大约有 45,000 项符合查询结果（耗时：0.0567秒） [XML]
Is it better to use C void arguments “void foo(void)” or not “void foo()”? [duplicate]
What is better: void foo() or void foo(void) ?
With void it looks ugly and inconsistent, but I've been told that it is good. Is this true?
...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In contrast, Intel C++ Compiler , executable icc , will eliminate the lib...
Why can't a text column have a default value in MySQL?
If you try to create a TEXT column on a table, and give it a default value in MySQL, you get an error (on Windows at least). I cannot see any reason why a text column should not have a default value. No explanation is given by the MySQL documentation. It seems illogical to me (and somewhat frustrati...
Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
I see a lot of people in blog posts and here on SO either avoiding or advising against the usage of the Thread class in recent versions of C# (and I mean of course 4.0+, with the addition of Task & friends). Even before, there were debates about the fact that a plain old thread's functionality c...
What is the difference between sigaction and signal?
... signal() . To follow convention I should use sigaction() but if I was writing from scratch, which should I choose?
9 Ans...
C# Float expression: strange behavior when casting the result float to int
... you know that 6.2f * 10 is not exactly 62 due to floating point rounding (it's actually the value 61.99999809265137 when expressed as a double) and that your question is only about why two seemingly identical computations result in the wrong value.
The answer is that in the case of (int)(6.2f * 10...
How is this fibonacci-function memoized?
...
The evaluation mechanism in Haskell is by-need: when a value is needed, it is calculated, and kept ready in case it is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for...
Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...hile ago I came across some code that marked a member variable of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method:
...
Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
... you C++ developers please give us a good description of what RAII is, why it is important, and whether or not it might have any relevance to other languages?
...
Is there any NoSQL data store that is ACID compliant?
... in a "document" model, e.g. MongoDB) as a direct alternative to the explicit schema in classical RDBMSs. It allows the developer to treat things asymmetrically, whereas traditional engines have enforced rigid same-ness across the data model. The reason this is so interesting is because it provides ...