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How to encrypt String in Java
...ou need to pick a symmetric key Block Cipher. A Block Cipher is a computer function/program used to create Pseudo-Randomness. Pseudo-Randomness is fake randomness that no computer other than a Quantum Computer would be able to tell the difference between it and real randomness. The Block Cipher is l...
Asking the user for input until they give a valid response
...u are not able to vote in the United States.")
Encapsulating it All in a Function
If you need to ask your user for a lot of different values, it might be useful to put this code in a function, so you don't have to retype it every time.
def get_non_negative_int(prompt):
while True:
tr...
Why is Git better than Subversion?
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Linus' talk is fun to watch. He brutally rips centralized version control systems like Subversion and CVS. However, Randal Schwartz' youtube.com/watch?v=8dhZ9BXQgc4 talk is more constructive, more informative and more convincing.
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Why does one use dependency injection?
...iled. It just seems silly. My code is never a mess; I hardly write virtual functions and interfaces (although I do once in a blue moon) and all my configuration is magically serialized into a class using json.net (sometimes using an XML serializer).
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How is the fork/join framework better than a thread pool?
...em to build the final result. So one half is done in an other thread. Have fun doing the same with thread pools without getting a deadlock (possible, but not nearly as simple).
Just for completeness: If you'd actually want to calculate Fibonacci numbers using this recursive approach here is an opti...
What are some (concrete) use-cases for metaclasses?
...ver, on occasion one wants to do interactive plotting. With only a couple functions I found that I was able to increment the figure count, call draw manually, etc, but I needed to do these before and after every plotting call. So to create both an interactive plotting wrapper and an offscreen plot...
Getting started with Haskell
For a few days I've tried to wrap my head around the functional programming paradigm in Haskell. I've done this by reading tutorials and watching screencasts, but nothing really seems to stick.
Now, in learning various imperative/OO languages (like C, Java, PHP), exercises have been a good way for m...
When to use Storyboard and when to use XIBs
...could just type those 3 lines of code right here where I am!" No, it's not fun. Switching between code and storyboard (and between keyboard and mouse) gets old fast and slows you down.
Storyboards are hard to refactor: When you refactor your code, you have to make sure it still matches what your sto...
Creating an API for mobile applications - Authentication and Authorization
...dying other implementations). I've got my head wrapped around most of the fundamental concepts but am still looking for guidance in a few areas. The last thing I want to do is reinvent the wheel, but I'm not finding any standard solutions that fits my criteria (however my criteria my be misguided ...