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Django dynamic model fields
...tively attach/detach dynamic attribute storage to Django model with simple commands like:
eav.unregister(Encounter)
eav.register(Patient)
Nicely integrates with Django admin;
At the same time being really powerful.
Downsides:
Not very efficient. This is more of a criticism of the EAV pattern ...
“Diff” an image using ImageMagick
...ne has written on an exact duplicate of the original image. Now, I need to compare the original to the written on image and extract just the writing in image format.
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How do I get the MIN() of two fields in Postgres?
...of any number of expressions. The expressions must all be convertible to a common data type, which will be the type of the result (see Section 10.5 for details). NULL values in the list are ignored. The result will be NULL only if all the expressions evaluate to NULL.
Note that GREATEST and LEA...
Real-world applications of zygohistomorphic prepromorphisms
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Is there a way to use two CSS3 box shadows on one element?
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You can comma-separate shadows:
box-shadow: inset 0 2px 0px #dcffa6, 0 2px 5px #000;
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Center a 'div' in the middle of the screen, even when the page is scrolled up or down?
...olution (but a perfect solution for the problem above). Check getbootstrap.com/javascript/#modals and look with your DevTools to get some nice ideas about working with your popups/modals.
– Cas Bloem
Jun 13 '14 at 9:02
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Why use Ruby's attr_accessor, attr_reader and attr_writer?
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You may use the different accessors to communicate your intent to someone reading your code, and make it easier to write classes which will work correctly no matter how their public API is called.
class Person
attr_accessor :age
...
end
Here, I can see that...
Select second last element with css
...E. Jquery is a much better option if you are concerned about cross-browser computability.
– Thomas
Mar 24 '11 at 12:11
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Updating version numbers of modules in a multi-module Maven project
...you made a mistake, do
mvn versions:revert
afterwards, or
mvn versions:commit
if you're happy with the results.
Note: this solution assumes that all modules use the aggregate pom as parent pom also, a scenario that was considered standard at the time of this answer. If that is not the case,...
how to view the contents of a .pem certificate
...ave exported a self-signed .pem certificate from my keystore. Is there a command to view the certificate details directly from the .pem file (not of the certificate in the keystore)?
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