Flash
 ActionScript

     

I am trying to write out a RegExp pattern to validate an e-mail. I have googled but can’t seem to find a definite answer but what characters/symbols are not allowed in a valid email address?

Is RegExp the way to go to validate an email format? I started off using the below way, but then started looking into RegExp:

[AS]
function validateEmail( email:String ):Boolean
{
  var i:int = -1;
  var n:int = email.length;
 
  if( n <= 6 )
  {
      return false;
  }

  var invalidChar:String = “~^*|,\”:<>[]{}`\’;()&$#%”;
 
  while( ++ i < n )
  {
      if( invalidChar.indexOf( email.charAt( i ) ) != -1 )
      {
        return false;
      }
  }
 
  return true;
}
[/AS]

  4 REPLIES
 
Isocase Author 
1  
Isocase

Did some research and I was finally able to find information on wikipedia. Here is the URL if anyone ever needs to know this information

http://en.wikipedia.org/wiki/E-mail_address

  • 18 February 2008 04:08 PM
    •  
Fernando
2  
Fernando

[as]function isValidEmail(email:String):Boolean {
  var emailExpression:RegExp = /^[a-z][\w.-]+@\w[\w.-]+\.[\w.-]*[a-z][a-z]$/i;
  return emailExpression.test(email);
}[/as]

[as]trace (isValidEmail(“user@ultrashock.com”)); // true
trace (isValidEmail(“test@@tester.com”)); // false[/as]

  • 18 February 2008 05:52 PM
    •  
Isocase Author 
3  
Isocase

Thanks Fernando

I was wondering and did some research but couldn’t find the answer I was looking for. In AS3 how processor intensive is using RegExp compared to using substring or something like that.

Example:

Lets say I am building a form and I want to remove white space after the subject. Would it be best to use a RegExp or just loop through the string until it finds the space then use substring to shorten?

  • 20 February 2008 06:50 PM
    •  
Fernando
4  
Fernando

RegExp is a hell lot faster than a substring way of doing smth.

  • 20 February 2008 07:19 PM
    •