Introducing the Rexslt gem

require 'rexslt'


xsl =<<XSL
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

  <xsl:template match="game">
    <xsl:apply-templates select="memory"/>
  </xsl:template>

  <xsl:template match="memory">
    <xsl:value-of select="digits"/>
  </xsl:template>

</xsl:stylesheet>
XSL

xml = "
<game>
  <memory><digits>123</digits></memory>
  <memory><digits>111</digits></memory>
</game>"

puts Rexslt.new(xsl, xml).to_s