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(node-list-filter-by-not-gi nodelist gilist)
Returns a node list containing all the nodes from nodelist whose GIs are NOT members of gilist. The order of nodes in the node list is preserved.
Norman Walsh, <ndw@nwalsh.com>
(define (node-list-filter-by-not-gi nodelist gilist) ;; Returns selected elements from a node list (let loop ((result (empty-node-list)) (nl nodelist)) (if (node-list-empty? nl) result (if (member (gi (node-list-first nl)) gilist) (loop result (node-list-rest nl)) (loop (node-list result (node-list-first nl)) (node-list-rest nl))))))
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