From: Reginald Tan <redge.tan@...>
Date: 2011-04-27T10:34:05+09:00
Subject: including Enumerable in PStore

Hi guys. I want my PStore to act more like a Hash. Basically I want to
add "map" functionality to it. For a regular hash, you can do the
following:


  h = {0 => "sword", 5 => "hammer", 3 => "arrow"}
  puts h.map{ |x| x[0]}.max   # gives the highest key which is 5



I want pstore to be able to do same thing. I've included Enumerable but
I do have to implement the each method which I dont know how to go
about. Any suggestions? Thanks

  class PStore
    include Enumerable
    def each &block

    end
  end

  p = PStore.new("temp.store")
  p.transaction do
    p[0] = "sword"
    p[1] = "hammer"
    p[2] = "arrow"
  end

  p.transaction do
    puts p.map{|x| x[0]}.max # wont work yet
  end

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