From: Ryan Davis <ryand-ruby@...>
Date: 2011-09-02T05:32:46+09:00
Subject: Re: help on find over find


On Sep 1, 2011, at 11:31 , Mauricio Alcayaga wrote:

> @activityPeriods = coleccion.map{ |x| [x.date_created.year, 
> x.date_created.month] }.uniq
> 
> as you can see, I'm getting an array of two columns [years, months] 
> extracted from a collection's (named "coleccion") asking over the field 
> "date_created"
> 
> question: do you know a way, using similar structure, to introduce a 
> variable as field name to generate the response ? , I mean in te way of:
> 
> @activityPeriods = coleccion.map{ |x| [x.VARIABLEFIELDNAME.year, 
> x.VARIABLEFIELDNAME.month] }.uniq

I'm not sure I entirely understand your question... but I think you want to look at Object.send.