On Feb 11, 2007, at 10:52 AM, Mark Wieder wrote:
Trevor-
Saturday, February 10, 2007, 10:24:07 AM, you wrote:
variable. For example, if you do this:
on mouseUp pMouseBtnNo
put revXMLNodeContents(theNonExistentXMLTreeID,"no node") into
theContent
put it & cr & theContent
end mouseUp
Actually, that's not valid syntax. You'll get a compiler error if you
turn on explicitVars.
Right. But the purpose of the above snippet was not to demonstrate
explictVars safe code, but rather that:
"The rev externals do return the error string as the result of the
function but they don't explicitly store any value in the "it"
variable".
If they did then the variable "it" would hold an empty value.
There's no "it" variable at the time you try to
display it because you've explicitly put the value into theContent.
Try this instead:
on mouseUp pMouseBtnNo
local theNonExistentXMLTreeID
get revXMLNodeContents(theNonExistentXMLTreeID, "no node")
put it & cr & the result
end mouseUp
Now I get the following:
xmlerr, bad document id
xmlerr, bad document id
So both "it" and "the result" contain the error message which doesn't
help. What I am after in my code is a variable (or function) that
can always be used to determine if an error occurred. It will always
return empty if no error occurred and will hold an error string if
one did occur. I want to do this without requiring a specific syntax
when calling functions. Using "it" (for the returned value) and "the
result" (for the error string) only works if a certain syntax is used.
--
Trevor DeVore
Blue Mango Learning Systems - www.bluemangolearning.com
[EMAIL PROTECTED]
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