(append (list 'A) (list 'X 'T)) = (list 'A 'X 'T)<BR><BR><B><I>Matthias Felleisen <matthias@ccs.neu.edu></I></B> wrote: <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <DIV><BR></DIV> <DIV>Here is a definition of 'adding in the missing element': </DIV> <DIV><BR></DIV> <DIV>* If a list X misses the symbol 'A (at the front), how do you get a list that has the 'A and all of X? </DIV> <DIV><BR></DIV> <DIV>* X = (list 'X 'T) and 'A --> I want (list 'A 'X 'T). How do I do that? </DIV> <DIV><BR></DIV> <DIV>-- Matthias</DIV> <DIV><BR></DIV></BLOCKQUOTE><p> 
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