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

actionscript-3 apache-flex actionscript
Hassan Mokdad picture Hassan Mokdad · Feb 18, 2012 · Viewed 16.5k times · Source

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

Richard Walton picture Richard Walton · Feb 18, 2012

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."

Related questions

What is the best way to get the minimum or maximum value from an Array of numbers?

Let's say I have an Array of numbers: [2,3,3,4,2,2,5,6,7,2] What is the best way to find the minimum or maximum value in that Array? Right now, to get the maximum, I am looping through the Array, and resetting a variable to …

Read More
How to deal with Number precision in Actionscript?

I have BigDecimal objects serialized with BlazeDS to Actionscript. Once they hit Actionscript as Number objects, they have values like: 140475.32 turns into 140475.31999999999998 How do I deal with this? The problem is that if I use a NumberFormatter with precision of 2, …

Read More
For VS Foreach on Array performance (in AS3/Flex)

Which one is faster? Why? var messages:Array = [.....] // 1 - for var len:int = messages.length; for (var i:int = 0; i < len; i++) { var o:Object = messages[i]; // ... } // 2 - foreach for each (var o:Object in messages) { // ... }

Read More