From: Chris Howe <chris@...>
Date: 2009-07-17T14:48:50+09:00
Subject: Re: how to know Array if have key?

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If you have a hash and you want to find whether or not a given value exists
as a key you can use the "has_key?" method

   h = { "a" => 100, "b" => 200 }
   h.has_key?("a")   #=> true
   h.has_key?("z")   #=> false

On Fri, Jul 17, 2009 at 12:09 PM, Zhenning Guan <g.zhen.ning@gmail.com>wrote:

>  a_array= [{"1"=>"11"}, {"2"=>"22"}]
> how to test if a_array have a key "11"????
> --
> Posted via http://www.ruby-forum.com/.
>
>

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