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Why `null >= 0 && null
...d assigns 0 to the variable if not, where the variable is initially null or undefined .
5 Answers
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Using IPython notebooks under version control
What is a good strategy for keeping IPython notebooks under version control?
22 Answers
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How to get controls in WPF to fill available space?
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Each control deriving from Panel implements distinct layout logic performed in Measure() and Arrange():
Measure() determines the size of the panel and each of its children
Arrange() determines the rectangle where each control renders
The last child of the DockPanel fills the remaining space...
Avoiding instanceof in Java
...operations is considered a "code smell". The standard answer is "use polymorphism". How would I do it in this case?
9 Ans...
Split views.py in several files
... a view folder with an __init__.py inside and you still will be able to import your views, because this also implements a Python module. But an example would be better.
Your original views.py might look like this :
def view1(arg):
pass
def view2(arg):
pass
With the following folder/file ...
PHP Fatal error: Using $this when not in object context
... it is not static method
but can also be
$foobar = new foobar; // correct
$foobar->foobarfunc();
You can not invoke method this way because it is not static method.
foobar::foobarfunc();
You should instead use:
foobar->foobarfunc();
If however you have created a static method s...
How to get back to the latest commit after checking out a previous commit?
I sometimes check out some previous version of the code to examine or test. I have seen instructions on what to do if I wish to modify previous commits -- but suppose I make no changes. After I've done e.g. git checkout HEAD^ , how do I get back to the tip of the branch?.. git log no longer sho...
Cannot instantiate the type List [duplicate]
...ed a specific class in the end so
either try
List l = new ArrayList();
or
List l = new LinkedList();
Whichever suit your needs.
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What is “lifting” in Haskell?
I don't understand what "lifting" is. Should I first understand monads before understanding what a "lift" is? (I'm completely ignorant about monads, too :) Or can someone explain it to me with simple words?
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Why is there no xrange function in Python3?
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Some performance measurements, using timeit instead of trying to do it manually with time.
First, Apple 2.7.2 64-bit:
In [37]: %timeit collections.deque((x for x in xrange(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.05 s...