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How to hash some string with sha256 in Java?
...h some string with sha256 in Java? Does anybody know of any free library for this?
15 Answers
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What is the reason for having '//' in Python? [duplicate]
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In Python 3:
>>> 10/3
3.3333333333333335
>>> 10//3
3
For further reference, see PEP238.
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Getting LaTeX into R Plots
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Unfortunately, this doesn't have nearly the features of LaTeX.
– Myles Baker
Sep 11 '14 at 6:32
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How to make good reproducible pandas examples
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Note: The ideas here are pretty generic for Stack Overflow, indeed questions.
Disclaimer: Writing a good question is HARD.
The Good:
do include small* example DataFrame, either as runnable code:
In [1]: df = pd.DataFrame([[1, 2], [1, 3], [4, 6]], columns=['A',...
Difference between DirectCast() and CType() in VB.NET
...has just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well.
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“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]
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just a note for mac/linux users, just add an export statement to your ~/.profile (or similar file name). For example: export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=256m" ...and restart your shell. Worked for me.
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Python - Get path of root project structure
...e to the Project Root from a file that is in the top-level of the project. For example, if this is what your project structure looks like:
project/
configuration.conf
definitions.py
main.py
utils.py
In definitions.py you can define (this requires import os):
ROOT_DIR = os.path.di...
Get nth character of a string in Swift programming language
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Attention: Please see Leo Dabus' answer for a proper implementation for Swift 4 and Swift 5.
Swift 4 or later
The Substring type was introduced in Swift 4 to make substrings
faster and more efficient by sharing storage with the original string, so that's what the...
Accessing dict keys like an attribute?
...goes bananas with E1123(unexpected-keyword-arg) and E1103(maybe-no-member)
For the uninitiated it seems like pure magic.
A short explanation on how this works
All python objects internally store their attributes in a dictionary that is named __dict__.
There is no requirement that the internal dict...
How do I expand a tuple into variadic template function's arguments?
...he equivalent of func(arg1, arg2, arg3, ...)
Provided are 2 versions, one for a function called on an object and the other for a static function.
#include <tr1/tuple>
/**
* Object Function Tuple Argument Unpacking
*
* This recursive template unpacks the tuple parameters into
* variadic ...