From: Sukhwinder Tambar <princetambar@...>
Date: 2009-04-15T18:51:50+09:00
Subject: Re: how to sort my hash

Brian Candler wrote:
> Sukhwinder Tambar wrote:
>> this is my hash .. i want to sort this by 'business_continuity'
> 
> Actually it's an Array.
> 
> Both Hash and Array are Enumerable, and Enumerable has sort_by method.
> 
>   work_orders = work_orders.sort_by { |e| e.business_continuity }
> 
> However, false and true are not comparable, so you need to substitute 
> some values which do. For example, if you want false to sort before 
> true, then:
> 
>   work_orders = work_orders.sort_by { |e| e.business_continuity ? 1 : 0 
> }
> 
> If it's really a hash of key=>record, then
> 
>   my_hash.sort_by { |k,v| v.business_continuity ? 1 : 0 }



i try my_hash.sort_by { |k,v| v.business_continuity ? 1 : 0 }

this give me following error

merb : worker (port 4000) ~ undefined method `business_continuity' for 
nil:NilClass - (NoMethodError)
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