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What are the advantages of NumPy over regular Python lists?
...cision numbers takes 4 bytes each, double-precision ones, 8 bytes. Less flexible, but you pay substantially for the flexibility of standard Python lists!
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How do you use the ellipsis slicing syntax in Python?
...up in Hidden features of Python , but I can't see good documentation or examples that explain how the feature works.
4 An...
How to use the toString method in Java?
Can anybody explain to me the concept of the toString() method, defined in the Object class? How is it used, and what is its purpose?
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Clean way to launch the web browser from shell script?
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xdg-open is standardized and should be available in most distributions.
Otherwise:
eval is evil, don't use it.
Quote your variables.
Use the correct test operators in the correct way.
Here is an example:
#!/bin/bash
if ...
Is there a way to specify an “empty” C# lambda expression?
I'd like to declare an "empty" lambda expression that does, well, nothing.
Is there a way to do something like this without needing the DoNothing() method?
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Does python have a sorted list?
...y form. The standard heapq module can be used to append in O(log n) to an existing list and remove the smallest one in O(log n), but isn't a sorted list in your definition.
There are various implementations of balanced trees for Python that meet your requirements, e.g. rbtree, RBTree, or pyavl.
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Scoping in Python 'for' loops
...ops. My question is why the design decisions were made in this way. For example (no pun intended):
6 Answers
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Java JUnit: The method X is ambiguous for type Y
...ssertEquals(double, double) both of which could be called, thanks to autoboxing.
To avoid the ambiguity, make sure that you either call assertEquals(Object, Object) (by passing two Doubles) or assertEquals(double, double) (by passing two doubles).
So, in your case, you should use:
assertEquals(D...
What is the meaning of id?
...ny type, but unlike void * it always points to an Objective-C object. For example, you can add anything of type id to an NSArray, but those objects must respond to retain and release.
The compiler is totally happy for you to implicitly cast any object to id, and for you to cast id to any object. Th...
Circle line-segment collision detection algorithm?
...tion is found by..
Plugging:
P = E + t * d
This is a parametric equation:
Px = Ex + tdx
Py = Ey + tdy
into
(x - h)2 + (y - k)2 = r2
(h,k) = center of circle.
Note: We've simplified the problem to 2D here, the solution we get applies also in 3D
to get:
Expand
x2 - 2xh + h2 + y2 - 2yk + k2 -...