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how to exclude null values in array_agg like in string_agg using postgres?
...t(array_in) a
WHERE
a IS NOT NULL
;
'
LANGUAGE sql
;
Doing a pgbench test proved (with high confidence) that array_remove() is a little more than twice as fast. I did my test on double precision numbers with a variety of array sizes (10, 100 and 1000 elements) and random NULLs in between.
...
Python Requests throwing SSLError
...
$ pip install -U requests[security]
Tested on Python 2.7.6 @ Ubuntu 14.04.4 LTS
Tested on Python 2.7.5 @ MacOSX 10.9.5 (Mavericks)
When this question was opened (2012-05) the Requests version was 0.13.1. On version 2.4.1 (2014-09) the "security" extras were i...
JavaScript math, round to two decimal places [duplicate]
...stackoverflow.com/a/32605063/1726511 Which seems to work well with all the tests I've tried.
There is one minor modification required though, the function in the answer linked above returns whole numbers when it rounds to one, so for example 99.004 will return 99 instead of 99.00 which isn't ideal f...
AngularJS - Multiple ng-view in single template
...UI-Router is under active development. As such, while this library is well-tested, the API may change. Consider using it in production applications only if you're comfortable following a changelog and updating your usage accordingly.
– trainoasis
Feb 21 '14 at ...
Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
...error messages are different. Here's the one for IntMethod(GetString):
Test.cs(12,9): error CS1502: The best
overloaded method match for
'Program.IntMethod(int)' has some
invalid arguments
In other words, section 7.4.3.1 of the spec can't find any applicable function members.
No...
SQL join: selecting the last records in a one-to-many relationship
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This is an example of the greatest-n-per-group problem that has appeared regularly on StackOverflow.
Here's how I usually recommend solving it:
SELECT c.*, p1.*
FROM customer c
JOIN purchase p1 ON (c.id = p1.customer_id)
LEFT OUTER JOIN purchase p2 ON (...
Do spurious wakeups in Java actually happen?
...
I read the post and gave me an idea about having unit tests for testing one application's conformance to the looping-wait paradigm by waking it up randomly/deterministically. Or is it already available somewhere?
– akarnokd
Jun 26 '09 at 19...
Set up DNS based URL forwarding in Amazon Route53 [closed]
....com, instead of myaccount.signin.aws.amazon.com. If you click the link to test the Endpoint URL, AWS will happily redirect your browser to the wrong address!
After noticing your mistake, you will probably edit the <Hostname> in your Redirection Rules to fix the error. Unfortunately, when you...
iPhone app in landscape mode, 2008 systems
...the first time" has been resolved.
As of April 2011, it is not possible to test or even build anything below 4.0, so the question is purely a historic curiosity. It's incredible how much trouble it caused developers for so long!
Here is the original discussion and solution. This is utterly irrelev...
Mocking objects with Moq when constructor has parameters
...Moq with constructor arg specification. http://www.mockobjects.com/2007/04/test-smell-mocking-concrete-classes.html
The best thing to do would be right click on your class and choose Extract interface.
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