Anonymize strings

gistfile1.rb

def anonymize(value, options={})
  options[:percent] ||= 0.6
  options[:percent]   = options[:percent] * 0.01 if options[:percent] > 1
  options[:char]    ||= '*'

  value_length      = value.split( options[:split_by] ).first.length if options[:split_by]
  value_length    ||= value.length
  obfuscated_length = ( value_length * options[:percent] ).floor
  start_at          = (( value_length - obfuscated_length) / 2).ceil - 1

  value.sub(value[start_at..(obfuscated_length)], options[:char] * obfuscated_length)
end