A deque, short for "double-ended queue," is a versatile data structure in the C++ Standard Template Library (STL). It allows for efficient insertion and deletion of elements at both the front and back ends.

I need a queue which multiple threads can put stuff into, and multiple threads may read from. Python has at least two queue classes, queue.Queue and collections.deque, with the former seemingly usi...

Deque<Integer> stack = new ArrayDeque<>(); I definitely do not want synchronized behavior here as I will be using this datastructure local to a method . Apart from this why should I prefer Deque over …

Jul 31, 2016 · A deque is a generalization of stack and a queue (It is short for "double-ended queue"). Thus, the pop () operation still causes it to act like a stack, just as it would have as a list.

Feb 12, 2015 · Updated based on the Answers below: It appears that the way deque is usually implemented is a variable size array of fixed size arrays. This makes growing faster than a vector …

May 6, 2014 · In python docs I can see that deque is a special collection highly optimized for poping/adding items from left or right sides. E.g. documentation says: Deques are a generalization of …

Dec 10, 2015 · Check out collections.deque. From the docs: Deques support thread-safe, memory efficient appends and pops from either side of the deque with approximately the same O (1) …

Aug 29, 2015 · In deque (double-ended queue) The element can be inserted from the back and removed from the rear (like in stack), but queue only allows removal from the front.

Sep 16, 2009 · Deque: Any insertion or deletion of elements other than at the beginning or end invalidates all pointers, references, and iterators that refer to elements of the deque. List: Inserting …

A deque is more efficient for pushing and popping from the ends. Read on, and below the list of methods you'll find: Indexed access is O (1) at both ends but slows to O (n) in the middle. For fast random …