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drewc/gist:250c558bcf0041c5e43fbc3297893ae8

Created January 31, 2019 22:08
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gistfile1.txt
(defun sequence-right-trim (thing sequence)
(let ((last (elt sequence (- (length sequence) 1))))
(if (equalp thing last)
(subseq sequence 0 (1+ (position-if-not (lambda (c) (equalp c thing)) sequence :from-end t)))
sequence)))
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