I have feeling that there must be one liner or some simple way to do this:
...
has_many :items
...
def items_value
value = 0
items.each { |item| value += items.value }
value
end
Any ideas.
Thanks,
Igor.
items.inject { |value, item| value + item.value }
Chris
On 11/4/05, Igor Anic <ianic-eC0b4XhvfLY@public.gmane.org>
wrote:> I have feeling that there must be one liner or some simple way to do this:
>
> ...
> has_many :items
> ...
> def items_value
> value = 0
> items.each { |item| value += items.value }
> value
> end
>
>
> Any ideas.
> Thanks,
> Igor.
>
>
>
>
>
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
Actually, that should probably be:
items.inject(0) { |value, item| value + item.value }
Chris
On 11/4/05, Chris McGrath
<c.r.mcgrath-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> items.inject { |value, item| value + item.value }
>
> Chris
>
> On 11/4/05, Igor Anic <ianic-eC0b4XhvfLY@public.gmane.org> wrote:
> > I have feeling that there must be one liner or some simple way to do
this:
> >
> > ...
> > has_many :items
> > ...
> > def items_value
> > value = 0
> > items.each { |item| value += items.value }
> > value
> > end
> >
> >
> > Any ideas.
> > Thanks,
> > Igor.
> >
> >
> >
> >
> >
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
Check out the count method at http://api.rubyonrails.com/classes/ActiveRecord/Base.html#M000694 Warmest regards, Nathan. -------------------------------------------------------------- Nathaniel S. H. Brown Toll Free 1.877.4.INIMIT Inimit Innovations Phone 604.724.6624 www.inimit.com Fax 604.444.9942> -----Original Message----- > From: rails-bounces-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > [mailto:rails-bounces-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org] On Behalf Of Igor Anic > Sent: November 4, 2005 2:35 AM > To: Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > Subject: [Rails] one liner? > > I have feeling that there must be one liner or some simple > way to do this: > > ... > has_many :items > ... > def items_value > value = 0 > items.each { |item| value += items.value } > value > end > > > Any ideas. > Thanks, > Igor. > > > > > > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
Thanks Chris, that was really fast reply, works great. Chris McGrath wrote:> Actually, that should probably be: > > items.inject(0) { |value, item| value + item.value } > > Chris > > On 11/4/05, Chris McGrath <c.r.mcgrath-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > >>items.inject { |value, item| value + item.value } >> >>Chris >> >>On 11/4/05, Igor Anic <ianic-eC0b4XhvfLY@public.gmane.org> wrote: >> >>>I have feeling that there must be one liner or some simple way to do this: >>> >>>... >>> has_many :items >>>... >>> def items_value >>> value = 0 >>> items.each { |item| value += items.value } >>> value >>> end >>> >>> >>>Any ideas. >>>Thanks, >>>Igor. >>> >>> >>> >>> >>> >>>_______________________________________________ >>>Rails mailing list >>>Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org >>>http://lists.rubyonrails.org/mailman/listinfo/rails >>> >> > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails > >