From: Henry Maddocks <hmaddocks@...>
Date: 2012-11-30T08:04:59+09:00
Subject: Re: convert hash to array index value


On 30/11/2012, at 11:58 AM, rekha meena wrote:

> when we convert a hash to array.it takes one key value pair as a one
> argument
> and it gives the output as a key value pair..but if i give just index
> number and want output according to that it shows "nil" why???????
> 
> If it is working as an array then it should show me some value regarding
> the index number..
> Please correct me if i am wrong!!!!!!


person.to_a returns a new Array, it doesn't convert person to an Array.

1.9.3p327 :001 > person = {'name'=>'jack','age'=>25,'city'=>'abc'}
 => {"name"=>"jack", "age"=>25, "city"=>"abc"} 
1.9.3p327 :002 > person.to_a
 => [["name", "jack"], ["age", 25], ["city", "abc"]] 
1.9.3p327 :003 > person
 => {"name"=>"jack", "age"=>25, "city"=>"abc"} 
1.9.3p327 :004 > person = person.to_a
 => [["name", "jack"], ["age", 25], ["city", "abc"]] 
1.9.3p327 :005 > person[1]
 => ["age", 25] 
1.9.3p327 :006 > person['name']
TypeError: can't convert String into Integer
	from (irb):6:in `[]'
	from (irb):6
	from /Users/henry/.rvm/rubies/ruby-1.9.3-p327/bin/irb:16:in `<main>'
1.9.3p327 :007 > 


Henry