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How to slice an array in Bash
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edited Jul 24 '18 at 16:35
Nicholas Pipitone
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ans...
how does multiplication differ for NumPy Matrix vs Array classes?
...nd it more trouble than it's worth, though.
For arrays (prior to Python 3.5), use dot instead of matrixmultiply.
E.g.
import numpy as np
x = np.arange(9).reshape((3,3))
y = np.arange(3)
print np.dot(x,y)
Or in newer versions of numpy, simply use x.dot(y)
Personally, I find it much more readab...
Bomb dropping algorithm
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5
@beaker, please read the problem carefully. Bombing a square reduces all eight of its neighbors, so his assumption there is actually correct...
Syntax for creating a two-dimensional array
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Try the following:
int[][] multi = new int[5][10];
... which is a short hand for something like this:
int[][] multi = new int[5][];
multi[0] = new int[10];
multi[1] = new int[10];
multi[2] = new int[10];
multi[3] = new int[10];
multi[4] = new int[10];
Note that e...
Pandas index column title or name
...index name.
– Piotr Migdal
Apr 11 '15 at 20:37
14
it should be possible to specify index name at ...
How to test valid UUID/GUID?
... only accepts non-NIL UUIDs. Both of these solutions are for versions 1 to 5 (see the first character of the third block).
Therefore to validate a UUID...
/^[0-9a-f]{8}-[0-9a-f]{4}-[0-5][0-9a-f]{3}-[089ab][0-9a-f]{3}-[0-9a-f]{12}$/i
...ensures you have a canonically formatted UUID that is Versio...
How to iterate for loop in reverse order in swift?
...ge in reverse order, they can be used as below:
for index in stride(from: 5, to: 1, by: -1) {
print(index)
}
//prints 5, 4, 3, 2
for index in stride(from: 5, through: 1, by: -1) {
print(index)
}
//prints 5, 4, 3, 2, 1
Note that neither of those is a Range member function. They are global...
Multiple linear regression in Python
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djsdjs
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...
Numbering rows within groups in a data frame
... Frank
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answered Oct 16 '12 at 23:41
mnelmnel
103k2424 gold badges...