re = /<table\b[^\>]*\bname=(\"|')?table01\1[^\>]*>(?>([^\<]+|<(?!\/?table\b))|(<table[^\>]*>(?:(?2)|(?3)|)+?<\/table>))*<\/table>/ix
str = '<table name="table01" data-measure-unit="Y">
<table></table>
</table>
<table name="table01" data-measure-unit="Y">
<div>
<table></table>
</div>
</table>
<table name="table01" data-measure-unit="Y">
<div>
<table>
<table>
</table>
</table>
</div>
</table>
<table name="table01" data-measure-unit="Y">
<div>
<div></div>
</div>
</table>
<table name="table01" data-measure-unit="Y">
</table>
<table name="table01"></table>'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html