List array duplicates with count

Question

I have an array which contains the following results

red 
red
red
blue
blue
Green
White
Grey

and I want to get duplicate count of every val

Answer 1

make another array of counts ....and loop on the original array putting a condition that if it found red increment the 1st cell of the count array ...if it found blue increment the second cell in the count array ....etc. Good Luck .