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How to raise a ValueError?
...pecific character in a string, however I would like it to raise a ValueError when the specified character does not occur in a string.
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What is the difference between Trap and Interrupt?
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A trap is an exception in a user process. It's caused by division by zero or invalid memory access. It's also the usual way to invoke a kernel routine (a system call) because those run with a higher priority than user code. Handling is synchronous (so the user code is suspended and continues afterw...
What do numbers using 0x notation mean?
...rs. (base 16)
The number 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 * 16^3 + 11 * 16^2 + 15 * 16^1 = 27632
24576 + 2816 + 240 = 27632
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Automatically import modules when entering the python or ipython interpreter
I find myself typing import numpy as np almost every single time I fire up the python interpreter. How do I set up the python or ipython interpreter so that numpy is automatically imported?
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Sort objects in ArrayList by date?
...ample I find is about doing this alphabetically, while I need my elements sorted by date.
13 Answers
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What is base 64 encoding used for?
... people talking about "base 64 encoding" here and there. What is it used for?
18 Answers
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How to stop mongo DB in one command
...ngoDB through the shell, cli, drivers etc. It also details the risks of incorrectly stopping MongoDB (such as data corruption) and talks about the different kill signals.
Additionally, if you have installed MongoDB using a package manager for Ubuntu or Debian then you can stop mongodb (currently mo...
Check if something is (not) in a list in Python
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The bug is probably somewhere else in your code, because it should work fine:
>>> 3 not in [2, 3, 4]
False
>>> 3 not in [4, 5, 6]
True
Or with tuples:
>>> (2, 3) not in [(2, 3), (5, 6), (9, 1)]
False
>>> (2, 3) not in [(2, 7), (7, 3), "hi"]
True
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Should I compile release builds with debug info as “full” or “pdb-only”?
In Visual Studio 2010 for a C# project, if you go to Project Properties > Build > Advanced > Debug Info you have three options: none, full, or pdb-only. Based on the answer to this question , I believe I understand some of the differences between full and pdb-only. However, which is more appropri...
How to sort strings in JavaScript
I have a list of objects I wish to sort based on a field attr of type string. I tried using -
11 Answers
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