x
(list x)))
-(defun !reduce (func list &key initial-value)
- (if (null list)
- initial-value
- (!reduce func
- (cdr list)
- :initial-value (funcall func initial-value (car list)))))
+(defun !reduce (func list initial-value)
+ (let ((result initial-value))
+ (dolist (element list result)
+ (setq result (funcall func result element)))))
;;; Concatenate a list of strings, with a separator
(defun join (list &optional (separator ""))
- (!reduce (lambda (s o) (concat s separator o))
- (cdr list)
- :initial-value (car list)))
+ (if (null list)
+ ""
+ (!reduce (lambda (s o) (concat s separator o))
+ (cdr list)
+ (car list))))
(defun join-trailing (list &optional (separator ""))
(if (null list)
(defun float-to-string (x)
#+jscl (float-to-string x)
- #+common-lisp (format nil "~f" x))
+ #-jscl (format nil "~f" x))