Computers and Technology

Define a recursive function named set_assoc; it is passed an association tuple, key, and associated value as arguments; it returns an association tuple that contains all associations with (a) a new 2-tuple added at the end for this association (if the key is nowhere in the association tuple) or (b) one of the associations changed (if the key is already in the tuple). Keep the key order the same. For example, set_assoc( ( ('a',1), ('c',3)), 'b', 2 ) returns ( ('a',1), ('c',3), ('b',2) ) set_assoc( ( ('a',1), ('c',3), ('b',2) ), 'c', 13) returns ( ('a',1), ('c',13), ('b',2) ) Hint: build a new association tuple with all associations adding the new 2-tuple at the end for a new key or creating a new 2-tuple for an existing key.

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