15 lines
342 B
Common Lisp
15 lines
342 B
Common Lisp
(defmacro inc (x &optional (val 1))
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`(setf ,x (+ ,val ,x)))
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;; For system arguments
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(defmacro when-option ((options opt) &body body)
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`(let ((it (getf ,options ,opt)))
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(when it
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,@body)))
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(defun max-length (lists)
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(reduce (lambda (a x) (max a x)) (mapcar #'length lists)))
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(defun nonempty-p (s)
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(not (zerop (length s))))
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