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John Car<em>mem>ack's Unusual Fast Inverse Square Root (Quake III)
John Car<em>mem>ack has a special function in the Quake III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can so<em>mem>eone explain line by line what exactly is going on here and why t...
What is the difference between JDK dyna<em>mem>ic proxy and CGLib?
...e of the Proxy Design Pattern , What is the difference between JDK's Dyna<em>mem>ic Proxy and third party dyna<em>mem>ic code generation API s such as CGLib ?
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Difference between Observer, Pub/Sub, and Data Binding
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Here's <em>mem>y take on the three:
Data Binding
Essentially, at the core this just <em>mem>eans "the value of property X on object Y is se<em>mem>antically bound to the value of property A on object B. No assu<em>mem>ptions are <em>mem>ade as to how Y knows or is ...
Why does the C# co<em>mem>piler not fault code where a static <em>mem>ethod calls an instance <em>mem>ethod?
The following code has a static <em>mem>ethod, Foo() , calling an instance <em>mem>ethod, Bar() :
3 Answers
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FixedThreadPool vs CachedThreadPool: the lesser of two evils
I have a progra<em>mem> that spawns threads (~5-150) which perfor<em>mem> a bunch of tasks. Originally, I used a FixedThreadPool because this si<em>mem>ilar question suggested they were better suited for longer lived tasks and with <em>mem>y very li<em>mem>ited knowledge of <em>mem>ultithreading, I considered the average life of the thr...
Referencing a string in a string array resource with x<em>mem>l
I have preferences where you can enable/disable what ite<em>mem>s will show up on the <em>mem>enu. There are 17 ite<em>mem>s. I <em>mem>ade a string array in values/arrays.x<em>mem>l with titles for each of these 17 ite<em>mem>s.
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<em>Mem>ySQL stored procedure vs function, which would I use when?
I'<em>mem> looking at <em>Mem>ySQL stored procedures and function. What is the real difference?
5 Answers
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How ListView's recycling <em>mem>echanis<em>mem> works
So I have this proble<em>mem> I had before, and naturally I asked for help on here . Luksprog's answer was great because I had no idea about how ListView and GridView opti<em>mem>ized itself with recycling Views. So with his advice I was able to change how I added Views to <em>mem>y GridView. Proble<em>mem> is now I have so<em>mem>e...
How to concatenate twice with the C preprocessor and expand a <em>mem>acro as in “arg ## _ ## <em>Mem>ACRO”?
I a<em>mem> trying to write a progra<em>mem> where the na<em>mem>es of so<em>mem>e functions are dependent on the value of a certain <em>mem>acro variable with a <em>mem>acro like this:
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SELECT DISTINCT on one colu<em>mem>n
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Assu<em>mem>ing that you're on SQL Server 2005 or greater, you can use a CTE with ROW_NU<em>Mem>BER():
SELECT *
FRO<em>Mem> (SELECT ID, SKU, Product,
ROW_NU<em>Mem>BER() OVER (PARTITION BY PRODUCT ORDER BY ID) AS RowNu<em>mem>ber
FRO<em>Mem>...