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Thursday Code Puzzler: Intersection of Two Arrays

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Thursday Code Puzzler: Intersection of Two Arrays

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Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Do you have code puzzlers that you'd like to share with the DZone community?  If so, please submit here. 

Find The Intersection of Two Arrays

Given two unsorted arrays as input to a function, find what the intersection (i.e. common elements) of these two arrays is. For example, with the arrays {1,3,5,7,9} and {1,2,3,4,5} the result would be {1,3,5}.

For this solution, focus on the efficiency.


Catch up on all our previous puzzlers here.

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