problem with part(expr,i)

• Subject: problem with part(expr,i)
• From: Valerij Pipin
• Date: Tue, 17 Dec 2002 18:59:25 +0800

Hello,
when I give a wrong number of the expression level the function part return an 
error instead something like false or nil
(C1) expr:X*Y*Z;
(D1)                                 X Y Z
(C2) part(expr,3);
(D2)                                   Z
(C3) part(expr,4);
PART fell off end.
 -- an error.  Quitting.  To debug this try DEBUGMODE(TRUE);)
(C4)
what could be a way aroud this?

Thanks in advance

Valerij

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