Array Difference


Your goal in this is to implement a difference function, which subtracts one list from another and returns the result.

It should remove all values from list a, which are present in list b.

array_diff([1,2],[1]) == [2]

If a value is present in b, all of its occurrences must be removed from the other:

array_diff([1,2],[1]) == [2]

Create a method called array_diff that accepts two arrays.

def array_diff(a, b) end
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