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How to find the size of an array in postgresql
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As vyegorov mentioned, array_length will do the trick. Or if you know that the array is 1-dimen...
git error: failed to push some refs to remote
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How to sparsely checkout only one single file from a git repository?
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How to list commits since certain commit?
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git rev-list <since_hash>..HEAD
or to include the commit:
git rev-list <since_hash&g...
How do I remove all .pyc files from a project?
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find . -name "*.pyc" -exec rm -f {} \;
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Optimal number of threads per core
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If your threads don't do I/O, synchronization, etc., and there's nothing else running, 1 threa...
Pseudo-terminal will not be allocated because stdin is not a terminal
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Try ssh -t -t(or ssh -tt for short) to force pseudo-tty allocation even if stdin isn't a termina...
Remove substring from the string
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You can use the slice method:
a = "foobar"
a.slice! "foo"
=> "foo"
a
=> "bar"
there i...
How can I list ALL grants a user received?
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If you want more than just direct table grants (e.g., grants via roles, system privileges such a...