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Ball to Ball Collision - Detection and Handling
...de, just check whether the distance between their centers is less than two times the radius. To do a perfectly elastic collision between the balls, you only need to worry about the component of the velocity that is in the direction of the collision. The other component (tangent to the collision) wil...
Why is Magento so slow? [closed]
...llow you to override classes. This is a powerful feature, but it means anytime a model, helper, or controller is instantiated, extra PHP instructions need to run to determine if an original class file or an override class files is needed. This adds up.
Besides the layout system, Magento's template...
What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
What's the difference between getPath() , getAbsolutePath() , and getCanonicalPath() in Java?
6 Answers
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What is the best django model field to use to represent a US dollar amount?
I need to store a U.S. $ dollar amount in a field of a Django model. What is the best model field type to use? I need to be able to have the user enter this value (with error checking, only want a number accurate to cents), format it for output to users in different places, and use it to calculate...
Is there a way to get the source code from an APK file?
... as well as functions given random names. It could take significantly more time to try to decompile and restore it into the code you had, than it will be to start over.
Sadly, things like this have killed many projects.
For the future, I highly recommend learning a Version Control System, like CVS,...
Measuring the distance between two coordinates in PHP
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@PratikCJoshi - Finally found the time to add a note about using different units.
– martinstoeckli
Aug 24 '15 at 12:06
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Does using final for variables in Java improve garbage collection?
...es:
public class MyClass {
public final MyOtherObject obj;
}
Every time you create an instance of MyClass, you'll be creating an outgoing reference to a MyOtherObject instance, and the GC will have to follow that link to look for live objects.
The JVM uses a mark-sweep GC algorithm, which h...
Android List View Drag and Drop sort
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I have been working on this for some time now. Tough to get right, and I don't claim I do, but I'm happy with it so far. My code and several demos can be found at
https://github.com/bauerca/drag-sort-listview
Its use is very similar to the TouchInterceptor (...
Test iOS app on device without apple developer program or jailbreak
...velopers. We truly are living in an ideologically reformed era, and what a time it is to be alive.
– lol
Oct 1 '15 at 5:50
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Find and copy files
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find -iname '*.mp3' -mtime -1 -exec cp {} /home/my_path/ \; is there anything wrong with this command ? it's not working
– mrid
Feb 20 '18 at 5:13
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