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comp.lang.ruby

Count uniques ?

Adriano Lul

4/28/2008 11:53:00 AM

I need to know how I use the count function to have a sum of days
ie: I have several transactions in several days like hmmm Tasks
Task -> id, price, day , description

so in every day I did some tasks
I sum them with the Task.sum(:price)
but I want to do an automatized way to have an average description (sum
/ days )
how can I do it ?
ps: day is datetime ...
--
Posted via http://www.ruby-....
1 Answer

Roger Pack

4/28/2008 4:22:00 PM

0

You can substract datetimes to get the difference between them in seconds.
Time.now - Time.now
Use that to average?

On Mon, Apr 28, 2008 at 5:53 AM, Adriano Lul <adrianod@gmail.com> wrote:
> I need to know how I use the count function to have a sum of days
> ie: I have several transactions in several days like hmmm Tasks
> Task -> id, price, day , description
>
> so in every day I did some tasks
> I sum them with the Task.sum(:price)
> but I want to do an automatized way to have an average description (sum
> / days )
> how can I do it ?
> ps: day is datetime ...
> --
> Posted via http://www.ruby-....
>
>