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How to check if a table contains an element in Lua?
...mple:
function addToSet(set, key)
set[key] = true
end
function removeFromSet(set, key)
set[key] = nil
end
function setContains(set, key)
return set[key] ~= nil
end
There's a more fully-featured example here.
...
How do I set the path to a DLL file in Visual Studio?
...
Edit and add one instruction to command line.
for example copy botan.dll from source path to location where is being executed the program.
copy /Y "$(SolutionDir)ProjectDirs\x64\Botan\lib\botan.dll" "$(TargetDir)"
shar...
How to check if an object is a list or tuple (but not string)?
...f the other correct answers. I had no idea that the built-in types inherit from collections.Sequence but I tested it and I see that they do. So does xrange. Even better, this test excludes dict, which has both __getitem__ and __iter__.
– Neil Mayhew
Jun 28 '16 ...
What happens with constraints when a view is removed
... if they're not in iOS 6, it's probably a bug. BTW, the doc for the removeFromSuperview method says, "Calling this method removes any constraints that refer to the view you are removing, or that refer to any view in the subtree of the view you are removing".
– rdelmar
...
How can I git stash a specific file?
...reset
Last step is optional, but usually you want it. It removes changes from index.
Warning
As noted in the comments, this puts everything into the stash, both staged and unstaged. The --keep-index just leaves the index alone after the stash is done. This can cause merge conflicts when you later...
Mongoose indexing in production code
...o it's probably safe to create an index at that time.
In addition to this, from the accepted answer:
So it only has an effect on performance when you're first creating the index, and at that time the collections are often empty so creating an index would be quick anyway.
If you've managed to get y...
What is a good pattern for using a Global Mutex in C#?
...rrent AppDomain and then loaded a new AppDomain and executed the same code from within it).
– Sergey.quixoticaxis.Ivanov
Feb 7 '17 at 14:44
...
How to synchronize a static variable among threads running different instances of a class in Java?
...aring a counter, consider using an AtomicInteger or another suitable class from the java.util.concurrent.atomic package:
public class Test {
private final static AtomicInteger count = new AtomicInteger(0);
public void foo() {
count.incrementAndGet();
}
}
...
Reading a string with scanf
...res value of address &str[0]
strPtr own address in memory is different from the memory address that it stores (address of array in memory a.k.a &str[0])
&strPtr represents the address of strPtr itself
I think that you could declare a pointer to a pointer as:
char **vPtr = &strPtr...
Cannot pass null argument when using type hinting
...
Starting from PHP 7.1, nullable types are available, as both function return types and parameters. The type ?T can have values of the specified Type T, or null.
So, your function could look like this:
function foo(?Type $t)
{
}
A...