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Transposing a NumPy array
... into a 2D array and then transpose it, just slice it with np.newaxis (or None, they're the same, newaxis is just more readable).
import numpy as np
a = np.array([5,4])[np.newaxis]
print(a)
print(a.T)
Generally speaking though, you don't ever need to worry about this. Adding the extra dimension i...
Test if lists share any items in python
I want to check if any of the items in one list are present in another list. I can do it simply with the code below, but I suspect there might be a library function to do this. If not, is there a more pythonic method of achieving the same result.
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Angular directives - when and how to use compile, controller, pre-link and post-link [closed]
When writing an Angular directive, one can use any of the following functions to manipulate the DOM behaviour, contents and look of the element on which the directive is declared:
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Why does Java's hashCode() in String use 31 as a multiplier?
...iplying by 31 can be relatively cheap. On an ARM, for instance, it is only one instruction:
RSB r1, r0, r0, ASL #5 ; r1 := - r0 + (r0<<5)
Most other processors would require a separate shift and subtract instruction. However, if your multiplier is slow this is still a win. Modern p...
Swift compiler segmentation fault when building
... Swift has been giving me unpleasant surprises all along the way, but this one is way over the limit.
– CodeBrew
Feb 15 '15 at 22:37
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show ...
How do I make and use a Queue in Objective-C?
...ex:0];
}
return headObject;
}
// Add to the tail of the queue (no one likes it when people cut in line!)
- (void) enqueue:(id)anObject {
[self addObject:anObject];
//this method automatically adds to the end of the array
}
@end
Just import the .h file wherever you want to use your...
Scalar vs. primitive data type - are they the same thing?
...context (and frequently what language family is being discussed). To take one, possibly pathological, example: strings. In C, a string is a compound (an array of characters), while in Perl, a string is a scalar. In Java, a string is an object (or reference type). In Python, everything is (conceptua...
Custom domain for GitHub project pages
I have a gh-pages branch in one of my http://github.com repos. The GitHub project pages works fine if I go to http://myuser.github.com/myrepo
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Copy values from one column to another in the same table
How can I make a copy values from one column to another? I have:
7 Answers
7
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Various ways to remove local Git changes
I just cloned a git repository and checked out a branch. I worked on it, and then decided to remove all my local changes, as I wanted the original copy.
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