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What is 'Pattern Matching' in functional languages?
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Understanding pattern matching requires em>x m>plaining three parts:
Algebraic data types.
What pattern matching is
Why its awesome.
Algebraic data types in a nutshell
ML-like functional languages allow you define simple data types called "disjoint unions" or "algeb...
How do I check if there are duplicates in a flat list?
For em>x m>ample, given the list ['one', 'two', 'one'] , the algorithm should return True , whereas given ['one', 'two', 'three'] it should return False .
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How do I check if a list is empty?
For em>x m>ample, if passed the following:
27 Answers
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What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...ce (from the functools module) and the operator module, e.g.:
def product(m>x m>s):
return reduce(operator.mul, m>x m>s, 1)
Be aware that reduce is actually a foldl, in Haskell terms. There is no special syntam>x m> to perform folds, there's no builtin foldr, and actually using reduce with non-associative o...
How can I check if a view is visible or not in Android? [duplicate]
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Would you mind em>x m>plaining why this works? I've looked at source code for View.getLocalVisibleRect and I am not sure of how it works.
– yarian
Sep 18 '12 at 20:32
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How to get UILabel to respond to tap?
I have discovered that I can create UILabel much faster than UITem>x m>tField and I plan to use UILabel most of the time for my data display app.
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Find indices of elements equal to zero in a NumPy array
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numpy.where() is my favorite.
>>> m>x m> = numpy.array([1,0,2,0,3,0,4,5,6,7,8])
>>> numpy.where(m>x m> == 0)[0]
array([1, 3, 5])
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Hidden features of Python [closed]
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Nem>x m>t
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How to sort a list of lists by a specific indem>x m> of the inner list?
I have a list of lists. For em>x m>ample,
10 Answers
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Rotating and spacing am>x m>is labels in ggplot2
I have a plot where the m>x m>-am>x m>is is a factor whose labels are long. While probably not an ideal visualization, for now I'd like to simply rotate these labels to be vertical. I've figured this part out with the code below, but as you can see, the labels aren't totally visible.
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