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Postgresql - change the size of a varchar column to lower length
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There's a description of how to do this at Resize a column in a PostgreSQL table without changing data. You have to hack the database catalog data. The only way to do this officially is with ALTER TABLE, and as you've noted that change will lock and rewri...
What data type to use for money in Java? [closed]
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Why can't we use float or double instead ?
– Erran Morad
Jun 29 '14 at 6:19
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TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
... # Duplicates should be prevented.
models.Question.objects.create(domain=self.domain, slug='barks')
self.fail('Duplicate question allowed.')
except IntegrityError:
pass
do_more_model_stuff()
In Django 1.4, this works fine. However, in Django 1.5/1.6, each test is ...
How to detect orientation change?
...dFinishLaunchingWithOptions function I put:
NotificationCenter.default.addObserver(self, selector: #selector(AppDelegate.rotated), name: UIDevice.orientationDidChangeNotification, object: nil)
and then inside the AppDelegate class I put the following function:
func rotated() {
if UIDeviceO...
How do you change Background for a Button MouseOver in WPF?
...he ControlTemplate. Changing your Style definition to the following should do the trick:
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="Green"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType=...
Getting the application's directory from a WPF application
I found solutions for Windows Forms with AppDomain but what would be the equivalent for a WPF Application object?
8 Answe...
Android: Go back to previous activity
I want to do something simple on android app.
How is it possible to go back to a previous activity.
23 Answers
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How do I get formatted JSON in .NET using C#?
...": 3.99,
"Expiry": "\/Date(1230447600000-0700)\/",
"Name": "Apple"
}
Documentation: Serialize an Object
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Handler “ExtensionlessUrlHandler-Integrated-4.0” has a bad module “ManagedPipelineHandler” in its mo
...n I thought that I was going to get away with it, I realized my workaround doesn't work. Here's what I've tried to do:
22 A...
Speed up the loop operation in R
...e vector res which gather results. At the end I add it to data.frame and I don't need to mess with names.
So how better is it?
I run each function for data.frame with nrow from 1,000 to 10,000 by 1,000 and measure time with system.time
X <- as.data.frame(matrix(sample(1:10, n*9, TRUE), n, 9))
s...