[Rails] Re: group validation

3) If your timeStart and endTime are intended as "times in a day"
> and not an absolute time in history, you might use my 'relativity' gem
>
> https://github.com/petervandenabeele/relativity
>
> It also has a DayTimeRange that may be useful for what you are trying
> to do. If you use a standardized separator you could even write an
> equality or overlap comparator for DayTimeRange class.
>
> HTH,
>
> Peter

thank you it help me alot more power to us all

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