UseStoreFun.lhs Using an abstract data type StoreFun of stores of integers. (c) Simon Thompson, 1998. > module UseStoreFun where > import StoreFun A complex store. > store = update (update (update initial 'a' 4) 'b' 5) 'a' 3 Lookup 'a' in store3; can see that 'a' has the value 3 rather than 4. > find = value store 'a'