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Static Initialization Blocks
...
The non-static block:
{
// Do Something...
}
Gets called every time an instance of the class is constructed. The static block only gets called once, when the class itself is initialized, no matter how many objects of that type you create.
Example:
public class Test {
...
C++ Best way to get integer division and remainder
...mbined division & mod. I compiled these with gcc -O3, I had to add the call to doNothing to stop the compiler from optimising everything out (output would be 0 for the division + mod solution).
Take it with a grain of salt:
#include <stdio.h>
#include <sys/time.h>
#include <stdl...
What are the effects of exceptions on performance in Java?
...r in most cases (as everything is put on the stack which cleans up automatically if the method exists).
Sun and others recognized, that this is possibly suboptimal and of course VMs get faster and faster over the time. There is another way to implement exceptions, which makes try itself lightning f...
How do I return clean JSON from a WCF Service?
...s and it just works.
Also check out IIRF or another URL rewriter to get rid of the .svc in the URI.
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Cannot drop database because it is currently in use
...rchar(max)
SELECT @SQL = COALESCE(@SQL,'') + 'Kill ' + Convert(varchar, SPId) + ';'
FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId
--SELECT @SQL
EXEC(@SQL)
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Swift and mutating struct
...le and immutable. If you assign a struct value to an immutable storage (we call it let or constant in Swift) the value becomes immutable mode, and you cannot change any state in the value. (including calling any mutating method)
If the value is assigned to a mutable storage (we call it var or vari...
Correct way to close nested streams and writers in Java [duplicate]
...give the implementer a way to track things to close
// assumes this is called in order for nested closeables,
// inner-most to outer-most
protected final <T extends Closeable> T autoClose(T closeable) {
closeables_.add(0, closeable);
return closeable;
}
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Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
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The reason the calls behave different is they bind to very different methods.
The == case will bind to the static reference equality operator. There are 2 independent boxed int values created hence they are not the same reference.
In t...
django MultiValueDictKeyError error, how do I deal with it
...proach is pretty common. If you're catching the exception it won't automatically generate a stacktrace. docs.python.org/2/glossary.html#term-eafp
– bjudson
Sep 22 '13 at 21:29
9
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Javascript event handler with parameters
...lements[i]));
It is also possible to use .bind() to add arguments to a callback. Any arguments you pass to .bind() will be prepended to the arguments that the callback itself will have. So, you could do this:
elem.addEventListener('click', function(a1, a2, e) {
// inside the event handler...