You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jaro_winkler.rb
    path of file: ./repos/did_you_mean/lib/did_you_mean
    
    the code of the file until where you have to start completion: module DidYouMean
  module Jaro
    module_function

    def distance(str1, str2)
      str1, str2 = str2, str1 if str1.length > str2.length
      length1, length2 = str1.length, str2.length

      m          = 0.0
      t          = 0.0
      range      = (length2 / 2).floor - 1
      range      = 0 if 
    
    def distance(str1, str2)
      str1, str2 = str2, str1 if str1.length > str2.length
      length1, length2 = str1.length, str2.length

      m          = 0.0
      t          = 0.0
      range      = (length2 / 2).floor - 1
      range      = 0 if range < 0
      flags1     = 0
      flags2     = 0

      # Avoid duplicating enumerable objects
      str1_codepoints = str1.codepoints
      str2_codepoints = str2.codepoints

      i = 0
      while i < length1
        last = i + range
        j    = (i >= range) ? i - range : 0

        while j <= last
          if flags2[j] == 0 && str1_codepoints[i] == str2_codepoints[j]
            flags2 |= (1 << j)
            flags1 |= (1 << i)
            m += 1
            break
          end