From: Florian Frank <flori@...>
Date: 2004-11-01T14:10:14+09:00
Subject: Re: Nuby Tip for the Day : Memoization

On 2004-11-01 12:58:27 +0900, John Carter wrote:
> Really an easy optimization to do.

Yep. You could also make it transparent for the clients of your class:

class BigExpensiveMadeOften
  def initialize(unique_name)
    # Big expensive computation
  end

  @@memo = Hash.new { |hash,key|
    result = BigExpensiveMadeOften.allocate
    result.__send__(:initialize, key)
    hash[key] = result
  }

  def BigExpensiveMadeOften.new(unique_name)
    @@memo[unique_name]
  end
end

foo = BigExpensiveMadeOften.new('foo')
bar = BigExpensiveMadeOften.new('bar')
p foo
p bar
foo = BigExpensiveMadeOften.new('foo')
p foo

-- 
Florian Frank