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find the amount of different values in array

Solutionabc asked
Last Modified: 2012-06-27

I have an array that I would like to count the amount of different values that it holds. for example.


I would like to return 3 because that is the amount of unique numbers in the array.

also, I would like to do the same thing with an array that holds timestamps in the form of 2011-02-05 13:58:23 - i'm interested in finding the amount of unique stamps

thanks for the help.

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