Redefining a DS

Okay, chalk this up to I'm an old fart and can't remember how to do this,
although I know I've done it in the past.

I have an array of 10 elements. I want to move #9 to #10, #8 to #9, etc. I
can write code that does that. In talking over this with a friend today he
suggested moving the array to a data structure, redefining it, and moving
all but 1 element back to the array. "Pretty smart", I said. Now I wish
I'd said "hey, can you send me an example of how you do that?"

Could one of you young whipper-snappers post the way the DS should be
coded? TIA.


Jim Newman