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What is __pycache__?
...s sharing the names of the .py files in your project's folder, only their extensions will be either .pyc or .pyo. These are bytecode-compiled and optimized bytecode-compiled versions of your program's files, respectively.
As a programmer, you can largely just ignore it... All it does is make your pr...
How to compare times in Python?
...an't compare a specific point in time (such as "right now") against an unfixed, recurring event (8am happens every day).
You can check if now is before or after today's 8am:
>>> import datetime
>>> now = datetime.datetime.now()
>>> today8am = now.replace(hour=8, minute=0...
How to prevent SIGPIPEs (or handle them properly)
... have a small server program that accepts connections on a TCP or local UNIX socket, reads a simple command and, depending on the command, sends a reply. The problem is that the client may have no interest in the answer sometimes and exits early, so writing to that socket will cause a SIGPIPE and ma...
When do I use the PHP constant “PHP_EOL”?
...newline character in a cross-platform-compatible way, so it handles DOS/Unix issues.
Note that PHP_EOL represents the endline character for the current system. For instance, it will not find a Windows endline when executed on a unix-like system.
...
Network usage top/htop on Linux
Is there a htop/top on Linux where I get to sort processes by network usage?
6 Answers
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Test if characters are in a string
I'm trying to determine if a string is a subset of another string. For example:
9 Answers
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Asynchronous Process inside a javascript for loop [duplicate]
...me time in the future and call their callbacks, the value of your loop index variable i will be at its last value for all the callbacks.
This is because the for loop does not wait for an asynchronous operation to complete before continuing on to the next iteration of the loop and because the asyn...
Linux: copy and create destination dir if it does not exist
...ly an option to cp) that creates the destination directory if it does not exist.
21 Answers
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What is a segmentation fault?
... results in a segfault
Dangling pointer points to a thing that does not exist any more, like here:
char *p = NULL;
{
char c;
p = &c;
}
// Now p is dangling
The pointer p dangles because it points to character variable c that ceased to exist after the block ended. And when you try to...
What is __init__.py for?
...and namespace packages. Regular packages are traditional packages as they existed in Python 3.2 and earlier. A regular package is typically implemented as a directory containing an __init__.py file. When a regular package is imported, this __init__.py file is implicitly executed, and the objects it ...