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Find difference between timestamps in seconds in PostgreSQL
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How do I kill background processes / jobs when my shell script exits?
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To clean up some mess, trap can be used. It can provide a list of stuff executed when a specific signal arrives:
trap "echo hello" SIGINT
but can also be used to execute something if the shell exits:
trap "killall background" EXIT
It's a builtin, so help trap will give y...
How to track child process using strace?
...ld use the -ff option with -o filename to produce multiple files (one per pid).
eg:
strace -o process_dump -ff ./executable
grep clone process_dump*
that would help you see which parent created what. Maybe that would help you - at least then you could search backwards.
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Nginx location priority
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Scala: what is the best way to append an element to an Array?
...el Yes, I've just have a small memory hole when I wrote the comment and I didn't find the obvious word "sequence"
– Nicolas
Sep 21 '11 at 14:37
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Will docker container auto sync time with the host machine?
...mezone of docker container correctly. Do I need to install a NTP server inside the docker container to periodically sync the time or the container will sync the time from its host machine?
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JavaScript for…in vs for
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The choice should be based on the which idiom is best understood.
An array is iterated using:
for (var i = 0; i < a.length; i++)
//do stuff with a[i]
An object being used as an associative array is iterated using:
for (var key in o)
//do stuff with o[k...
Escape angle brackets in a Windows command prompt
...to use a character that was unlikely to appear in normal text, so that it didn't cause easily avoidable, but unwanted, character escapes.
– David A. Gray
Nov 14 '17 at 9:05
ad...
How do I get the MIN() of two fields in Postgres?
... edited Feb 3 '11 at 5:26
David Underhill
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answered Nov 25 '08 at 22:17
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NSLog the method name with Objective-C in iPhone
...o my logging statements?
To assist with logging:
The C preprocessor provides a few macros.
Objective-C provides expressions (methods).
Pass the implicit argument for the current method's selector: _cmd
As other answers indicated, to merely get the current method's name, call:
NSStringFromS...