Re: [Rails] Re: checking arrays if exist efficiently

Pry Flack <lists@ruby-forum.com> wrote:
> Soichi Ishida wrote in post #1112146:
> > Rails 4.0.0
> > Of course, I can loop through all elements like
> >
> > Info.all.each do | i |
> > if i == ... then
> > Info.create(... => i)
> > end
> > end
> >
> > But it seems inefficient.
> >
> > Is there better ways or gems that do the job I am looking for?
> >
> > soichi
>
> Not sure I understand fully your problem.
>
> Maybe use find_in_batches ?
> http://api.rubyonrails.org/classes/ActiveRecord/Batches.html
>
> or find_and_create_by_column_name ?
> http://api.rubyonrails.org/classes/ActiveRecord/Base.html

It's also not clear to me what you're doing with the items. From your
snippet of pseudocode, you want to *create* a *new* item with the
matching item when you find a match??

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