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Arrays have better cache locality as compared to linked lists.Linked lists are among the simplest and most common data structures.This structure allows for efficient insertion or removal of elements from any position in the sequence during iteration.More complex variants add additional links, allowing efficient insertion or removal from arbitrary element references.They can be used to implement several other common abstract data types, including lists, stacks, queues, associative arrays, and S-expressions, though it is not uncommon to implement the other data structures directly without using a list as the basis of implementation.

A variant developed by TSC for and marketed by Smoke Signal Broadcasting in California, used doubly linked lists in the same manner.In a 'doubly linked list', each node contains, besides the next-node link, a second link field pointing to the 'previous' node in the sequence.The two links may be called 'forward('s') and 'backwards', or 'next' and 'prev'('previous').The now-classic diagram consisting of blocks representing list nodes with arrows pointing to successive list nodes appears in "Programming the Logic Theory Machine" by Newell and Shaw in Proc. Newell and Simon were recognized with the ACM Turing Award in 1975 for having "made basic contributions to artificial intelligence, the psychology of human cognition, and list processing".The problem of machine translation for natural language processing led Victor Yngve at Massachusetts Institute of Technology (MIT) to use linked lists as data structures in his COMIT programming language for computer research in the field of linguistics.IPL was used by the authors to develop several early artificial intelligence programs, including the Logic Theory Machine, the General Problem Solver, and a computer chess program.Reports on their work appeared in IRE Transactions on Information Theory in 1956, and several conference proceedings from 1957 to 1959, including Proceedings of the Western Joint Computer Conference in 19, and Information Processing (Proceedings of the first UNESCO International Conference on Information Processing) in 1959.Linked lists were developed in 1955–1956 by Allen Newell, Cliff Shaw and Herbert A.Simon at RAND Corporation as the primary data structure for their Information Processing Language.The remaining fields are known as the 'data', 'information', 'value', 'cargo', or 'payload' fields. The 'tail' of a list may refer either to the rest of the list after the head, or to the last node in the list.In Lisp and some derived languages, the next node may be called the 'cdr' (pronounced could-er) of the list, while the payload of the head node may be called the 'car'.


  1. It sounds like what you need to do is eliminate the retention of any deleted items. Right-click on your pivot table, select Pivot Table options, and go to the Data tab.

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