re = /\[(?:[a-zA-Z0-9]{0,4}:?){1,8}\]|\[(?:[a-zA-Z0-9]{0,4}:?){1,4}(?:[0-9]{1,3}\.){3}[0-9]{1,3}\]/
str = '[::1]
[:a:1]
[:bh:lh:1]
[1:1:fEd1:1:abdc:1]
[::ffff:192.0.2.128]
[0000:0000:0000:0000:0000:0000:0000:0001]
[2001:0db8:0000:0000:0000:ff00:0042:8329]
[2001:db8:0:0:0:ff00:42:8329]
[2001:db8::ff00:42:8329]
[2001:0db8:0000:0000:0000:ff00:0042:8329]'
# 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