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Fastest way to determine if an integer's square root is an integer
I'm looking for the fastest way to determine if a long value is a perfect square (i.e. its square root is another integer):
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How does Dijkstra's Algorithm and A-Star compare?
I was looking at what the guys in the Mario AI Competition have been doing and some of them have built some pretty neat Mario bots utilizing the A* (A-Star) Pathing Algorithm.
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C char array initialization
I'm not sure what will be in the char array after initialization in the following ways.
6 Answers
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How to select rows from a DataFrame based on column values?
How to select rows from a DataFrame based on values in some column in Pandas?
10 Answers
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Why does ++[[]][+[]]+[+[]] return the string “10”?
This is valid and returns the string "10" in JavaScript ( more examples here ):
9 Answers
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Modifying a subset of rows in a pandas dataframe
Assume I have a pandas DataFrame with two columns, A and B. I'd like to modify this DataFrame (or create a copy) so that B is always NaN whenever A is 0. How would I achieve that?
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Most efficient way to create a zero filled JavaScript array?
What is the most efficient way to create an arbitrary length zero filled array in JavaScript?
41 Answers
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What is the most pythonic way to check if an object is a number?
Given an arbitrary python object, what's the best way to determine whether it is a number? Here is is defined as acts like a number in certain circumstances .
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Why does the expression 0 < 0 == 0 return False in Python?
Looking into Queue.py in Python 2.6, I found this construct that I found a bit strange:
9 Answers
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