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dequer: An R 'Deque' Container

Offers a special data structure called a 'deque' (pronounced like 'deck'), which is a list-like structure. However, unlike R's list structure, data put into a 'deque' is not necessarily stored contiguously, making insertions and deletions at the front/end of the structure much faster. The implementation here is new and uses a doubly linked list, and whence does not rely on R's environments. To avoid unnecessary data copying, most 'deque' operations are performed via side-effects.

dequer.pdf