def parse_query(s)
  if s.count(':') == 0
    return s
...

# Initial attributes Hash
# 
attributes = {
...

class PropertyGroups
  def self.from_xml(xml)
    document = Document.new(xml)
...

def check_user_agent
    if api_access?
      regex = Regexp.new("^([^/[:space:]]*)(/([^[:space:]]*))?([[:space:]]*\[[a-zA-Z][a-zA-Z]\])?[[:space:]]*(\\((([^()]|(\\([^()]*\\)))*)\\))?[[:space:]]*")
...

category_id = category_name.scan(/category-(\d+)/)[0][0]

/(?<part>(w(?!ww)|w(?=www)|w(?=[a-z0-9]+ww)|ww(?=[a-z0-9]+w)|www[a-z0-9]+|[a-vx-z0-9])[a-z0-9]*)\.example\.com/

/^(?:(\d)[ \-\.]?)?(?:\(?(\d{3})\)?[ \-\.])?(\d{3})[ \-\.](\d{4})(?: ?x?(\d+))?$/

# expanded version w/ comments
...

require 'net/http'
require 'uri'
require 'strscan'
...