On Sat, Nov 6, 2010 at 5:02 AM, Sunil S Nandihalli <
sunil.nandiha...@gmail.com> wrote:

> after looking through his source code ... I discovered that replacing
> cond-u with cond-a gives me the expected output .. but I am unable to
> explain what I have found...
> Regards,
> Sunil.
>

mem-o is the the logical version of mem which returns the remainder of the
list from the first occurence of some atom:

(mem 'apple '(orange pineapple apple strawberry)) -> '(apple strawberry)

member-o is the logical version of member? which tests whether an atom
occurs at least once in a list:

(member? 'apple '(orange pineapple apple strawberry)) -> #t

I believe that: if a cond-a goal succeeds the remaining goals are ignored.
cond-u is like cond-a but a goal can succeed only once. From what I
understand these are analogous to cuts in Prolog.

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