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django: BooleanField, how to set the default value to true?
...ou want to dynamically choose at runtime whether or not your field will be selected by default, you can use the initial parameter to the form when you initialize it:
form = MyForm(initial={'my_field':True})
share
...
Pointer to class data member “::*”
...unction that would do some pre &post processing before applying a user-selected member function to an object:
void Apply( SomeClass * c, void (SomeClass::*func)() ) {
// do hefty pre-call processing
(c->*func)(); // call user specified function
// do hefty post-call processing
}...
Detect Windows version in .net
...;
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem"))
{
ManagementObjectCollection information = searcher.Get();
if (information != null)
{
foreach (ManagementObject obj in information)
{
r = obj["Cap...
A definitive guide to API-breaking changes in .NET
...d resolution will no longer fail, but a different overload will be quietly selected by the compiler. In practice, however, it is very hard to run into this case without carefully constructing method signatures to deliberately cause it.
...
The order of elements in Dictionary
...r elements in key-order then they should to dict.Keys.OrderBy( k => k ).Select( k => dict[k] ) instead (at the cost of O(n) space and O( n log n ) time) for the OrderBy() (which will need to buffer the entire keys collection in an internal list).
– Dai
Oc...
How do I detect when someone shakes an iPhone?
... // Put in code here to handle shake
}
if ( [super respondsToSelector:@selector(motionEnded:withEvent:)] )
[super motionEnded:motion withEvent:event];
}
- (BOOL)canBecomeFirstResponder
{ return YES; }
@end
You can easily transform any UIView (even system views) into a view ...
What is the easiest way to disable/enable buttons and links (jQuery + Bootstrap)
... var $this = $(this);
if($this.is('input, button, textarea, select'))
this.disabled = state;
else
$this.toggleClass('disabled', state);
});
}
});
// Disabled on all:
$('input, button, a').disable(true);
// Enabled on all:
$('input,...
How can I test a Windows DLL file to determine if it is 32 bit or 64 bit? [duplicate]
...me>. I am not sure if file is part of the core setup, or if you have to select it for installation, but it's certainly available in Cygwin as I have used it in the past.
– DevSolar
Jan 27 '11 at 22:25
...
Button in a column, getting the row from which it came on the Click event handler
...h the command examples I've seen is that you have to databind the datagrid selected item to a member of your view model and thus it's hard to generisize the command enough to be good for a delete button. I want one delete button template column resource I can use to delete pretty much anything in my...
How to force NSLocalizedString to use a specific language
...ib languages, you have to reload the xibs by hand, from the bundle of your selected language.
– gklka
Jan 23 '14 at 21:57
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