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authorAryadev Chavali <aryadev@aryadevchavali.com>2024-10-30 22:33:31 +0000
committerAryadev Chavali <aryadev@aryadevchavali.com>2024-10-30 22:33:31 +0000
commit65b65a2a3ef1c9cee21791b41fa9409586249ab6 (patch)
tree4c781e3aaa161e469f521fefaec2e70fffd8eda4
parentde4c5bbd5351bff29a2197233d2f0e2f3b1681e1 (diff)
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Introduce tests for split-by-first and split-by-completely
Allows one to split by string delimiter, or anything else.
-rw-r--r--2022/lib.lisp14
1 files changed, 7 insertions, 7 deletions
diff --git a/2022/lib.lisp b/2022/lib.lisp
index 28efbae..d82bc9c 100644
--- a/2022/lib.lisp
+++ b/2022/lib.lisp
@@ -6,25 +6,25 @@
(string clist)
(coerce clist 'string)))
-(defun split-by-first (lst delim)
+(defun split-by-first (lst delim &optional (test #'eq))
"Splits LST by the first instance of DELIM"
- (let ((pos (position delim lst)))
+ (let ((pos (position delim lst :test test)))
(if pos
(list (subseq lst 0 pos) (subseq lst (+ pos 1)))
(error (format nil "No instance of ~a was found in ~a" delim lst)))))
-(defun split-by-completely (lst delim)
+(defun split-by-completely (lst delim &optional (test #'eq))
(cond
((or (null lst) (not (cdr lst)))
(list (car lst)))
- ((not (member delim lst))
+ ((not (member delim lst :test test))
(list lst))
(t
(loop
- for (start rest) = (split-by-first lst delim)
- then (split-by-first rest delim)
+ for (start rest) = (split-by-first lst delim test)
+ then (split-by-first rest delim test)
collect start
- if (not (member delim rest))
+ if (not (member delim rest :test test))
collect rest
and do (loop-finish)))))