From: Li Chen <chen_li3@...>
Date: 2006-12-26T03:51:19+09:00
Subject: Strange about Array#each_index

Hi all,

Happy holidays!


I query Ruby about Array#each_index and here are what Ruby returns:

--------------------------------------------------- Array#each_index
 array.each_index {|index| block }  ->  array
--------------------------------------------------------------------
 Same as +Array#each+, but passes the index of the element instead
 of the element itself.

    a = [ "a", "b", "c" ]
    a.each_index {|x| print x, " -- " }

 produces:

    0 -- 1 -- 2 --


According to the above Array#each_index will return only the index for
each element: 0,1,2.

But when I paste the codes and run on my XP I find Ruby returns both
indexes and values. Do I miss something?

Thanks,

Li

###

C:\>irb
irb(main):001:0> a = [ "a", "b", "c" ]
=> ["a", "b", "c"]
irb(main):002:0> a.each_index {|x| print x, " -- " }
0 -- 1 -- 2 -- => ["a", "b", "c"]
irb(main):003:0>

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