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URL query parameters to dict python
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193
Use the urllib.parse library:
>>> from urllib import parse
>>> url = "http://...
Why are my basic Heroku apps taking two seconds to load?
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edited Jan 20 '18 at 22:03
Tomáš Hübelbauer
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Install MySQL on Ubuntu without a password prompt
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432
sudo debconf-set-selections <<< 'mysql-server mysql-server/root_password password your...
How is pattern matching in Scala implemented at the bytecode level?
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3 Answers
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Comparing two CGRects
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Johannes Fahrenkrug
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answered Sep 16 '13 at 3:44
Amelia777Am...
deleting rows in numpy array
...mpy.delete method.
Suppose I have the following array x:
x = array([[1,2,3],
[4,5,6],
[7,8,9]])
To delete the first row, do this:
x = numpy.delete(x, (0), axis=0)
To delete the third column, do this:
x = numpy.delete(x,(2), axis=1)
So you could find the indices of the rows ...
What is the correct way of using C++11's range-based for?
... the elements
Let's consider a simple example:
vector<int> v = {1, 3, 5, 7, 9};
for (auto x : v)
cout << x << ' ';
The above code prints the elements (ints) in the vector:
1 3 5 7 9
Now consider another case, in which the vector elements are not just simple integers,
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Why do we have map, fmap and liftM?
...onad without also being an instance of Functor.
-- Typeclassopedia, page 33
Edit: agustuss's history of map and fmap:
That's not actually how it happens. What happened was that the type of map was generalized to cover Functor in Haskell 1.3. I.e., in Haskell 1.3 fmap was called map. This chan...