node-list-filter-out-pis

Description

Returns a node list containing all the nodes from nodelist that are not PIs. The order of nodes in the node list is preserved.

Author

Norman Walsh, <ndw@nwalsh.com>

Source Code

(define (node-list-filter-out-pis nodelist)
  ;; Returns the nodelist with all PIs removed
  (let loop ((result (empty-node-list)) (nl nodelist))
    (if (node-list-empty? nl)
	result
	(if (equal? (node-property 'class-name (node-list-first nl)) 'pi)
	    (loop result (node-list-rest nl))
	    (loop (node-list result (node-list-first nl))
		  (node-list-rest nl))))))