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Random string generation with upper case letters and digits
...random string of length string_length."""
random = str(uuid.uuid4()) # Convert UUID format to a Python string.
random = random.upper() # Make all characters uppercase.
random = random.replace("-","") # Remove the UUID '-'.
return random[0:string_length] # Return the random string.
p...
How to remove all callbacks from a Handler?
...nable myRunnable = new Runnable() {
public void run() {
//Some interesting task
}
};
You can call myHandler.postDelayed(myRunnable, x) to post another callback to the message queue at other places in your code, and remove all pending callbacks with myHandler.removeCallbacks(myRunna...
Should functions return null or an empty object?
...
Returning null is usually the best idea if you intend to indicate that no data is available.
An empty object implies data has been returned, whereas returning null clearly indicates that nothing has been returned.
Additionally, returning a null will result in a null ex...
How does zip(*[iter(s)]*n) work in Python?
... i.e. a list of length n, where each element is x. *arg unpacks a sequence into arguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and it pulls an item from the iterator each time.
x = iter([1,2,3,4,5,6,7,8,9])
print zip(x, x, x)
...
What exactly is metaprogramming?
...data structure. This is known as homoiconicity. Secondly, LISP code can be converted into data easily using QUOTE. For example (+ 1 2 3) adds 1+2+3 and (QUOTE (+ 1 2 3)) creates an expression that adds 1+2+3 when evaluated. Thirdly, LISP provided a meta-circular evaluator that allows you to use the ...
Integrate ZXing in Android Studio
...
I was integrating ZXING into an Android application and there were no good sources for the input all over, I will give you a hint on what worked for me - because it turned out to be very easy.
There is a real handy git repository ...
How to check task status in Celery?
... a computation. For instance if I want to show article X to a user, I must convert it from XML to HTML, but before that, I must have resolved all bibliographical references. (X is like a journal article.) I check whether the goal "article X with all bibliographical references resolved" exists and us...
How do I make JavaScript beep?
...mo
http://jsfiddle.net/7EAgz/
Conversion Tool
And here is where you can convert mp3 or wav files into Data URI format:
https://dopiaza.org/tools/datauri/index.php
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What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
... It's not a canonical path.
A canonical path is always an absolute path.
Converting from a path to a canonical path makes it absolute (usually tack on the current working directory so e.g. ./file.txt becomes c:/temp/file.txt). The canonical path of a file just "purifies" the path, removing and re...
Lazy Method for Reading Big File in Python?
...ne by line was not an option, but I still needed to process it row by row.
Converting'|' to '\n' before processing was also out of the question, because some of the fields of this csv contained '\n' (free text user input).
Using the csv library was also ruled out because the fact that, at least in e...