More Children

Convenience functions to work with children:

(defun list-children (node) ...) => fresh list

(defmacro do-children ((var node &optional result) &body body) ...)

Also: nth-child, first-child, last-child, previous-sibling, next-sibling

In addition, lots of sequence-like functions are provided:

(defun find-child (value parent &key from-end start end key test) ...)

• find-child[-if]
• count-children[-if]
• child-position[-if]
• filter-children