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surface plots in matplotlib
...ceforge.net/mpl_examples/mplot3d/surface3d_demo.py
here's pythonic way to convert your 3-tuples to 3 1d arrays.
data = [(1,2,3), (10,20,30), (11, 22, 33), (110, 220, 330)]
X,Y,Z = zip(*data)
In [7]: X
Out[7]: (1, 10, 11, 110)
In [8]: Y
Out[8]: (2, 20, 22, 220)
In [9]: Z
Out[9]: (3, 30, 33, 330)
...
Builder Pattern in Effective Java
...k. If it is non-static, it would require an instance of its owning class - and the point is not to have an instance of it, and even to forbid making instances without the builder.
public class NutritionFacts {
public static class Builder {
}
}
Reference: Nested classes
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Pointer to class data member “::*”
...nest, I've never had to use them in my own code.
Edit: I can't think off-hand of a convincing use for pointers to member data. Pointer to member functions can be used in pluggable architectures, but once again producing an example in a small space defeats me. The following is my best (untested) tr...
Why can't C# interfaces contain fields?
For example, suppose I want an ICar interface and that all implementations will contain the field Year . Does this mean that every implementation has to separately declare Year ? Wouldn't it be nicer to simply define this in the interface?
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Suppress warning CS1998: This async method lacks 'await'
...the classes that implements the interface does not have anything to await, and some might just throw. It's a bit annoying with all the warnings.
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Where and why do I have to put the “template” and “typename” keywords?
In templates, where and why do I have to put typename and template on dependent names?
What exactly are dependent names anyway?
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Remove blank lines with grep
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Good point about converting to UNIX-style line endings otherwise regular expressions may not work as expected. Nothing here worked for me until I converted the line endings.
– Ryan H.
Aug 31 '16 at 14:41...
Scala constructor overload?
...ary Constructors in Scala must either call the primary constructor (as in landon9720's) answer, or another auxiliary constructor from the same class, as their first action. They cannot simply call the superclass's constructor explicitly or implicitly as they can in Java. This ensures that the primar...
How to declare constant map
...a func you can declare it like:
romanNumeralDict := map[int]string{
...
And in Go there is no such thing as a constant map. More information can be found here.
Try it out on the Go playground.
share
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Implement Stack using Two Queues
...eue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch the names of queue1 and queue2
pop:
...