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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.
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:
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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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.
This question already has answers here:
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.
This question already has answers here:
Reverse the ordering of words in a string
(48 answers)
Closed 9 years ago.
I was recently asked this question in an interview.
Initially, I was asked to reverse a sentence without using inbuilt String api methods like split etc.
I/p : I like god
O/p : god like I
I did this using a stack. His next question was to accomplish this without using additional memory.
How do we achieve this in java?
Thanks!
Reverse the sentence in-place on a character-by-character basis, then reverse each word in the sentence in-place on a character-by-character basis.