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Ball to Ball Collision - Detection and Handling
...y mass, the new velocities can be calculated using the equations (where v1 and v2 are the velocities after the collision, and u1, u2 are from before):
If the balls have the same mass then the velocities are simply switched. Here's some code I wrote which does something similar:
void Simulati...
In PHP, what is a closure and why does it use the “use” identifier?
I'm checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny:
6 Answers
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How can I split a text into sentences?
...Russian -- see can NLTK/pyNLTK work “per language” (i.e. non-english), and how?.
– martineau
Jan 2 '11 at 0:28
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Differences between MySQL and SQL Server [closed]
...ho has used Microsoft SQL Server for all my database needs (both at work and for personal projects).
12 Answers
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static allocation in java - heap, stack and permanent generation
I have been lately reading a lot on memory allocation schemes in java, and there have been many doubts as I have been reading from various sources. I have collected my concepts, and I would request to go through all of the points and comment on them. I came to know that memory allocation is JVM spec...
What do 'lazy' and 'greedy' mean in the context of regular expressions?
Could someone explain these two terms in an understandable way?
12 Answers
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Swift compiler segmentation fault when building
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When you run into a compiler segfault in Swift, you don't get a handy line number and error message. Here's how you can track the problem down:
Create a new file called SegFaultDebugger.swift in your project.
In this new file, define an extension to the class that's giving you problems.
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How do I get IntelliJ to recognize common Python modules?
...
Just create and add Python SDK
File -> Project Structure -> Project -> Project SDK -> new
and select the installation path of your Python interpreter (for
example, C:\Python26 in windows and /usr/bin/python2.7 in Linux) as...
How to grant permission to users for a directory using command line in Windows?
...sions to a user on a directory (Read, Write, Modify) using the Windows command line?
17 Answers
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In Python, when should I use a function instead of a method?
...nt "can't kill it."
Moving away from this analogy, why do we use methods and classes? Because we want to contain data and hopefully structure our code in a manner such that it will be reusable and extensible in the future. This brings us to the notion of encapsulation which is so dear to OO design...