"In files published for Flash Player 6 or earlier, the value of
String(undefined) is "" (an empty string). In files published for Flash
Player 7 or later, the value of String(undefined) is "undefined"
(undefinedis converted to a string)."
Why convert 'undefined' to a string? When is that useful?
When is it *not* useful? When you're being too lazy to check your values
to ensure they are set before using them? If a variable is undefined and you
trace it, nothing gets traced. The implicit toString needs to be "undefined"
in order to be useful, and you should be testing for ==undefined before you
use it instead of relying on the boolean comparison to allow it to fall
through the cracks. What happens if the comparison changes in future
players?
ryanm
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