alignment) and eager checking leads to hundreds of false positives. Therefore Memcheck ...
What is the fastest way to compute sin and cos together?
...pport it.
Edit:
Intel's documentation states that FSINCOS is just about 5 times slower than FDIV (i.e., floating point division).
Edit:
Please note that not all modern compilers optimize calculation of sine and cosine into a call to FSINCOS. In particular, my VS 2008 didn't do it that way.
Edit:
...
Get specific line from text file using just shell script
... edit suggestion based on your comment, as I agree with it. Hopefully this time it won't be rejected.
– Victor Zamanian
Aug 2 '17 at 10:30
add a comment
| ...
Are the days of passing const std::string & as a parameter over?
...e worst case of something is bound by a constant, then it's still constant time. Is there not a longest small string? Doesn't that string take some constant amount of time to copy? Don't all smaller strings take less time to copy? Then, string copying for small strings is "constant time" in orde...
Why C# fails to compare two object types with each other but VB doesn't?
... the ==, you can get different behaviour - but that's based on the compile-time type of the expressions. For example, string provides ==(string, string):
string x = new string("foo".ToCharArray());
string y = new string("foo".ToCharArray());
Console.WriteLine(x == y); // True
Console.WriteLine((obj...
Convert from MySQL datetime to another format with PHP
I have a datetime column in MySQL.
18 Answers
18
...
Swift: #warning equivalent
...TAGS)/ warning: \$1/"
This will force Xcode to flag a warning at compile time for any // TODO: or // FIXME: comments you markup.
Alternatively, you could amend TAGS with a custom tag: TAGS="WARNING:" in the above code which would keep the default behaviour for TODO & FIXME and would raise a c...