Share simple code if someone needs it (moving the last array index to the top). For example:
1,2,3,4,5,6 became 2,3,4,5,6,1
2,3,4,5,6,1 became 3,4,5,6,1,2
and so on.
I made it for my own project, maybe someone else finds it helpful 
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Array → Get Index (0) → Set to Temp Var → Array → Add (Temp Var) → Array → Remove Index (0)
BTW, if any documentation editors are reading this, there are a lot of undocumented Array functions available to Blueprints.
I had thought there were Pop/Push/Shift/Unshift, but I’m not seeing them anywhere.
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That’s why I sharing my way solution here: BP system is functionally limited. And thanks for your code share too .
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