I think
null = explicity that the var points to nothing
and
undefined = never received any value or reference before
Perhaps before Flash 7 all the vars with no assignments were set to null by
default, I´m not sure....
2006/7/19, Rifled Cloaca <[EMAIL PROTECTED]>:
FlashCoders,
I've recently been upgrading some old Flash MX code to Flash 8, and have
been running into issues where properties return 'undefined' instead of
'null'. I seem to recall that undefined was introduced in Flash 7. I've
always been confused about when something is undefined versus null, so I
always check for both. { (var != undefined && var != null) }
Is there an explanation somewhere regarding the difference between
undefined
and null, and when to expect which? If not, can someone who understands
explain it?
Thanks in advance!
-rc
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