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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...
Pseudo-terminal will not be allocated because stdin is not a terminal
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532
Try ssh -t -t(or ssh -tt for short) to force pseudo-tty allocation even if stdin isn't a termina...
How to sparsely checkout only one single file from a git repository?
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Find files and tar them (with spaces)
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Use this:
find . -type f -print0 | tar -czvf backup.tar.gz --null -T -
It will:
deal with...
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...
git error: failed to push some refs to remote
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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...
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...
MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
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Python dict how to create key or append an element to key?
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Use dict.setdefault():
dic.setdefault(key,[]).append(value)
help(dict.setdefault):
set...