akr	2010-03-12 23:00:49 +0900 (Fri, 12 Mar 2010)

  New Revision: 26892

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=26892

  Log:
    rdoc update.

  Modified files:
    trunk/enum.c

Index: enum.c
===================================================================
--- enum.c	(revision 26891)
+++ enum.c	(revision 26892)
@@ -2418,15 +2418,18 @@
  *
  *  If the block needs to maintain state over multiple elements,
  *  local variables can be used.
- *  For example, monotonically increasing elements can be chunked as follows.
+ *  For example, three or more consecutive increasing numbers can be squashed
+ *  as follows:
  *
- *    a = [3,1,4,1,5,9,2,6,5,3,5]
- *    n = 0
- *    p a.slice_before {|elt|
- *      prev, n = n, elt
- *      prev > elt
- *    }.to_a
- *    #=> [[3], [1, 4], [1, 5, 9], [2, 6], [5], [3, 5]]
+ *    a = [0,2,3,4,6,7,9] 
+ *    prev = a[0]
+ *    p a.slice_before {|e|
+ *      prev, prev2 = e, prev
+ *      prev2 + 1 != e
+ *    }.map {|es|
+ *      es.length <= 2 ? es.join(",") : "#{es.first}-#{es.last}"
+ *    }.join(",")
+ *    #=> "0,2-4,6,7,9"
  *
  *  However local variables are not appropriate to maintain state
  *  if the result enumerator is used twice or more.

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