Comments on Flex and the City: On using "if(foo)" vs "if(foo != null)"

@Stas - you're right, cheers!

2009-03-19T08:18:00.000+10:00

@Stas - you're right, cheers!

I think "if (myInstance)" should be changed to "...

2009-03-19T03:15:00.000+10:00

I think "if (myInstance)" should be changed to "if (usefulObject)"?

I think another thing to consider are E4X XMLList ...

2009-03-19T01:12:00.000+10:00

I think another thing to consider are E4X XMLList objects. When empty, they have a value of undefined, though their Boolean conversion (used in if statements) still returns true. So:

trace(Boolean(new XMLList())); // true
trace(new XMLList() == undefined); // true

They can both exist or not exist depending on how you write your condition.