Can a hash be used for more than just one key/value pair?

Yes it can and typically does.

You might want to consider using a hash like this to store your point coordinates: 

{
    x => 0,
    y => 0,
    z => 0,
    seq_no => N,
}

[download]

-- Ken

In reply to Re: Managing structured data by kcott
in thread Managing structured data by salp

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