Check if a string is empty in action script, similar to String.Empty in .net

Question

Is there a static property in Action similar to that in the String object in .net to check if a string is empty, that is String.Empty.

Thanks

Answer 1

The following will catch all of these:

1. NULL
2. empty string
3. whitespace only string

---

import mx.utils.StringUtil;

var str:String

if(!StringUtil.trim(str)){
   ...
}

Answer 2

You can simply do:

if(string) 
{
    // String isn't null and has a length > 0
}
else
{
   // String is null or has a 0 length
}

This works because the string is coerced to a boolean value using these rules:

String -> Boolean = "false if the value is null or the empty string ( "" ); true otherwise."