# File lib/rubygems/indexer.rb, line 495
  def compact_specs(specs)
    names = {}
    versions = {}
    platforms = {}

    specs.map do |(name, version, platform)|
      names[name] = name unless names.include? name
      versions[version] = version unless versions.include? version
      platforms[platform] = platform unless platforms.include? platform

      [names[name], versions[version], platforms[platform]]
    end
  end