On 4/19/06, Nathan Olberding <nathan.olberding / gmail.com> wrote:> I think I've found a gotcha. Really, it should be expected behavior, but> it wasn't immediately obvious to me, so I thought it's at least worth> mentioning.>> Let's say you want to iterate through an array and delete any items in> that array that match a certain criteria. I thought it'd make sense to> do this:>> items.each do |x|>         if x == "">                 items.delete(x)>         end> end>>> If items.each referred to items[] by reference, this would make sense.> But since it references by value, you're literally changing the array> live, as you're iterating through it. This means that, if you delete an> item in mid-iteration, you change the index of items[]. Since you> deleted something, you skip the next item.>> 1) Do I have this right?>> 2) Am I right in assuming that it's possible to create an infinite loop> this way by continually push()ing things on to items[]?
Except the reference/value thing.
Look at Array#delete_if for your specific example.
-austin--Austin Ziegler * halostatue / gmail.com               * Alternate: austin / halostatue.ca