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stack |
5 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Stack \Stack\, v. t. [imp. & p. p. {Stacked}; p. pr & vb n. {Stacking}.] [Cf. Sw stacka, Dan. stakke. See {Stack}, n.] To lay in a conical or other pile; to make into a large pile; as to stack hay, cornstalks, or grain; to stack or place wood. {To stack arms} (Mil.), to set up a number of muskets or rifles together, with the bayonets crossing one another, and forming a sort of conical pile. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Stack \Stack\, a. [Icel. stakkr akin to Sw stack, Dan. stak. Sf {Stake}.] 1. A large pile of hay, grain, straw, or the like usually of a nearly conical form but sometimes rectangular or oblong, contracted at the top to a point or ridge, and sometimes covered with thatch. But corn was housed, and beans were in the stack. --Cowper. 2. A pile of poles or wood, indefinite in quantity. Against every pillar was a stack of billets above a man's height. --Bacon. 3. A pile of wood containing 108 cubic feet. [Eng.] 4. (Arch.) a A number of flues embodied in one structure, rising above the roof. Hence: b Any single insulated and prominent structure, or upright pipe, which affords a conduit for smoke; as the brick smokestack of a factory; the smokestack of a steam vessel. From WordNet r 1.6 [wn]: stack n 1: an orderly pile 2: (often followed by `of') a large number or amount or extent: "a batch of letters"; "a deal of trouble"; "a lot of money"; "it must have cost plenty" [syn: {batch}, {deal}, {flock}, {good deal}, {great deal}, {hatful}, {heap}, {lot}, {mass}, {mess}, {mickle}, {mint}, {muckle}, {peck}, {pile}, {plenty}, {pot}, {quite a little}, {raft}, {sight}, {slew}, {spate}, {tidy sum}, {wad}, {whole lot}, {whole slew}] 3: a list in which the next item to be removed is the item most recently stored (LIFO) [syn: {push-down list}, {push-down stack}] 4: a large tall chimney through which combustion gases and smoke can be evacuated [syn: {smokestack}] 5: a storage device that handles data so that the next item to be retrieved is the item most recently stored; last in first out (LIFO) [syn: {push-down storage}, {push-down store}] v 1: load or cover with stacks; "stack a truck with boxes" 2: to arrange in a stack or pile; "stagger the chairs in the lecture hall" [syn: {stagger}, {distribute}] 3: arrange in stacks; "heap firewood around the fireplace"; "stack your books up on the shelves" [syn: {pile}, {heap}] From Jargon File (4.2.3, 23 NOV 2000) [jargon]: stack n. The set of things a person has to do in the future. One speaks of the next project to be attacked as having risen to the top of the stack. "I'm afraid I've got real work to do so this'll have to be pushed way down on my stack." "I haven't done it yet because every time I pop my stack something new gets pushed." If you are interrupted several times in the middle of a conversation, "My stack overflowed" means "I forget what we were talking about." The implication is that more items were pushed onto the stack than could be remembered, so the least recent items were lost. The usual physical example of a stack is to be found in a cafeteria: a pile of plates or trays sitting on a spring in a well so that when you put one on the top they all sink down and when you take one off the top the rest spring up a bit. See also {push} and {pop}. At MIT, {PDL} used to be a more common synonym for {stack} in all these contexts, and this may still be true. Everywhere else {stack} seems to be the preferred term. {Knuth} ("The Art of Computer Programming", second edition, vol. 1, p. 236) says: Many people who realized the importance of stacks and queues independently have given other names to these structures: stacks have been called push-down lists, reversion storages, cellars, nesting stores, piles, last-in-first-out ("LIFO") lists, and even yo-yo lists! From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]: stack(See below for synonyms) A data structure for storing items which are to be accessed in last-in first-out order The operations on a stack are to create a new stack, to push" a new item onto the top of a stack and to pop" the top item off Error conditions are raised by attempts to pop an empty stack or to push an item onto a stack which has no room for further items (because of its implementation). Most processors include support for stacks in their {instruction set architecture}s. Perhaps the most common use of stacks is to store subroutine arguments and return addresses. This is usually supported at the {machine code} level either directly by "jump to subroutine" and "return from subroutine" instructions or by {auto-increment} and auto-decrement {addressing mode}s, or both These allow a contiguous area of memory to be set aside for use as a stack and use either a special-purpose {register} or a general purpose register, chosen by the user, as a {stack pointer}. The use of a stack allows subroutines to be {recursive} since each call can have its own calling context, represented by a stack frame or {activation record}. There are many other uses. The programming language {Forth} uses a data stack in place of variables when possible. Although a stack may be considered an {object} by users, implementations of the object and its access details differ. For example, a stack may be either ascending (top of stack is at highest address) or descending. It may also be full" (the stack pointer points at the top of stack) or empty" (the stack pointer points just past the top of stack, where the next element would be pushed). The full/empty terminology is used in the {Acorn Risc Machine} and possibly elsewhere. In a list-based or {functional language}, a stack might be implemented as a {linked list} where a new stack is an empty list, push adds a new element to the head of the list and pop splits the list into its head (the popped element) and tail (the stack in its modified form). At {MIT}, {pdl} used to be a more common synonym for stack, and this may still be true. {Knuth} ("The Art of Computer Programming", second edition, vol. 1, p. 236) says: Many people who realised the importance of stacks and queues independently have given other names to these structures: stacks have been called push-down lists, reversion storages, cellars, dumps, nesting stores, piles, last-in first-out ("LIFO") lists, and even yo-yo lists! [{Jargon File}] (1995-04-10)
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