I would just include date information in the timestamp. Any timestamp you get from a library will already have that information in it anyway.

The real question is, why are you doing this yourself. Surely, whatever language you use has a date comparison library and can handle this situation with a simple method. Reinventing the wheel, especially with a domain as intractable as dates and times, is a 'bad' idea.

Let us know what you come up with though.

Cheers,

Adam

https://twitter.com/varud

https://www.linkedin.com/in/adamcnelson

On Thu, May 2, 2013 at 8:54 AM, Bwana Lawi <mail2lawi@gmail.com> wrote:

Hi guys,

Programmers, what algorithm would you use to check that a given time (current timestamp in 24hr) is within a preset start and end times and if so, do specific stuff?

Scenario:

StartTime = 0600
EndTime = 1800

TimeNow = 0950

An algorithm like

If TimeNow >= StartTime and <= EndTime then allow

would work

However, this will not work if the Start/End time spans across 2 days:

StartTime = 1800
EndTime = 0600

TimeNow = 0550

Using the logic will fail yet 0550 is logically within the preset timeframe

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