This question already has answers here:
How do I pick randomly from an array?
(7 answers)
Closed 8 years ago.
I am trying to understand how to use rand to do this. if there were two players for example player a and player b and the computer had to be one and the human the other. How would i implement this?
[:computer, :player].shuffle.first will give you on random who is first.
Related
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What's the difference of Step and Step Into in Google Chrome developer tools?
(1 answer)
What is the difference between Step Into and Step Over in a debugger
(6 answers)
Closed 10 months ago.
I think I have an idea of what the difference between Step Into and Step Over is.
The confusion comes when comparing Step and Step Into. I couldn't find anything online about difference between both.
Is it related to the way the debugger treats async code?
This question already has answers here:
Java mapToInt vs Reduce with map
(2 answers)
Is there any advantage of calling map after mapToInt, where ever required
(3 answers)
Closed 3 years ago.
Following streams produces the same result however there are two different ways to achieve this.
Person.stream().map(Person::getAge).reduce(Integer::sum).get();
Person.stream().mapToInt( Person::getAge).sum();
I want to know difference among two and which one is better.
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What algorithm does Python's built-in sort() method use?
(2 answers)
Closed 7 years ago.
I have always heard that usually merge sort is used for in built functions. But I cannot understand why. Quicksort is faster obviously with exact time complexity of 1.39NlogN and also it is in place! then why not quick sort?
timesort algo is used in the inbuilt sort
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Quick Sort in Ruby language
(6 answers)
Closed 7 years ago.
I'm having trouble wrapping my head around a in-place quick sort. I understand it using sub-arrays, but in-place is really throwing me.
Having an example in Ruby would really help, but I haven been able to find one. Could some one provide me with an example or point me in the right direction?
Rather than trying to understand it in code, there's a number of very elegant explanations of the quicksort algorithm out there. Here are a few of my favorite illustrations which may help your understanding.
With cups
With Hungarian Dance
As for a Ruby example, the answers to this question cover that.
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Classification score: SVM
(2 answers)
Closed 8 years ago.
I am using libsvm python interface and wondering is there a way to get a confidence score/probability when using multi-classification
I'd recommend the scikit-learn wrapper of libSVM which incoroporates a predict_proba function and a score function http://scikit-learn.org/stable/modules/generated/sklearn.svm.SVC.html#sklearn.svm.SVC.