text: //
  //  NSString+Helper.h
  //
  //
  //  Created by Giuseppe Nucifora on 02/07/15.
  //  Copyright (c) 2015 Giuseppe Nucifora All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSString (Helper)
  
  - (BOOL) isValidEmail;
  
  - (BOOL) isNumeric;
  
  - (BOOL) isValidUrl;
  
  - (BOOL) isValidTaxCode;
  
  @end
  