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John Carmack's Unusual Fast Inverse Square Root (Quake III)
John Carmack 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 someone explain line by line what exactly is going on here and why t...
Safely override C++ virtual functions
I have a base class with a virtual function and I want to override that function in a derived class. Is there some way to make the compiler check if the function I declared in the derived class actually overrides a function in the base class? I would like to add some macro or something that ensures ...
Plotting time in Python with Matplotlib
I have an array of timestamps in the format (HH:MM:SS.mmmmmm) and another array of floating point numbers, each corresponding to a value in the timestamp array.
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Cannot ignore .idea/workspace.xml - keeps popping up
Using PHPStorm, I am trying to ignore the workspace.xml which pops up every-time I try to make a git commit.
11 Answers
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How can I simulate an anchor click via jquery?
I have a problem with faking an anchor click via jQuery:
Why does my thickbox appear the first time I click on the input button, but not the second or third time?
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Ignore files that have already been committed to a Git repository [duplicate]
I have an already initialized Git repository that I added a .gitignore file to. How can I refresh the file index so the files I want ignored get ignored?
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Ajax success event not working
I have a registration form and am using $.ajax to submit it.
16 Answers
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Android on-screen keyboard auto popping up
One of my apps has an "opening screen" (basically a menu) that has an EditText followed by several Button s. The problem is that several of my users are reporting that when they open the app it's automatically popping up the on-screen keyboard without them even touching the EditText . As far as ...
How to use `string.startsWith()` method ignoring the case?
I want to use string.startsWith() method but ignoring the case.
8 Answers
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Can I embed a custom font in an iPhone application?
I would like to have an app include a custom font for rendering text, load it, and then use it with standard UIKit elements like UILabel . Is this possible?
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