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How to check if a process id (PID) exists
...s -p $PID > /dev/null
then
echo "$PID is running"
# Do something knowing the pid exists, i.e. the process with $PID is running
fi
The problem with:
kill -0 $PID
is the exit code will be non-zero even if the pid is running and you dont have permission to kill it. For example:
kill -0 1...
How should I validate an e-mail address?
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I know this answer is about two years old, but when I try this regex using regexr.com, it validates user@gmail.com.nospam, and even longer tlds like .museum. Am I missing something? I don't want to block any of my users by faili...
Is there a case insensitive jQuery :contains selector?
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Just wanted to let folks know that the solution as described by @Pat and others for jQuery 1.3 also works for 1.4.3.
– Jim Ade
Nov 3 '10 at 17:54
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NSNotificationCenter addObserver in Swift
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Thanks! I didn't know how to pass the selector name in Swift.
– Berry Blue
Jun 4 '14 at 23:30
14
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.NET / C# - Convert char[] to string
...r just above is my 2nd high-est voted answer on the site. In fact I'm here now because someone just voted it again, almost 10 years later. And the two answers aren't really any different... but mine was posted 17 seconds faster, and that's meant a 500 vote difference :/
– Joel ...
Scanner vs. StringTokenizer vs. String.Split
I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer and String.Split. I know that the StringTokenizer and String.Split only work on Strings, so why would I want to use the Scanner for a String? Is Scanner just intended to be one-stop-shop...
Does Git publicly expose my e-mail address?
...ere in the repo except on the PR web page). If the PR was merged, I don't know any way to reverse the commits (if it is still open you can rebase and force push).
– D. A.
Mar 22 at 17:44
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How do I check if the Java JDK is installed on Mac?
...ary/Java/JavaVirtualMachines/
Then run ls command in the terminal again. Now you can see the jdk version & package if exists in your computer.
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A weighted version of random.choice
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Now you got choices method in the random module
– Jitin
Jul 21 at 8:33
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How to do scanf for single char in C [duplicate]
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Now that's wild! Would you explain why the space in front of %c makes a difference?
– Max Coplan
Sep 10 '19 at 15:59
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