+1 Also had the need for something like this in the past.
Object#presence won't cut it when you're short-circuiting some part of computation inside of the chained calls, for example this @users.send(@admins_only ? :select : :presence, &:admin?).sort will fail when @users array is blank. Also isn't this function sort of OO version of http://en.wikipedia.org/wiki/Identity_function ? Btw. the use cases like this could be made even simpler by adding/using Object#send_if @users.send_if(@admins_only, :select, &:admin?).sort And it looks like people have been doing this for quite a while already :) http://www.google.com/codesearch?q=lang%3Aruby+def%5Cssend_if On Apr 11, 1:17 am, Josh Susser <j...@hasmanythrough.com> wrote: > On Apr 9, 2010, at 4:26 AM, Joao Carlos wrote: > > > > > > > I just came across a situation where it would be extremely handy to > > have a method that returns the receiver. > > > Imagine the following example: > > > filter = %w(with_votes without_votes).include?(params[:filter]) ? > > params[:filter].to_sym : :self > > Idea.published.send(filter).all > > > The implementation would be pretty simple: > > > class Object > > def self > > self > > end > > end > > > Should this be a part of Rails? > > (somehow managed to forget to hit send on this one yesterday. sigh.) > > Smalltalk has a method Object#yourself which does just that. The most > common use case is with cascaded message sends, but Ruby doesn't have > those. I've wanted #yourself in Ruby now and then too. Since Matz > was very familiar with Smalltalk when he created Ruby I assume he > didn't think it was necessary, but it's one of the questions I always > want to ask him but forget to when I get the chance. > > -- > Josh Susserhttp://blog.hasmanythrough.com -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To post to this group, send email to rubyonrails-c...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-core+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-core?hl=en.
