Download e-book for kindle: Computer Methods in Operations Research by Arne Thesen and J. William Schmidt (Auth.)

By Arne Thesen and J. William Schmidt (Auth.)

ISBN-10: 0126861501

ISBN-13: 9780126861501

Computing device equipment in Operations examine (Operations examine and commercial engineering sequence)

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II-9. Note that the backward pointers are not initialized as they are not needed in the garbage list, nor was it necessary to initialize the data storage array ALIST. Subroutine I N S E R T (Fig. 11-10) is used to insert an item into the list in a position such that the data items in the list are always maintained in increasing numeric order. When requested to insert an item, I N S E R T ñrst checks to make sure that the garbage list is not empty so that a storage location will be available for the new item.

1 n-bucket sort-merge segment. A Comparison of Different Methods It is often difficult to decide which of the many different approaches to sorting should be used for a particular appUcation. The dominant criteria for making such a selection usually are core space, execution time, and avail­ ability. Since considerable time and effOrt is expended in writing and testing a new sort code, availability is probably the prime criteria for short, one-shot applications. Time and core requirements become the overriding concerns for extensive or repeated applications.

LIST(10,1) = 8). 28 II. LIST PROCESSING FWD = 1 BCK = 2 sue HEAD = PRED = 0 POS = 0 I T H = desired logical position of new item D A T A = value of new itenn N E W = physical location of new item PRED = sue POS = POS + sue = LiST(sue, F W D ) Find locations of logical successor and predecessor of new item "POS < 1 Item is inserted at end of list as list contains less than /th items Yes ITH^ ? Tno No Attach new item to list Yes Item at tail of list? Attach list to item LISTINEW, FWD) = SUe LIST(NEW, BeK) = PRED TAIL = N E W LiST(sue, BeK) = N E W Item at head of list?

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Computer Methods in Operations Research by Arne Thesen and J. William Schmidt (Auth.)


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