keys HashTable -- keys used in a hash table

keys HashTable -- keys used in a hash table

Synopsis:

Usage: x = keys t

Function: keys -- keys used in a hash table

Input:

t, an instance of class HashTable.

Output:

x, an instance of class List: a list of the keys occurring in the hash table t.

i1 : x = new HashTable from {a => 1, b => 2}



o1 = HashTable{a => 1}

               b => 2



o1 : HashTable

i2 : keys x



o2 = {a, b}



o2 : List