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Changing Mercurial “Default” Parent URL
Let's say I have a Mercurial repository and I'm pulling from a default parent URL (the source I cloned it from).
3 Answers
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Python super() raises TypeError
...nly operates on new-style classes, which in the 2.x series means extending from object:
>>> class X(object):
def a(self):
print 'a'
>>> class Y(X):
def a(self):
super(Y, self).a()
print 'b'
>>> c = Y()
>>> c.a...
What's your most controversial programming opinion?
...rogrammers do nothing else than programming, but they do more than program from 9 to 5)
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edited Apr 17 '10 at 22:34
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C++: const reference, before vs after type-specifier
...le
Regarding which you should prefer stylistically, however, I'll dissent from a lot of the other answers and prefer const T& (and const T*):
const T& is the style used in Stroustrup's The C++ Programming Language book.
const T& is the style used in the C++ standard itself.
const T* i...
How do I allow HTTPS for Apache on localhost?
... I wonder how safe/dangerous is downloading *.crt *.key files from untrusted source instead of generating your own.
– Petr Peller
Apr 12 '16 at 16:22
4
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How to check if the string is empty?
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From PEP 8, in the “Programming Recommendations” section:
For sequences, (strings, lists, tuples), use the fact that empty sequences are false.
So you should use:
if not some_string:
or:
if some_string:
Just t...
Is there an ignore command for git like there is for svn?
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git ignore
Add a pattern
git ignore "*.log"
Add one of the templates from gitignore.io
git ignore-io -a rails
git-extras provides many more useful commands. Definitely worth trying out.
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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]
...s if somebody passes a unicode string to your function? Or a class derived from dict? Or a class implementing a dict-like interface? Following code covers first two cases. If you are using Python 2.6 you might want to use collections.Mapping instead of dict as per the ABC PEP.
def value_list(x):
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In PHP, can you instantiate an object and call a method on the same line?
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The feature you have asked for is available from PHP 5.4. Here is the list of new features in PHP 5.4:
http://php.net/manual/en/migration54.new-features.php
And the relevant part from the new features list:
Class member access on instantiation has been added, e.g...
Java Generics: Cannot cast List to List? [duplicate]
...t;? extends Tree> b1 = a1;
... because then you can only fetch things from b1, and they're guaranteed to be compatible with Tree. You can't call b1.add(...) precisely because the compiler won't know whether it's safe or not.
Have a look at this section of Angelika Langer's Java Generics FAQ fo...