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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...
Why doesn't String switch statement support a null case?
I am just wondering why the Java 7 switch statement does not support a null case and instead throws NullPointerException ? See the commented line below (example taken from the Java Tutorials article on switch ):
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Clear form field after select for jQuery UI Autocomplete
I'm developing a form, and using jQuery UI Autocomplete. When the user selects an option, I want the selection to pop into a span appended to the parent <p> tag. Then I want the field to clear rather than be populated with the selection.
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Any way to modify Jasmine spies based on arguments?
I have a function I'd like to test which calls an external API method twice, using different parameters. I'd like to mock this external API out with a Jasmine spy, and return different things based on the parameters. Is there any way to do this in Jasmine? The best I can come up with is a hack using...
Fit background image to div
I have a background image in the following div, but the image gets cut off:
5 Answers
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Understanding NSRunLoop
Can anyone explain for what is NSRunLoop ? so as I know NSRunLoop is a something connected with NSThread right? So assume I create a Thread like
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How do you receive a url parameter with a spring controller mapping
This issue seems trivial, but I can't get it to work properly. I'm calling my Spring controller mapping with jquery ajax. The value for someAttr is always empty string regardless of the value in the url. Please help me determine why.
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Hash and salt passwords in C#
I was just going through one of DavidHayden's articles on Hashing User Passwords .
14 Answers
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Iterating a JavaScript object's properties using jQuery
Is there a jQuery way to perform iteration over an object's members, such as in:
4 Answers
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How to get a dependency tree for an artifact?
dependency:tree can be used to see the dependency tree for a given project. But what I need is to see the dependency tree for a 3rd party artifact.
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