From: Patrick Doyle <wpdster@...>
Date: 2008-12-24T01:51:19+09:00
Subject: Loading up a hash with variables if they are defined

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Is there a cleaner, more Rubyesque way to do this?

  # Return a hash of the navigation parameters
  def nav_params
    params = {}

    params[:prefix]      = @prefix      if @prefix
    params[:category_id] = @category_id if @category_id
    params[:page]        = @page        if @page

    params
  end

I want to load a parameters hash with the contents of some instance
variables, but only if they are defined.

--wpd

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