pairs x -- makes a list of all key/value pairs (k,v) in a hash table x.
i1 : x = new HashTable from {a => 1, b => 2, c => 3} o1 = HashTable{a => 1} b => 2 c => 3 o1 : HashTable
i2 : pairs x o2 = {(c, 3), (a, 1), (b, 2)} o2 : List
Ways to use pairs :