class ResizingArrayQueue[A] extends Queue[A]
Provides a FIFO queue of generic items, supporting enqueue
and
dequeue
operations, along with methods for peeking at the first item,
This implementation uses a resizing array, which doubles the underlying array
when it is full and halves the underlying array when it is one-quarter full.
The enqueue
and dequeue
operations take constant amortized time.
The size
, peek
, and isEmpty
operations take
constant time in the worst case.
Iteration takes time proportional to the number of items.
Adapted from the book Algorithms 4 by R. Sedgewick and K. Wayne.
- See also
Section 1.3 of Algorithms, 4th Edition
Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne, Addison-Wesley Professional, 2011, ISBN 0-321-57351-X. http://algs4.cs.princeton.edu
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def
dequeue(): A
Removes and returns the item on this queue that was least recently added.
Removes and returns the item on this queue that was least recently added.
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first item of this queue
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iterator: Iterator[A]
Returns an iterator that iterates over the items in this queue in FIFO order without consuming them.
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peek: A
Returns the item least recently added to this queue without consuming it.
Returns the item least recently added to this queue without consuming it.
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first item of this queue
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toString(): String
Returns a string representation of this queue without consuming it.
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transpose
throws anIllegalArgumentException
if collections are not uniformly sized.
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