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Why does this code segfault on 64-bit architecture but work fine on 32-bit?
...has an entry discussing why casting the return from malloc is never needed and potentially bad.
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Grepping a huge file (80GB) any way to speed it up?
...
Here are a few options:
1) Prefix your grep command with LC_ALL=C to use the C locale instead of UTF-8.
2) Use fgrep because you're searching for a fixed string, not a regular expression.
3) Remove the -i option, if you don't need it.
So your command becomes:
LC_ALL=C ...
Unique combination of all elements from two (or more) vectors
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this maybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11...
Get class name of django model
...rst()
# Get the model name
book._meta.verbose_name
Setting verbose_name and verbose_name_plural is optional. Django will infer these values from the name of the model class (you may have noticed the use of those values in the admin site).
https://docs.djangoproject.com/en/3.0/ref/models/options/...
Pip freeze vs. pip list
...ments.txt
The packages need to be in a specific format for pip to understand, which is
feedparser==5.1.3
wsgiref==0.1.2
django==1.4.2
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That is the "requirements format".
Here, django==1.4.2 implies install django version 1.4.2 (even though the latest is 1.6.x).
If you do not specify ==1.4....
Argparse optional positional arguments?
...arguments:
dir
optional arguments:
-h, --help show this help message and exit
-v
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What are the risks of running 'sudo pip'?
... from the Internet as root. If someone puts up a malicious project on PyPI and you install it, you give an attacker root access to your machine. Prior to some recent fixes to pip and PyPI, an attacker could also run a man in the middle attack to inject their code when you download a trustworthy proj...
Joda-Time: what's the difference between Period, Interval and Duration?
... are defined e.g. this might be the interval between 20:00:00GMT yesterday and 09:00:00GMT this morning.
A duration in Joda-Time represents a duration of time measured in milliseconds. The duration is often obtained from an interval. i.e. we can subtract start from end of an interval to derive a du...
How do I break out of a loop in Perl?
... edited Jan 5 '18 at 17:41
Alexander Roskamp
2766 bronze badges
answered Nov 19 '08 at 20:23
Zain RizviZain R...
Multiple commands in gdb separated by some sort of delimiter ';'?
I am trying to execute two commands at once in gdb:
6 Answers
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