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How can I check if a program exists from a Bash script?
...y do what you want, while the effects of external commands can easily vary from system to system.
Why care?
Many operating systems have a which that doesn't even set an exit status, meaning the if which foo won't even work there and will always report that foo exists, even if it doesn't (note that ...
Insert spaces between words on a camel-cased token [duplicate]
... This one actually works: (?<!^)([A-Z][a-z]|(?<=[a-z])[A-Z]) From: codeproject.com/Articles/108996/…
– Vincent
Jan 31 '19 at 19:04
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Update Git branches from master
...for b2 and b3
This leaves the history exactly as it happened: You forked from master, you made changes to all branches, and finally you incorporated the changes from master into all three branches.
git can handle this situation really well, it is designed for merges happening in all directions, a...
How is std::function implemented?
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The implementation of std::function can differ from one implementation to another, but the core idea is that it uses type-erasure. While there are multiple ways of doing it, you can imagine a trivial (not optimal) solution could be like this (simplified for the specific c...
What does “connection reset by peer” mean?
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@Robert Because that's where the reset came from. The peer sent an RST packet.
– Marquis of Lorne
Dec 17 '14 at 22:44
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How to save a git commit message from windows cmd?
I run git from the command line.
6 Answers
6
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Using %f with strftime() in Python to get microseconds
...strftime accepts a timetuple that does not carry microsecond information.
from datetime import datetime
datetime.now().strftime("%H:%M:%S.%f")
Should do the trick!
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Vagrant reverse port forwarding?
...ide the guest machine, and the last two are the service address as visible from the host machine.
– Eero
May 13 '13 at 12:33
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What is an intuitive explanation of the Expectation Maximization technique? [closed]
...behind this answer can be found here.
Suppose we have some data sampled from two different groups, red and blue:
Here, we can see which data point belongs to the red or blue group. This makes it easy to find the parameters that characterise each group. For example, the mean of the red group is...
Install Application programmatically on Android
...if it is possible to programmatically install a dynamically downloaded apk from a custom Android application.
16 Answers
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