Routing Code - question

rubyonrails-core
1

In routing.rb, what is the purpose of the following piece of code:

class Regexp #:nodoc:   def number_of_captures     Regexp.new("|#{source}").match('').captures.length   end

Does this method not always return 0? It's always going to match '' with the blank spot before the | and therefore will have no captures.

2

Regexp.new("|(.)").match("a").captures.length

=> 1

3

Just responding to see KC's response since Google Groups is borked and not showing the last response in each thread.