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Re: [tlaplus] Beginner question about arrays


you'll find this easier to do with a sequence. Suppose your sequence is held in variable q, then you can write an action like

  /\ q # << >>
  /\ q' = Append(Tail(q), Head(q))

Moreover, an array (i.e., a function) with domain 1 .. N for some N \in Nat is just a sequence, so the same will work. If your array has a different domain, you'll have to write an explicit function definition, for which you may take inspiration from the definitions of Append, Tail, and Head in the standard Sequences module.


On 9 Oct 2018, at 17:09, nirr...@xxxxxxxxx wrote:

I'm very new to TLA+ and I've been trying to figure out if I can use arrays like a queue. Basically I want to move the first element of the array to the back then move everything forward one step. Like a queue were the first person in line went to the back.

Is this possible?

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