Hi Vlastimil. I used indices because I need the i-th argument and also the i+1-th argument at the same time. shift throws away earlier arguments. There might be a way to refactor it, which I would love to see.
I use exit codes to indicate the status of the method -- i.e. 0 if everything went fine, 1 if there was an error, etc. I also use echo to print strings meant to be "returned" from the functions. See above!
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