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How to find the size of an array in postgresql
...in a single or multidimensional array. So select cardinality(ARRAY[[1,2], [3,4]]); would return 4, whereas select array_length(ARRAY[[1,2], [3,4]], 1) would return 2. If you're counting the first dimension, array_length is a safer bet.
– Roshambo
Sep 20 '17 at ...
How do you clear a stringstream variable?
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edited Sep 3 '15 at 20:31
BartoszKP
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How to add a delay for a 2 or 3 seconds [closed]
...AlldigEmAll
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13
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Rebasing a Git merge commit
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135
There are two options here.
One is to do an interactive rebase and edit the merge commit, redo ...
break out of if and foreach
...how many loop structures it should break. Example:
foreach (array('1','2','3') as $a) {
echo "$a ";
foreach (array('3','2','1') as $b) {
echo "$b ";
if ($a == $b) {
break 2; // this will break both foreach loops
}
}
echo ". "; // never reached!
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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
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1003
I would recommend using INSERT...ON DUPLICATE KEY UPDATE.
If you use INSERT IGNORE, then the ro...
Why does one hot encoding improve machine learning performance?
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3 Answers
3
Active
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What characters are valid for JavaScript variable names?
... in a single ASCII-only regular expression for JavaScript, it would be 11,236 characters long. Here it is:
// ES5.1 / Unicode 6.1
/^(?!(?:do|if|in|for|let|new|try|var|case|else|enum|eval|false|null|this|true|void|with|break|catch|class|const|super|throw|while|yield|delete|export|import|public|retur...
How to implement an ordered, default dict? [duplicate]
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edited Aug 23 '14 at 20:47
Martin Thoma
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