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Bash tool to get nth line from a file
...tail will be slow for a huge file. I would suggest sed like this:
sed 'NUMq;d' file
Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Explanation:
NUMq will quit immediately when the line number is NUM.
d will delete the li...
Convert a Git folder to a submodule retrospectively?
...d after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is in its own folder.
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What is the best way to implement a “timer”? [duplicate]
...iseconds, specified by the Interval property on the Timer object. It will call the Event Handler method you specify. In the example above, it is OnTimedEvent.
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Length of string in bash
...h and byte length:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLcAll=$LC_ALL
LANG=C LC_ALL=C
bytlen=${#myvar}
LANG=$oLang LC_ALL=$oLcAll
printf "%s is %d char len, but %d bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Généralités is 11 char len, but 14 bytes len.
you could e...
How to get the position of a character in Python?
...ring.index('s')
2
>>> myString.index('x')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: substring not found
From the Python manual
string.find(s, sub[, start[, end]])
Return the lowest index in s where the substring sub is found s...
Merge, update, and pull Git branches without using checkouts
I work on a project that has 2 branches, A and B. I typically work on branch A, and merge stuff from branch B. For the merging, I would typically do:
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Don't display pushd/popd stack across several bash scripts (quiet pushd/popd)
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@xdevs23 || exit $? is equivalent to just || exit. Same for return.
– user4642212
Aug 23 at 17:51
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Is there a way to run Python on Android?
...nux, Windows, OS X, Android and iOS. You can run the same [python] code on all supported platforms.
Kivy Showcase app
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How to get past the login page with Wget?
...p
Make sure the --post-data parameter is properly percent-encoded (especially ampersands!) or the request will probably fail. Also make sure that user and password are the correct keys; you can find out the correct keys by sleuthing the HTML of the login page (look into your browser’s “inspect...
What's the difference between EscapeUriString and EscapeDataString?
...f I'm not escaping a whole URI but only part of it -- (i.e. the data for a query string parameter)? Am I escaping data for the URI, or does EscapeDataString imply something completely different?
– BrainSlugs83
Nov 10 '13 at 3:37
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