Heh...I already had written a script to do just this. I just had to change the name of mine to match what you were asking for. Now I get to see how much better I could have done it! :-)
I wish I could award bonus points for going straight to the shell for the answers.
Thank you, Christopher! Sometimes Python comes in handy.
And there it is in a single function. Nice!
Twins in a Window
Make one big string out of two smaller strings
Vectorize the digits of an Integer
Set a diagonal
Determine if input is a perfect number
TRON strategy toggle
Construct an index vector from two input vectors in vectorized fashion
Rotate input square matrix 90 degrees CCW without rot90
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