code: function stringEscape (str) {
  
    let stringArray = str.toString().split('');
  
    for (let j = 0; j < stringArray.length; j++) {
      for (let i = 0; i < escapeArray.length; i++) {
  
        if (stringArray[j] === escapeArray[i]) {
          stringArray[j] = '\\' + escapeArray[i];
        }
  
      }
    }
  
    return stringArray.join('');
  }
docs: The string that needs to be matched is escaped