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Is it possible to reference one CSS rule within another?
For example if I have the following HTML:
7 Answers
7
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MySQL vs PostgreSQL for Web Applications [closed]
... you go choosing a DBMS based on the advice below, do some research to see if it's still accurate.
Check for newer answers below.
Better?
MySQL is much more commonly provided by web hosts.
PostgreSQL is a much more mature product.
There's this discussion addressing your "better" question
App...
How to determine whether a substring is in a different string
...learning JS after learning Python, for this you would need to add loads of if else statements and other things. So, I just wanted to remind myself of how its done in Python, this answer made me say to myself 'Of course!', I mean things like this in Python are just so trivial you never give them much...
Difference between return and exit in Bash functions
What is the difference between the return and exit statement in Bash functions with respect to exit codes?
10 Answers
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Media Player called in state 0, error (-38,0)
...
What if we don't want it to start right away? Even if I initialize my player and wait a minute or so, the first time i try to play it, it has this error unless I call .start() in onPrepared
– Elliptica
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Is there a performance impact when calling ToList()?
...py of the array (more generally IEnumerable<T>), otherwise future modifications of the original array will change on the source T[] also which wouldn't be desirable generally.
I would like to reiterate this will only make a difference with a huge list, copying chunks of memory is quite a fas...
Deleting all files in a directory with Python
...stdir and os.remove:
import os
filelist = [ f for f in os.listdir(mydir) if f.endswith(".bak") ]
for f in filelist:
os.remove(os.path.join(mydir, f))
Or via glob.glob:
import glob, os, os.path
filelist = glob.glob(os.path.join(mydir, "*.bak"))
for f in filelist:
os.remove(f)
Be sure ...
How to list running screen sessions?
...ng command as that user:
screen -ls
To see all screen sessions on a specific machine you can do:
ls -laR /var/run/screen/
I get this on my machine:
gentle ~ # ls -laR /var/run/screen/
/var/run/screen/:
total 1
drwxrwxr-x 4 root utmp 96 Mar 1 2005 .
drwxr-xr-x 10 root root 840 Feb 1 03...
How to replace list item in best way
...newValue = value.ToString();
int index = listofelements.IndexOf(oldValue);
if(index != -1)
listofelements[index] = newValue;
This asks only once for the index. Your approach uses Contains first which needs to loop all items(in the worst case), then you're using IndexOf which needs to enumerate...
Parsing boolean values with argparse
...s, but with the "correct" parse error from argparse:
def str2bool(v):
if isinstance(v, bool):
return v
if v.lower() in ('yes', 'true', 't', 'y', '1'):
return True
elif v.lower() in ('no', 'false', 'f', 'n', '0'):
return False
else:
raise argparse.Argum...