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Topic: Deque

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	Deque
		Deque allows elements to be inserted/removed from arbitrary points in a sequence more efficiently than a vector can, although not in constant time.
		Random access to elements contained in a deque is slightly less efficient when compared to a vector due to an additional level of indirection.
		This is because a deque will allocate a new block of memory when the memory buffer is exausted and begin using it to store the new elements.
	www.mtsu.edu /~csjudy/STL/Deque.html (598 words)

	Deque (Java Platform SE 6)
		When a deque is used as a stack, elements are pushed and popped from the beginning of the deque.
		method works equally well when a deque is used as a queue or a stack; in either case, elements are drawn from the beginning of the deque.
		Retrieves and removes the head of the queue represented by this deque (in other words, the first element of this deque).
	java.sun.com /javase/6/docs/api/java/util/Deque.html (2237 words)

	GotW #54: Using Vector and Deque
		deque is the data structure of choice when most insertions and deletions take place at the beginning or at the end of the sequence.
		I'd like to present an amiably dissenting point of view: I recommend that you consider preferring deque by default instead of vector, especially when the contained type is a class or struct and not a builtin type, unless you really need the container's memory to be contiguous.
		A deque offers constant-time insert() and erase() operations at the front of the container, whereas a vector does not -- hence the note in the Standard about using a deque if you need to insert or erase at both ends of the sequence.
	www.gotw.ca /gotw/054.htm (1723 words)

	5.3.1 deque objects
		is not specified, the new deque is empty.
		Deques are a generalization of stacks and queues (the name is pronounced ``deck'' and is short for ``double-ended queue'').
		Deques support thread-safe, memory efficient appends and pops from either side of the deque with approximately the same
	docs.python.org /lib/deque-objects.html (213 words)

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	[No title]
		The STL deque has many similarities with vector but they differ in one important respect: you can manipulate with both ends of deque.
		Deques are sequence containers of choice when fast random access is needed, and if insertions or deletions are required at the beginning and the end of the sequence.
		Although deques allow array-style indexing, their elements can be also accessed through an iterator.
	acc6.its.brooklyn.cuny.edu /~cis22/stl/deque.htm (444 words)

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	deque::deque (Standard C++ Library Reference)
		Constructs a deque of a specific size or with elements of a specific value or with a specific allocator or as a copy of all or part of some other deque.
		The deque of which the constructed deque is to be a copy.
		The first two constructors specify an empty initial deque, the second specifying the allocator type (_Al) to be used.
	msdn.microsoft.com /library/en-us/vcstdlib/html/vclrfDequedeque.asp?frame=true (299 words)

	Class jgl.Deque
		A Deque is a sequential container that is optimized for fast indexed-based access and efficient insertion at either of its extremities.
		Deques are useful in circumstances where order, compact storage, and fast insertion at extremeties is important.
		In the worst cast, inserting a single element into a Deque takes linear time in the minimum of the distance from the insertion point to the beginning of the Deque and the distance from the insertion point to the end of the Deque.
	web.mit.edu /javadev/packages/jgl/doc/api/jgl.Deque.html (1580 words)

	deque<T, Alloc>
		Defined in the standard header deque, and in the nonstandard backward-compatibility header deque.h.
		The deque's value type: the type of object that is stored in the deque.
		[1] The name deque is pronounced "deck", and stands for "double-ended queue." Knuth (section 2.6) reports that the name was coined by E. Schweppe.
	www.sgi.com /tech/stl/Deque.html (465 words)

	Wintellog - The Deque class (Site not responding. Last check: 2007-10-20)
		In addition to these traditional Deque operations, the Deque class allows all the flexibility of a List: you can access any item in the Deque by index (the front is always index zero), and you can also insert and remove items anywhere in the Deque.
		The Deque may “wrap around” the end of buffer, such if the buffer has 10 items, for example, start might be 8, and end might be 2, so that the first item in the Deque is at
		Deque is much faster than list, however, when adding and removing items at the front, or very close to the front.
	www.wintellect.com /Weblogs/TheDequeClass.aspx (614 words)

	Standard Library News, Part 1: Vectors and Deques
		A deque offers constant-time insert() and erase() operations at the front of the container, whereas a vector does not--hence the note in the Standard about using a deque if you need to insert or erase at both ends of the sequence.
		For example, a 10-megabyte vector uses a single 10-megabyte block of memory; on some operating systems that single block can be less efficient in practice than a 10-megabyte deque that can fit in a series of smaller blocks of memory.
		Get in the habit of always using deque instead of vector whenever you don't need all of the contained elements to be contiguous in memory.
	www.gotw.ca /publications/mill10.htm (2591 words)

	deque
		are inserted at the end of the deque.
		's are inserted at the end of the deque.
		For compilers that do not support this feature we provide substitute functions that allow you to use an iterator obtained from the same type of container as the one you are constructing (or calling a member function on), or you can use a pointer to the type of element you have in the container.
	www.roguewave.com /support/docs/hppdocs/stdref/deque.html (665 words)

	Wintellect.PowerCollections
		A Deque is quite similar to a List, in that items have indices (starting at 0), and the item at any index can be efficiently retrieved.
		In a Deque, items can be added to the beginning or end equally efficiently, regardless of the number of items in the Deque.
		As a trade-off for this increased flexibility, Deque is somewhat slower than List (but still constant time) when being indexed to get or retrieve elements.
	www.wintellect.com /PowerCollections/Docs (1068 words)

	INFO: STL Sample for deque::push_back and deque::pop_back Functions
		The push_back function inserts an element with value x at the end of the container deque.
		The pop_back function removes the last element of the container deque, which must be non-empty.
		NOTE: In the first line of the sample code section, /GX is equivalent to /EHsc in VC++.NET and is set by default.
	support.microsoft.com /kb/156759 (230 words)

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	www.deque.com (138 words)

	Dinkumware, Ltd. - Compleat Libraries Reference - <deque> (Site not responding. Last check: 2007-10-20)
		Note that the stored allocator object is not copied when the container object is assigned.
		Deque reallocation occurs when a member function must insert or erase elements of the controlled sequence:
		The type describes an object that can serve as a constant reverse random-access iterator for the controlled sequence.
	www.dinkumware.com /manuals/reader.aspx?b=p/&h=deque.html (1563 words)

	Deque
		The Deque class is an extension of the Queue class It adds methods which allow both enqueueing and dequeueing from either end of the queue, and has methods to "peek" at the ends of the queue without removing them
		This method returns the object stored at the front of the Deque without removing it
		This method returns the object stored at the back of the Deque without removing it
	physics.syr.edu /condensedmatter/RFIM/pr2/docs/Deque.html (141 words)

	deque
		deque is a type of sequence that supports random access iterators.
		It supports constant time insert and erase operations at the beginning or the end of the container.
		For compilers that do not support this feature, substitute functions allow you to use an iterator obtained from the same type of container as the one you are constructing (or calling a member function on), or you can use a pointer to the type of element you have in the container.
	www.roguewave.com /support/docs/sourcepro/edition9/html/stdlibref/deque.html (796 words)

	Deque
		A deque is a random access container that is both a front insertion sequence and a back insertion sequence.
		A simplified declaration for an STL deque template would look something like:
		Links contained at this web site to other organizations, are presented as a service and neither constitute nor imply university endorsement or warranty.
	www.cs.bsu.edu /homepages/peb/cplusplus/deque.htm (95 words)

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