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What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...8.4.1[dcl.fct.def.general]/8), which is not quite as useful as the specification in C. (The original proposal to add __func__ to C++ was N1642).
__FUNCTION__ is a pre-standard extension that some C compilers support (including gcc and Visual C++); in general, you should use __func__ where it is supp...
Is gcc 4.8 or earlier buggy about regular expressions?
...d is the GCC major version
Testing
You can test it with GCC like this:
cat << EOF | g++ --std=c++11 -x c++ - && ./a.out
#include <regex>
#if __cplusplus >= 201103L && \
(!defined(__GLIBCXX__) || (__cplusplus >= 201402L) || \
...
How do I daemonize an arbitrary script in unix?
... "Checking pid in file $PIDFILE."
#Check to see if process running.
PID=$(cat $PIDFILE 2>/dev/null)
if [[ $? = 0 ]]; then
ps -p $PID >/dev/null 2>&1
if [[ $? = 0 ]]; then
echo "Command $1 already running."
exit
fi
fi
# Write our pid to file.
echo $$ >$PI...
What exactly are iterator, iterable, and iteration?
... that method on the object passed to it.
For example:
>>> s = 'cat' # s is an ITERABLE
# s is a str object that is immutable
# s has no state
# s has a __getitem__() method
>>> t = iter(s) # t is an ITERATOR
...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
...sum
$ uname -mov
#1 SMP Mon May 13 12:16:08 EDT 2019 ppc64le GNU/Linux
$ cat /proc/cpuinfo
processor : 0
cpu : POWER9, altivec supported
clock : 2166.000000MHz
revision : 2.2 (pvr 004e 1202)
$ ls -l linux-master.tar
-rw-rw-r-- 1 x x 829685760 Jan 29 14:30 linux-...
Why is require_once so bad to use?
...
I'm fairly sure you're right Bobby but I'm not advocating the defines over _once. It's just an option. The time it would take to interpret the code might even make it marginally slower but, that said, I don't know how thorough the internal method is. It might do extra work to...
What is the (best) way to manage permissions for Docker shared volumes?
...body belongs to a group with a group id equal to TARGET_GID
EXISTS=$(cat /etc/group | grep $TARGET_GID | wc -l)
# Create new group using target GID and add nobody user
if [ $EXISTS == "0" ]; then
groupadd -g $TARGET_GID tempgroup
usermod -a -G tempgroup nobody
else
# GID exi...
How to implement a rule engine?
... fast executable code (using Expression trees) and does not need any complicated switch statements:
(Edit : full working example with generic method)
public Func<User, bool> CompileRule(Rule r)
{
var paramUser = Expression.Parameter(typeof(User));
Expression expr = BuildExpr(r, paramUs...
Evenly distributing n points on a sphere
...Alternatively, building on the other answer here (and using Python):
> cat ll.py
from math import asin
nx = 4; ny = 5
for x in range(nx):
lon = 360 * ((x+0.5) / nx)
for y in range(ny):
midpt = (y+0.5) / ny ...
When should I use OWIN Katana?
... OWIN.
Without OWIN, the asp.net bits are coupled to the way IIS communicates with the application. OWIN abstracts web servers and framework components. That means that your application code will now be aware of the OWIN interface, but not of the webserver that is serving the request.
In return,...