Edit: Deque

Deque is an ad hoc example by Christopher Diggins for a concatenative language that is not a stack language. It uses a [[http://en.wikipedia.org/wiki/Deque]] instead. To quote from his [[https://narkive.com/nFIBJsI4.3|message to the concatenative mailing list]]: Allow me to present the deque language that I just made up. 1! - Pushes a one to the right of the deque !1 - Pushes a one to the leftt of the deque ... add! - Adds the right two numbers of the deque !add - Adds the left two numbers of the deque ... 3! !5 !2 sub! !add If applied to an empty deque this will leave the value 4 on the deque.

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