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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;...
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...
What is code coverage and how do YOU measure it?
...ode-coverage doesn't mean your code is perfect. Use it as a guide to write more comprehensive (unit-)tests.
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How to easily resize/optimize an image size with iOS?
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Objective-C: Where to remove observer for NSNotification?
...notification. For this... See above.
Edit (since the answer seems to draw more comments than I would have thought) All I am trying to say here is: it's really hard to give general advice as to when it's best to remove the observer from the notification center, because that depends:
On your use ca...
How do I install package.json dependencies in the current directory using npm
... ./node_modules relative to your package.json file (it's actually slightly more complex than this, so check the npm docs here).
You are free to move the node_modules dir to the parent dir of your app if you want, because node's 'require' mechanism understands this. However, if you want to update yo...
Window Features - 更多技术 - 清泛网 - 专注C/C++及内核技术
...e client area. A child window that shares the same parent window as one or more other child windows is called a sibling window. Sibling windows can draw in each other's client area, unless one of the child windows has the WS_CLIPSIBLINGS style. If a child window does have this style, any portion of ...
Java String remove all non numeric characters
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Repository Pattern Step by Step Explanation [closed]
...mmand, etc part that hides the type of database. The repository is usually more domain-centric.
– Fenton
Jun 12 at 9:12
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