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Python group by
Assume that I have a set of data pair where index 0 is the value and index 1 is the type:
6 Answers
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Troubleshooting “Illegal mix of collations” error in mysql
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Another option is to use the BINARY operator:
BINARY str is the shorthand for CAST(str AS BINARY).
Your solution might look something like this:
SELECT * FROM table WHERE BINARY a = BINARY b;
or,
SELECT * FROM table ORDER BY BINARY a;
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Circle line-segment collision detection algorithm?
I have a line from A to B and a circle positioned at C with the radius R.
27 Answers
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How to convert a number to string and vice versa in C++
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Update for C++11
As of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const s...
Cluster analysis in R: determine the optimal number of clusters
..., calinski.best, "\n")
# 5 clusters!
Four. Determine the optimal model and number of clusters according to the Bayesian Information Criterion for expectation-maximization, initialized by hierarchical clustering for parameterized Gaussian mixture models
# See http://www.jstatsoft.org/v18/i06/pap...
How can we generate getters and setters in Visual Studio?
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Rather than using Ctrl + K, X you can also just type prop and then hit Tab twice.
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
Performance associated with Arrays and Objects in JavaScript (especially Google V8) would be very interesting to document. I find no comprehensive article on this topic anywhere on the Internet.
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Are unused CSS images downloaded?
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Safari: Doesn't
IE8: Doesn't
IE7: Doesn't
IE6: Unknown (Can someone test and comment?)
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Convert a String In C++ To Upper Case
...it requires boost, or the title should be changed.
– Andrea
Nov 25 '15 at 11:53
5
This appears to...
Javascript what is property in hasOwnProperty?
...code rather than global or function code). I tried it in a blank HTML page and get a "cannot convert null to object" error.
– James Allardice
Feb 22 '12 at 14:39
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