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numpy: most efficient frequency counts for unique values in an array
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Take a look at np.bincount:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.bincount.html
import numpy as np
x = np.array([1,1,1,2,2,2,5,25,1,1])
y = np.bincount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
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How to override equals method in Java
... name and age . Now I want to override equals method so that I can check between 2 People objects.
9 Answers
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How to write a JSON file in C#?
...write the following data into a text file using JSON format in C#. The brackets are important for it to be valid JSON format.
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How do I iterate over an NSArray?
I'm looking for the standard idiom to iterate over an NSArray. My code needs to be suitable for OS X 10.4+.
8 Answers
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LEFT OUTER joins in Rails 3
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Neil MiddletonNeil Middleton
21.4k1717 gold badges7575 silver badges126126 bronze badges
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sed one-liner to convert all uppercase to lowercase?
...pper case
$ tr '[:lower:]' '[:upper:]' < input.txt > output.txt
Works using GNU sed (BSD sed doesn't support \L \U):
# Converts upper to lower case
$ sed -e 's/\(.*\)/\L\1/' input.txt > output.txt
# Converts lower to upper case
$ sed -e 's/\(.*\)/\U\1/' input.txt > output.txt
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Android get current Locale, not default
...() probably will not be immediately updated.
If you need to trap events like this for some reason in your application, you might instead try obtaining the Locale available from the resource Configuration object, i.e.
Locale current = getResources().getConfiguration().locale;
You may find that th...
How can I use a file in a command and redirect output to the same file without truncating it?
Basically I want to take as input text from a file, remove a line from that file, and send the output back to the same file. Something along these lines if that makes it any clearer.
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Swapping column values in MySQL
...ost apparent solution would be renaming the columns, but I don't want to make structure changes since I don't necessarily have permissions to do that.
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Can I use a binary literal in C or C++?
I need to work with a binary number.
19 Answers
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