[](https://www.npmjs.com/package/@zimtsui/deque)
npm install @zimtsui/deque
A double-ended queue with support for negative subscripts.
Why not petkaantonov/deque?
Because it returns undefined rather than throws when range errors occur, and it takes time of O(n) to get an iterator.
- push/pop/shift/unshift: amortized O(1)
- random access: O(1)
- get iterator: O(1)