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How do you test that a Python function throws an exception?
...Case.assertRaises (or TestCase.failUnlessRaises) from the unittest module, for example:
import mymod
class MyTestCase(unittest.TestCase):
def test1(self):
self.assertRaises(SomeCoolException, mymod.myfunc)
sha...
performSelector may cause a leak because its selector is unknown
...
Solution
The compiler is warning about this for a reason. It's very rare that this warning should simply be ignored, and it's easy to work around. Here's how:
if (!_controller) { return; }
SEL selector = NSSelectorFromString(@"someMethod");
IMP imp = [_controller meth...
What new capabilities do user-defined literals add to C++?
...actually surprised one isn't in there. Maybe we should propose one or two for 2014 if it isn't too late.
– emsr
Mar 10 '13 at 0:26
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Why is parenthesis in print voluntary in Python 2.7?
...,)
(1,2) # (1, 2)
1,2 # 1 2 -- no tuple and no parenthesis :) [See below for print caveat.]
However, since print is a special syntax statement/grammar construct in Python 2.x then, without the parenthesis, it treats the ,'s in a special manner - and does not create a Tuple. This special treatmen...
C default arguments
...y would be to write a varargs function and manually fill in default values for arguments which the caller doesn't pass.
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How do I import the Django DoesNotExist exception?
...em is that you are calling the get method - which raises the exception - before it is passed to assertRaises. You need to separate the arguments from the callable, as described in the unittest documentation:
self.assertRaises(Answer.DoesNotExist, Answer.objects.get, body__exact='<p>User can r...
Determining Referer in PHP
...ginating on my site.
Edit: I am looking to verify that a script that preforms a series of actions is being called from a page on my website.
...
How do I create some kind of table of content in GitHub wiki?
...ee a little link simple to the left of it, you can also use that link. The format for that link is <project URL#<header name>. The <header name> must be all lower case.
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Instagram how to get my user id from username?
...ttps://www.instagram.com/{username}/?__a=1
E.g:
This url will get all information about a user whose username is therock
https://www.instagram.com/therock/?__a=1
Update i June-20-2019, the API is public now. No authentication required.
Update in December-11-2018, I needed to confirm that th...
C++ equivalent of java's instanceof
...ign of poor design.
Typical workarounds is putting the special behaviour for the class you are checking for into a virtual function on the base class or perhaps introducing something like a visitor where you can introduce specific behaviour for subclasses without changing the interface (except for...