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Django - filtering on foreign key properties
I'm trying to filter a table in Django based on the value of a particular field of a ForeignKey .
3 Answers
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Fastest way to check if string contains only digits
...
Here's some benchmarks based on 1000000 parses of the same string:
Updated for release stats:
IsDigitsOnly: 384588
TryParse: 639583
Regex: 1329571
Here's the code, looks like IsDigitsOnly is faster:
class Program
{
private stati...
What's the best way to set a single pixel in an HTML5 canvas?
...ng drawImage() to show it:
var img = new Image;
img.src = "data:image/png;base64," + myPNGEncoder(r,g,b,a);
// Writing the PNGEncoder is left as an exercise for the reader
creating another img or canvas filled with all the pixels you want and use drawImage() to blit just the pixel you want across....
Should I implement __ne__ in terms of __eq__ in Python?
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Python, should I implement __ne__() operator based on __eq__?
Short Answer: Don't implement it, but if you must, use ==, not __eq__
In Python 3, != is the negation of == by default, so you are not even required to write a __ne__, and the documentation is no longer op...
Practical uses for the “internal” keyword in C#
...SDN (via archive.org):
A common use of internal access is in component-based development because it enables a group of components to cooperate in a private manner without being exposed to the rest of the application code. For example, a framework for building graphical user interfaces could prov...
Difference between hard wrap and soft wrap?
...nd, soft wrapping is annoying because most all command line tools use line-based diff-ing (version control is where this becomes most noticeable to me). If you've got a 1/3-page paragraph that's soft wrapped and fix a typo, it's basically impossible to see where the change is in a regular diff outpu...
Getting the location from an IP address [duplicate]
...lient-side scripting, PHP for server-side scripting, and MySQL for the database.
23 Answers
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How would I extract a single file (or changes to a file) from a git stash?
...directory like git stash apply would. (So if you have any changes from the base the stash was created on, they'll be lost).
– peterflynn
Apr 5 '13 at 22:04
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Performing a Stress Test on Web Application?
...ng a number of different server types (for example, web, web services, database, just about anything that uses requests basically).
It does however have a steep learning curve once you start getting to complicated tests, but it's well worth it. You can get up and running very quickly, and depending...
Unpivot with column name
...le expression can be fully avoided if there are strictly no null values in base table)
select *
from
(
select name, subject,
case subject
when 'Maths' then maths
when 'Science' then science
when 'English' then english
end as Marks
from studentmarks
Cross Join (values('Ma...