
Abstract Data Types Variable name ; = 5 a set of values that it may assume int g. value e Data type set of values that a variable may assume set of operations Abstract Data Type mathematical set of values (model of data) set of operations ADT: List Definition: Operations sequence of zero or insert more elements of a first, next, previous given type null Recursive definition: find a null or a pair of an retrieve element and a list delete Subtypes: Implementation: single-linked list arrays doubly-linked list records linked with pointers cursors ADT: Stack Definition: Operations A kind of list in which push all insertions and pop deletions occur at null one end (the top) a LIFO queue Implementation Last In First Out array records linked with pointers 1 ADT: Queue Definition: Operations: A kind of list in which enqueue elements are dequeue inserted at one and (the rear)and Implementation: deleted at the other records linked with pointers (the front) circular array a FIFO queue First In First Out ADT: Vector or Array Definition: Operations: A sequence of Assign (Set) elements of a given Get type, in which Implementation: each element is given by an integer index Array A function from a Growable Array continuous subset of (Reallocable Array) integer type to the List range type ADT: Map or Associative Store Definition: Operations: A function from an Assign (Set) element of a domain Get type to the range type Implementation: List of Pairs An array in which indexes may be of any Vector of Pairs type (domain type) a hardware solution: Associative Memory 2.
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