text: module.exports = function strncasecmp (argStr1, argStr2, len) {
    //  discuss at: http://locutus.io/php/strncasecmp/
    // original by: Saulo Vallory
    //    input by: Nate
    // bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
    //      note 1: Returns < 0 if str1 is less than str2 ; > 0
    //      note 1: if str1 is greater than str2, and 0 if they are equal.
    //   example 1: strncasecmp('Price 12.9', 'Price 12.15', 2)
    //   returns 1: 0
    //   example 2: strncasecmp('Price 12.09', 'Price 12.15', 10)
    //   returns 2: -1
    //   example 3: strncasecmp('Price 12.90', 'Price 12.15', 30)
    //   returns 3: 8
    //   example 4: strncasecmp('Version 12.9', 'Version 12.15', 20)
    //   returns 4: 8
    //   example 5: strncasecmp('Version 12.15', 'Version 12.9', 20)
    //   returns 5: -8
  
    var diff
    var i = 0
    var str1 = (argStr1 + '').toLowerCase().substr(0, len)
    var str2 = (argStr2 + '').toLowerCase().substr(0, len)
  
    if (str1.length !== str2.length) {
      if (str1.length < str2.length) {
        len = str1.length
        if (str2.substr(0, str1.length) === str1) {
          // return the difference of chars
          return str1.length - str2.length
        }
      } else {
        len = str2.length
        // str1 is longer than str2
        if (str1.substr(0, str2.length) === str2) {
          // return the difference of chars
          return str1.length - str2.length
        }
      }
    } else {
      // Avoids trying to get a char that does not exist
      len = str1.length
    }
  
    for (diff = 0, i = 0; i < len; i++) {
      diff = str1.charCodeAt(i) - str2.charCodeAt(i)
      if (diff !== 0) {
        return diff
      }
    }
  
    return 0
  }
  