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Django ManyToMany filter()
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another way to do this is by going through the intermediate table. I'd express this within the Django ORM like this:
UserZone = User.zones.through
# for a single zone
users_in_zone = User.objects.filter(
id__in=UserZone.objects.filter(zone=zone1).values('user'))
# for multiple zo...
Detect if an input has text in it using CSS — on a page I am visiting and do not control?
...r spec
The Mozilla/Firefox supported selectors
Cross-browser, CSS3 support table
The :empty selector refers only to child nodes, not input values.
[value=""] does work; but only for the initial state. This is because a node's value attribute (that CSS sees), is not the same as the node's value pr...
MySQL - ORDER BY values within IN()
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SELECT id, name
FROM mytable
WHERE name IN ('B', 'A', 'D', 'E', 'C')
ORDER BY FIELD(name, 'B', 'A', 'D', 'E', 'C')
The FIELD function returns the position of the first string in the remaining list of strings.
However, it is much better performan...
What is the relative performance difference of if/else versus switch statement in Java?
...ere are more than two if/else blocks glued together or its size is unpredictable, then you may highly consider a switch statement.
Alternatively, you can also grab Polymorphism. First create some interface:
public interface Action {
void execute(String input);
}
And get hold of all implemen...
What does the [Flags] Enum Attribute mean in C#?
...ean, I prefer to have the full int in source code. If I have a column on a table in the database called MyEnum that stores a value of one of the enums, and a record has 131,072, I would need to get out my calculator to figure out that that corresponds to the enum with the value 1<<17. As oppos...
Webview load html from assets directory
... On a side note, is the white on black a standard look in Android? All my table views are white on black by default, but my html is set for black on white... I can change them, but not sure which one to change.
– AndyD273
Jun 30 '10 at 19:06
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printf with std::string?
...has a place that can't easily be filled by C++ syntactic features, just as table structures in html have a place that can't easily be filled by divs. As Dykstra wrote later about the goto, he didn't intend to start a religion and was really only arguing against using it as a kludge to make up for p...
Is it possible to have multiple styles inside a TextView?
... Usually "false" implies that you accessed a weird value on the lookup table. I got this when I had R.id.ok and R.string.ok, and accidentally used getString(R.id.ok) instead of the correct getString(R.string.ok)
– Joe Plante
Oct 11 '12 at 13:26
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Haskell error parse error on input `='
...You don't explain polynomial products to a kid learning the multiplication table -- it doesn't show how much you know, it shows you don't know how to share what you do know.
– btk
Jan 27 '13 at 19:09
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Change the mouse cursor on mouse over to anchor-like style
...s) this answer applies broadly. It is useful for any HTML element such as tables, <p>'s, buttons, etc. That's why I +1'd it.
– PeteH
Nov 19 '13 at 6:32
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