re = /([01][0-9]|2[0-3]):[0-5][0-9]
/mi
str = '20:59
00:59
01:01
10:30
00:00
24:59
30:01
00:60
05:122
'
# 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