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How to concatenate strings of a string field in a PostgreSQL 'group by' query?
...in any aggregate expression; otherwise, the order is undefined. So you can now write:
SELECT company_id, string_agg(employee, ', ' ORDER BY employee)
FROM mytable
GROUP BY company_id;
Or indeed:
SELECT string_agg(actor_name, ', ' ORDER BY first_appearance)
PostgreSQL 8.4 or later:
PostgreSQL ...
Validating with an XML schema in Python
... result = self.xmlschema.validate(xml_doc)
return result
Now we can validate all files in the directory as follows:
main.py
import os
from validator import Validator
validator = Validator("path/to/scheme.xsd")
# The directory with XML files
XML_DIR = "path/to/directory"
for fi...
UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
...ssue for me. Regarding the above: "sys.stdout.encoding" probably does not know your terminal encoding, but only the system-wide encoding. If this is not equal to the terminal, then only parsing some environment variables may help. But that wont work always, as a terminal must not tell the other side...
Android Fragment lifecycle over orientation changes
...nstead of findFragmentById) to get references to them - this way you will know the class of each fragment and be able to cast correctly
– k29
Oct 14 '17 at 23:24
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How to get an absolute file path in Python
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They did now for Python 3.4: pathlib. See my answer in this thread.
– twasbrillig
Oct 24 '14 at 1:20
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Setting the zoom level for a MKMapView
I have a map which shows correctly, the only thing I want to do now is set the zoom level when it loads. Is there a way to do this?
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Reading a resource file from within jar
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Up until now (December 2017), this is the only solution I found which works both inside and outside the IDE.
Use PathMatchingResourcePatternResolver
Note: it works also in spring-boot
In this example I'm reading some files located ...
What is the difference between :focus and :active?
...h. It just exists. If we use Tab to give "focus" to the <button>, it now enters its :focus state. If you then click (or press space), you then make the button enter its (:active) state.
On that note, when you click on an element, you give it focus, which also cultivates the illusion that :foc...
Skip callbacks on Factory Girl and Rspec
...:user_without_callbacks) should create the user without the callbacks. I know this is just a "design" modification, but I think this can avoid to break pre existing code, and be more consistent.
– Gnagno
Jun 20 '13 at 16:21
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Download a specific tag with Git
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This does (at least now) work for tags, though you end up in a detached HEAD state.
– mxcl
Jun 24 '13 at 23:31
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