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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...ion tutorial shows how branch prediction buffers work. The cache buffer is indexed by the lower portion of the address of the branch instruction. This works well unless two important uncorrelated branches share the same lower bits. In that case, you end-up with aliasing which causes many mispredic...
Understanding typedefs for function pointers in C
...= (*myFnPtr)(2.0, 5.1);
This makes good reading: http://www.newty.de/fpt/index.html
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Android Camera Preview Stretched
...ion, but SurfaceView doesn't recognize getChildCount () or getChildAt (int index). I think, I got it working eventually with a reference to maLayoutPreview, but it was misbehaving and applied the set ratio to my whole app and it did so after first picture was taken. So I let it go and moved the layo...
What is the difference between user and kernel modes in operating systems?
...al_Descriptor_Table
the segment registers CS, DS, etc., which point to the index of an entry in the GDT.
For example, CS = 0 means the first entry of the GDT is currently active for the executing code.
What can each ring do?
The CPU chip is physically built so that:
ring 0 can do anything
ri...
Why should I avoid using Properties in C#?
...ess constant metadata about themselves.
Interception, thanks to the above.
Indexers, which everyone who has ever had to work with COM interop and the inevitable spew of Item(i) calls will recognize as a wonderful thing.
Work with PropertyDescriptor which is essential for creating designers and for X...
How to create GUID / UUID?
...haracters whereas broofa did not. Also, note that we can use String Array indexing to keep his slick String template architecture:
function e1() {
var u='',i=0;
while(i++<36) {
var c='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'[i-1],r=Math.random()*16|0,v=c=='x'?r:(r&0x3|0x...
Draw in Canvas by finger, Android
... i;
// now p is just the fractional part [0...1) and i is the index
int c0 = colors[i];
int c1 = colors[i+1];
int a = ave(Color.alpha(c0), Color.alpha(c1), p);
int r = ave(Color.red(c0), Color.red(c1), p);
int g = ave(Color.gre...
GetHashCode Guidelines in C#
...s in the nature of all hashtable implementations, or more generally of any indexed list, that identifying data of objects should never change, while the object is in the list. Unexpected and unpredictable behaviour will occur, if this rule is broken. Somewhere, there may be list implementations, tha...
Difference between variable declaration syntaxes in Javascript (including global variables)?
...
<title>Index.html</title>
<script>
var varDeclaration = true;
noVarDeclaration = true;
window.hungOnWindow = true;
document.hungOnDocument = true;
</script>
<script src="external.js"></scri...
How can I find the data structure that represents mine layout of Minesweeper in memory?
...gging, there's a wealth of tutorials here:
http://memoryhacking.com/forums/index.php
Also, download CheatEngine (mentioned by Nick D.) and work through the tutorial it comes with.
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