re = /^(chr)?(1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|X|Y)((:|\s+)\d+((-|\s+)\d+((_|\s+)[ACGT]+((\/|\s+)[ACGT]+)?)?)?)?$/i
str = '11 12345 54321 a t'
# 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