Iterating through an array in Bash
I don’t like programming in bash but it does make some things very simple. Unfortunately, it is not obvious how to do some simple things like iterating through an array 
Assuming that we have an array ITEMS=( a b c d ), we can use a ${ITEMS[@]} construct to iterate through all the elements in a for loop:
ITEMS=( a b c d )
for ITEM in ${ITEMS[@]}; do
echo $ITEM
done
BTW: I found this pattern here.