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Why is f(i = -1, i = -1) undefined behavior?
...erations are unsequenced, there is nothing to say that the instructions performing the assignment cannot be interleaved. It might be optimal to do so, depending on CPU architecture. The referenced page states this:
If A is not sequenced before B and B is not sequenced before A, then
two possib...
Position of least significant bit that is set
I am looking for an efficient way to determine the position of the least significant bit that is set in an integer, e.g. for 0x0FF0 it would be 4.
...
Is the != check thread safe?
...ean test() {
return a != a;
}
may produce true. This is the bytecode for test()
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
IF_ACMPEQ L1
...
as we can see it loads field a to local vars twice, it's a non-atomic o...
What is meant by immutable?
...could be the dumbest question ever asked but I think it is quite confusing for a Java newbie.
17 Answers
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How to make git mark a deleted and a new file as a file move?
...According to Git, it is a new file and a removed file. Is there any way to force Git into treating it as a file move?
14 An...
How does a language expand itself? [closed]
... case of e.g. Windows the operating system exposes the so-called WIN32 API for applications running on Windows. The Qt library uses that API to provide applications using Qt to its own API. You use Qt, Qt uses WIN32, WIN32 uses lower levels of the Windows operating system, and so on until it's elect...
What REALLY happens when you don't free after malloc?
This has been something that has bothered me for ages now.
17 Answers
17
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When do you use POST and when do you use GET?
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Use POST for destructive actions such as creation (I'm aware of the irony), editing, and deletion, because you can't hit a POST action in the address bar of your browser. Use GET when it's safe to allow a person to call an action. So ...
Should composer.lock be committed to version control?
...
For applications/projects: Definitely yes.
The composer documentation states on this (with emphasis):
Commit your application's composer.lock (along with composer.json) into version control.
Like @meza said: You should...
When should I really use noexcept?
...
I think it is too early to give a "best practices" answer for this as there hasn't been enough time to use it in practice. If this was asked about throw specifiers right after they came out then the answers would be very different to now.
Having to think about whether or not I n...