how find the frequency of each element of an array

For example, consider the following array

arr = {1, 2, 3, 5, 2, 9, 7, 3, 5}

Output:

1 occurs 1 times

2 occurs 2 times

3 occurs 2 times

5 occurs 2 times

7 occurs 1 times

9 occurs 1 times

Use a second array to keep track of the frequency of each value with the indexof(value) expression.

For each element in originArray

If frequencyArray.indexof(originArray.CurValue)=-1 (doesn't exist), frequencyArray Push front originArray.CurValue, set value at 0,1 to 1.

Else set value at frequencyArray.indexof(originArray.CurValue), 1 to frequencyArray.At(frequencyArray.indexof(originArray.CurValue), 1) + 1

thanks, worked like a charm!