Trim a string

ctrim.js

  /**
   * A simple function that creates a new string from inputStr and removes bot  h      * leading and trailing sep strings.
   * @param {String} inputStr The string to be trimmed.
   * @param {String} sep The separator string to be trimmed.
   * @private
   */
  function ctrim(inputStr, sep) {
      var str = String(inputStr);
      var regExpStr = '^'+sep+'+|'+sep+'+$';
      console.log('sep ',sep);
      console.log('str - 1',str,regExpStr);
      var rExp = new RegExp(regExpStr, 'gm');
      str.replace(rExp, '');
      console.log('str - 2',str);
      return str;
  }