re = /.{10,20}?([\w.]+).{10,20}word_to_match.{0,15}/
str = '<span data-attr="something" attr1="" ><i>other_word</i></span>
<span data-attr="required" attr1="" ><i>word_to_match</i></span>
<span data-attr="something1" attr1="" ><i>some_other_word</i></span>'
# Print the match result
str.match(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