From: Ryan Davis <ryand-ruby@...>
Date: 2009-09-30T12:02:02+09:00
Subject: Re: syntax translation Java - Ruby


On Sep 29, 2009, at 09:24 , Jake Brightmatter wrote:

> have this code in Java:
>
> boolean monkey = true;
> for(i=0; monkey; i++){
>  if(index[i] == null) {
>    put.something.new(i);
>    break;
>  }
> }
>
> I am aware that it makes no sense by itself so I will explain.  I am
> iterating through a (Sequel) database nodes.  I am looking for a node
> I.D. that is not being used.  Basically, I am looking for and open
> parking spot.  When I find one, I insert my new data using the newly
> found parking spot. I really can't figure out why I need to uniquely
> identify each node by an I.D. as it is already uniquely identified by
> location in the tree but that is a different matter entirely.  All I
> need is how to write a nice infinite 'for' loop in Ruby.

No, that's what you THINK you want because you're coming from java...

index is a bad name for a collection, so I'm going to call it  
parking_spots.

parking_spots.each_with_index do |parking_spot, i|
   next if parking_spot
   parking_spots[i] = my_car
   break
end

but honestly if you're doing this against a sequel db, you're it  
wrong. You should use the power of the DB instead of doing tons of  
roundtrips in ruby.