once someone pushed this code into my Repo. The WORST function ever written omg :D

 function evalBool(str){
      if( str[0] === 't' &&
          str[1] === 'r' &&
          str[2] === 'u' &&
          str[3] === 'e' 
        ){
        return true;
      }

      if( str[0] === 'f' &&
          str[1] === 'a' &&
          str[2] === 'l' &&
          str[3] === 's' &&
          str[4] === 'e' 
        ){
        return false;
      }

      if( str[0] === 'n' &&
          str[1] === 'u' &&
          str[2] === 'l' &&
          str[3] === 'l' 
        ){
        return null;
      }

      return undefined;

    }