Introduction with Sample Code: Iterator


Iterator is a method to iterate over items.

      ary.each {|item|
        print item
      }
      list.each {|item|
        print item
      }
VS
      for (i=0; i<ary.size; i++) {
         print ary[i]
      }
      for (i=list; list; list=list.next) {
         print list.value
      }