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Python decorators in classes
...
Would something like this do what you need?
class Test(object):
def _decorator(foo):
def magic( self ) :
print "start magic"
foo( self )
print "end magic"
return magic
@_decorator
def b...
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...
Redirect to an external URL from controller action in Spring MVC
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You can do it with two ways.
First:
@RequestMapping(value = "/redirect", method = RequestMethod.GET)
public void method(HttpServletResponse httpServletResponse) {
httpServletResponse.setHeader("Location", projectUrl);
http...
CSS: Animation vs. Transition
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It looks like you've got a handle on how to do them, just not when to do them.
A transition is an animation, just one that is performed between two distinct states - i.e. a start state and an end state. Like a drawer menu, the start state could be open and the end sta...
compareTo() vs. equals()
...ral method for it. After all, its name already says what it is intended to do. However, a colleague of mine recently told me had been taught to use compareTo() == 0 instead of equals() . This feels unnatural (as compareTo() is meant to provide an ordering and not compare for equality) and even ...
How do I turn a C# object into a JSON string in .NET?
...ializer.
Newtonsoft.Json.JsonConvert.SerializeObject(new {foo = "bar"})
Documentation: Serializing and Deserializing JSON
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How do you hide the Address bar in Google Chrome for Chrome Apps?
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You can run Chrome in application mode.
Windows:
Chrome.exe --app=https://google.com
Mac:
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --app=https://google.com
Linux:
google-chrome --app=https://google.com
This removes all toolbars, not just...