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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...
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...cking this information down on my own, and I wanted to help others benefit from that effort. "To be crystal clear, it is not merely OK to ask and answer your own question, it is explicitly encouraged." blog.stackoverflow.com/2011/07/…
– Rick Hanlon II
Jun 16 ...
“find: paths must precede expression:” How do I specify a recursive search that also finds files in
...
From find manual:
NON-BUGS
Operator precedence surprises
The command find . -name afile -o -name bfile -print will never print
afile because this is actually equivalent to find . -name afile -o \(
-name...
XmlWriter to Write to a String Instead of to a File
...
This is a question from 2009. So, the value in providing an answer now would be for future users who might have similar issues. Consequently, answers to old questions like this should only be provided if they can clearly identify the problem an...
How to add a border just on the top side of a UIView
...ur subclass too, you can apply it to anything and everything that inherits from UIView - reusable in your project, and any others. Pass in other arguments to your methods to define other colours and widths. Many options.
sha...
Java Synchronized Block for .class
... the other hand, can have code above and below them, that can get executed from multiple threads. They only synchronize within the block! That is not the same!
– JacksOnF1re
Mar 15 '18 at 15:31
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