An example of a commented regex block encapsulated in a method.

commented_regex.rb

def email_pattern
  %r{
    ^[A-Z0-9._%+-]+   # Beginning with one or more valid characters (letters, numbers, period, etc.)
    @                 # A literal "at" sign
    [A-Z0-9.-]+       # One or more letters, numbers, period, or dash
    \.                # A literal period
    [A-Z]{2,4}$       # Ending with a two to four character text domain extension
  }ix                 # Flags: Ignore whitespace and ignore letter case
end

'[email protected]'.match(email_pattern) # => #<MatchData "[email protected]">
'[email protected]'.match(email_pattern) # => #<MatchData "[email protected]">
'planningcenteronline.com'.match(email_pattern) # => nil

def regex
  %r{
    \d4^             # FREAKING MAGIC I DONT KNOW
  }ix
end