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Removing “NUL” characters
...ty102.blogspot.ru/2010/04/findreplace-of-nul-objects-in-notepad.html
Basically you need to replace \x00 characters with regular expressions
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How to change the name of a Django app?
...e changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes). But now I get this error when I try to run python manage.py runserver
...
What are the differences between Autotools, Cmake and Scons?
...
In truth, Autotools' only real 'saving grace' is that it is what all the GNU projects are largely using.
Issues with Autotools:
Truly ARCANE m4 macro syntax combined with verbose, twisted shell scripting for tests for "compatibility", etc.
If you're not paying attention, you will mess u...
What is the difference between a pseudo-class and a pseudo-element in CSS?
...nsists of a "colon" (:) followed by the name of the pseudo-class and optionally by a value between parentheses.
Pseudo-classes are allowed in all sequences of simple selectors contained in a selector. Pseudo-classes are allowed anywhere in sequences of simple selectors, after the leading type s...
Omit rows containing specific column of NA
...# 2 2 10 33
EDIT: Only return rows with no NAs
If you want to eliminate all rows with at least one NA in any column, just use the complete.cases function straight up:
DF[complete.cases(DF), ]
# x y z
# 2 2 10 33
Or if completeFun is already ingrained in your workflow ;)
completeFun(DF, na...
Algorithm for creating a school timetable
...ere are known solutions for algorithm of creating a school timetable. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teachers associated with each ot...
GetHashCode Guidelines in C#
...ot GetHashCode right at every implementation. Second, value types are generally immutable with every value being a new instance rather than a modification of an existing instance.
– Jeff Yates
Jan 20 '09 at 18:46
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What is the difference between a URI, a URL and a URN?
...tion"). The term "Uniform Resource Name"
(URN) has been used historically to refer to both URIs under the
"urn" scheme [RFC2141], which are required to remain globally unique
and persistent even when the resource ceases to exist or becomes
unavailable, and to any other URI with ...
How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
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wait also (optionally) takes the PID of the process to wait for, and with $! you get the PID of the last command launched in background.
Modify the loop to store the PID of each spawned sub-process into an array, and then loop again waiting o...
What's the difference between a proxy server and a reverse proxy server? [closed]
...ccurate, but perhaps too terse.
I will try to add some examples.
First of all, the word "proxy" describes someone or something acting on behalf of someone else.
In the computer realm, we are talking about one server acting on the behalf of another computer.
For the purposes of accessibility, I wi...