Parse the strings, transform them into DateTime objects, create DateTime::Span objects from the usage times and then use the intersection() method on the usage times, passing them a span covering a particular weekday.

The data format is somewhat ambiguous, though: What does it look like if someone stays logged in for three days? Three years? Is it safe to assume the start/end dates are in the current year?

In reply to Re: total time usage by day with last by saintmike
in thread total time usage by day with last by Anonymous Monk

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