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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-dimensional (which is likely) and are running PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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What's the actual use of 'fail' in JUnit test case?
... @Test(expected=IndexOutOfBoundsException.class)
However, this won't work if you also want to inspect the exception, then you still need fail().
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See “real” commit date in github (hour/day)
...der, is there a git command you can enter that'll display this information if you pass in the commit hash?
– CF_HoneyBadger
Mar 23 '15 at 16:41
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How can I pass an argument to a PowerShell script?
...tement in your script
$iTunes = New-Object -ComObject iTunes.Application
if ($iTunes.playerstate -eq 1)
{
$iTunes.PlayerPosition = $iTunes.PlayerPosition + $step
}
Call it with
powershell.exe -file itunesForward.ps1 -step 15
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MVC4 DataType.Date EditorFor won't display date value in Chrome, fine in Internet Explorer
...ay the date, the value must be formatted as 2012-09-28. Quote from the specification:
value: A valid full-date as defined in [RFC 3339], with the additional
qualification that the year component is four or more digits
representing a number greater than 0.
You could enforce this format usin...
How do I specify new lines on Python, when writing on files?
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It depends on how correct you want to be. \n will usually do the job. If you really want to get it right, you look up the newline character in the os package. (It's actually called linesep.)
Note: when writing to files using the Python API, do not use the os.linesep. Just use \n; Python automa...
How to open files relative to home directory
The following fails with Errno::ENOENT: No such file or directory , even if the file exists:
4 Answers
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Argparse: Way to include default values in '--help'?
... Note that in that case no attribute will be added to the namespace result if that argument was omitted, see the default documentation.
– Martijn Pieters♦
Jun 7 '13 at 10:18
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How to include file in a bash shell script
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entries in $PATH are used to find the directory containing FILENAME.
If any ARGUMENTS are supplied, they become the positional parameters
when FILENAME is executed.
Exit Status:
Returns the status of the last command executed in FILENAME; fails if
FILENAME cannot be read.
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postgresql: INSERT INTO … (SELECT * …)
I'm not sure if its standard SQL:
6 Answers
6
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