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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...figure out how and why
this works, and I can't remember the
details anymore.
A slightly better constant, developed by an expert mathematician (Chris Lomont) trying to work out how the original algorithm worked is:
float InvSqrt(float x)
{
float xhalf = 0.5f * x;
int i = *(int*)&x;...
Does python have an equivalent to Java Class.forName()?
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Reflection in python is a lot easier and far more flexible than it is in Java.
I recommend reading this tutorial
There's no direct function (that I know of) which takes a fully qualified class name and returns the class, however you have all the pieces needed to build...
What is the equivalent of “!=” in Excel VBA?
...ew to VBA, this answer may seem weird, but this, believe it or not, is FAR more efficient than checking against <> ""
– LimaNightHawk
Jan 29 '15 at 16:52
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Generics in C#, using type of a variable as parameter [duplicate]
... pushing the decision one level higher up the stack?
If you could give us more information about what you're doing, that would help. Sometimes you may need to use reflection as above, but if you pick the right point to do it, you can make sure you only need to do it once, and let everything below t...
How to disable UITextField editing but still accept touch?
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More precisely we can use "textFieldShouldBeginEditing" if required
– Naveen Shan
Sep 28 '15 at 9:15
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What do the terms “CPU bound” and “I/O bound” mean?
...the amount and speed of the cache available. A task that simply processes more data than fits in the cache will be cache bound.
I/O Bound would be slower than Memory Bound would be slower than Cache Bound would be slower than CPU Bound.
The solution to being I/O bound isn't necessarily to get mor...
.NET - Dictionary locking vs. ConcurrentDictionary
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Thread-safety is more than just using the right collection. Using the right collection is a start, not the only thing you have to deal with. I guess that is what the OP wanted to know. I can't guess why this was accepted, it's been a while si...
How to return multiple lines JSX in another return statement in React?
... clear that the second snippet doesn't really make sense (you can't return more than one value in JS). You have to either wrap it in another element (most likely what you'd want, that way you can also provide a valid key property), or you can use something like this:
{[1,2,3].map(function (n) {
r...
C# difference between == and Equals()
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