From: "ara.t.howard" <ara.t.howard@...>
Date: 2008-05-07T23:51:44+09:00
Subject: Re: idiom for Hash like map...


On May 7, 2008, at 5:18 AM, Mikel Lindsaar wrote:
> class Fruit
>  attr_accessor :name, :price
>  def initialize(args)
>    @name = args[:name]
>    @price = args[:price]
>  end
> end
>
> array = [ Fruit.new(:name => "apple", :price => 2),
>          Fruit.new(:name => "grape", :price => 20),
>          Fruit.new(:name => "pear",  :price => 200) ]
>
> hash = Hash.new
>
> array.each do |obj|
>   hash.merge!({obj.name => obj.price})
> end
>
> hash.inspect # => "{\"grape\"=>20, \"apple\"=>2, \"pear\"=>200}"
>
>
>
> The "hash = {} / hash.merge!" thing bugs me... what is the better way?
>

class Fruit
   def to_hash
     { :name => name, :price => price }
   end
end

array.each{|fruit| hash.update fruit.to_hash}

a @ http://codeforpeople.com/
--
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better. simply reflect on that.
h.h. the 14th dalai lama