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How to limit the maximum value of a numeric field in a Django model?
...t the validation in a form. The question of which range of numbers is acceptable is as much a part of the model as is the question of which kind of number is acceptable. I don't want to have to tell every form through which the model is editable, just which range of numbers to accept. This would vi...
The order of elements in Dictionary
...ry is non-deterministic. The notion of order simply is not defined for hashtables. So don't rely on enumerating in the same order as elements were added to the dictionary. That's not guaranteed.
Quote from the doc:
For purposes of enumeration, each item in the dictionary is treated as a KeyValu...
How do I detect when someone shakes an iPhone?
...sign of first responder management in this code. I've only tried this with Table View Controllers so far and everything seems to work quite nicely together! I can't vouch for other scenarios though.
Kendall, et. al - can anyone speak to why this might be so for UIWindow subclasses? Is it because th...
How can I test a Windows DLL file to determine if it is 32 bit or 64 bit? [duplicate]
...
Gory details
A DLL uses the PE executable format, and it's not too tricky to read that information out of the file.
See this MSDN article on the PE File Format for an overview. You need to read the MS-DOS header, then read the IMAGE_NT_HEADERS structure. This ...
How to place and center text in an SVG rectangle
...d see if that will do it. (If only I could get the browsers to display the table correctly.)
– Lady Aleena
Apr 5 '11 at 6:44
...
Entity Framework - Start Over - Undo/Rollback All Migrations
...rations by using the second or third command, then delete MigrationHistory table and all migration related code. It should get you to starting position. You can also get starting database from backup (before using migrations) and delete all migration related code.
– Ladislav Mr...
Get local IP address
...xistence of the route to the destination according to the system's routing table and setting the local endpoint accordingly. The last part seems to be undocumented officially but it looks like an integral trait of Berkeley sockets API (a side effect of UDP "connected" state) that works reliably in b...
What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
... (or "breakpoints")...
Extra small (for smartphones .col-xs-*)
Small (for tablets .col-sm-*)
Medium (for laptops .col-md-*)
Large (for laptops/desktops .col-lg-*).
These grid sizes enable you to control grid behavior on different widths. The different tiers are controlled by CSS media queries.
So ...
How can I safely encode a string in Java to use as a filename?
...ot something to copy and paste.)
char fileSep = '/'; // ... or do this portably.
char escape = '%'; // ... or some other legal char.
String s = ...
int len = s.length();
StringBuilder sb = new StringBuilder(len);
for (int i = 0; i < len; i++) {
char ch = s.charAt(i);
if (ch < ' ' || c...
How to show Page Loading div until the page has finished loading?
...load). You'd do something like this:
$(document).ready( function() {
$('table#with_slow_data').show();
$('div#loading image or text').hide();
});