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What is the difference between user and kernel modes in operating systems?
...inology).
Entered with the svc instruction (SuperVisor Call), previously known as swi before unified assembly, which is the instruction used to make Linux system calls. Hello world ARMv8 example:
hello.S
.text
.global _start
_start:
/* write */
mov x0, 1
ldr x1, =msg
ldr x2, =len
...
Java 8: Lambda-Streams, Filter by Method with Exception
...em trying out the Lambda expressions of Java 8.
Usually it works fine, but now I have methods that throw IOException 's.
It's best if you look at the following code:
...
What are “first class” objects?
...{ return n * 2; }
void g(Action<int> a, int n) { return a(n); }
// Now call g and pass f:
g(f, 10); // = 20
This is an example in C# where functions actually aren't first-class objects. The above code therefore uses a small workaround (namely a generic delegate called Action<>) to p...
What's the difference between equal?, eql?, ===, and ==?
I am trying to understand the difference between these four methods. I know by default that == calls the method equal? which returns true when both operands refer to exactly the same object.
...
Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
...rly how they are implemented and what are their return values in order to know in which situation I have to use them.
2 Ans...
How do arrays in C# partially implement IList?
So as you may know, arrays in C# implement IList<T> , among other interfaces. Somehow though, they do this without publicly implementing the Count property of IList<T> ! Arrays have only a Length property.
...
Maven parent pom vs modules pom
...an live with pattern #1 (do the simplest thing that could possibly work).
Now, about the bonus questions:
Where is the best place to define the various shared configuration as in source control, deployment directories, common plugins etc. (I'm assuming the parent but I've often been bitten b...
Spring RestTemplate - how to enable full debugging/logging of requests/responses?
...
We have been using this technique for about 3 months now. It only works with RestTemplate configured with a BufferingClientHttpResponseWrapper as @sofienezaghdoudi implies. However, it does not work when used in tests using spring's mockServer framework since MockRestServiceS...
C# listView, how do I add items to columns 2, 3 and 4 etc?
...FullRowSelect = true"... otherwise only column 1 is clickable. I wish I'd known this earlier! it would have saved me a ton of work.
– John Henckel
Jun 1 '15 at 15:18
...
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...ram is right because you understand how it works, not right by accident.)
Now suppose you make a variable which is an alias of a volatile field by passing a ref to that field. Inside the called method, the compiler has no reason whatsoever to know that the reference needs to have volatile semantics...