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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...
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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How to optimize for-comprehensions and loops in Scala?
...) with Range constants in the outermost scope. Or better, intern them like Strings literals in Java.
footnote:
Arrays were about the same as Range, but interestingly, pimping a new forall method (shown below) resulted in 24% faster execution on 64-bit, and 8% faster on 32-bit. When I reduced the...
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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How to implement common bash idioms in Python? [closed]
... manipulation
tool similar to awk or sed, but which uses standard python string and
list methods as well as custom functions evolved to generate fast
results in an intense production environment.
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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...
Is there a way to use two CSS3 box shadows on one element?
... is an inner lighter box shadow (2px), and the second is a drop shadow outside the button (5px) itself.
2 Answers
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iTerm2 keyboard shortcut - split pane navigation
I have been a long time user of the standard Mac Terminal. Decided to experiment with iTerm2 after hearing good things about it from my colleagues.
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how to view the contents of a .pem certificate
...09 -in certificate.pem -text
This should work for any x509 .pem file provided you have openssl installed.
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