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Sleep until a specific time/date

...do the following: current_epoch=$(date +%s) target_epoch=$(date -d '01/01/2010 12:00' +%s) sleep_seconds=$(( $target_epoch - $current_epoch )) sleep $sleep_seconds To add precision down to nanoseconds (effectively more around milliseconds) use e.g. this syntax: current_epoch=$(date +%s.%N) tar...
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Changing the selected option of an HTML Select element

... 329 Vanilla JavaScript Using plain old JavaScript: var val = "Fish"; var sel = document.getE...
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Creating an empty Pandas DataFrame, then filling it?

..., index=index, columns=columns) In [11]: df Out[11]: A B C 2012-11-29 0 0 0 2012-11-30 1 1 1 2012-12-01 2 2 2 2012-12-02 3 3 3 2012-12-03 4 4 4 2012-12-04 5 5 5 2012-12-05 6 6 6 2012-12-06 7 7 7 2012-12-07 8 8 8 2012-12-08 9 9 9 ...
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What is the best way to get all the divisors of a number?

...ewgill 783k167167 gold badges10841084 silver badges12221222 bronze badges 2 ...
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Difference between a Seq and a List in Scala

... answered Jun 2 '12 at 23:48 Daniel C. SobralDaniel C. Sobral 280k8282 gold badges469469 silver badges666666 bronze badges ...
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Can you change what a symlink points to after it is created?

...ed by it: $ ln -s .bashrc test $ ls -al test lrwxrwxrwx 1 pascal pascal 7 2009-09-23 17:12 test -> .bashrc $ ln -s .profile test ln: creating symbolic link `test': File exists $ ln -s -f .profile test $ ls -al test lrwxrwxrwx 1 pascal pascal 8 2009-09-23 17:12 test -> .profile EDIT: As the ...
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How to do a FULL OUTER JOIN in MySQL?

...e SAMPLE transcribed from this SO question you have: with two tables t1, t2: SELECT * FROM t1 LEFT JOIN t2 ON t1.id = t2.id UNION SELECT * FROM t1 RIGHT JOIN t2 ON t1.id = t2.id The query above works for special cases where a FULL OUTER JOIN operation would not produce any duplicate rows. The ...
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How to do a logical OR operation in shell scripting

... | edited Apr 26 '18 at 10:40 JohannesM 21122 silver badges1212 bronze badges answered Nov 6...
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nodejs how to read keystrokes from stdin

... 62 You can achieve it this way, if you switch to raw mode: var stdin = process.openStdin(); requir...
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Gradient of n colors ranging from color 1 and color 2

I often work with ggplot2 that makes gradients nice ( click here for an example ). I have a need to work in base and I think scales can be used there to create color gradients as well but I'm severely off the mark on how. The basic goal is generate a palette of n colors that ranges from x colo...