blob: 30c1e644a4fe8a771bde7e9e4a0f213a87114c84 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
;;; lib.functions.lisp - 2025-02-09
;; Copyright (C) 2025 Aryadev Chavali
;; This program is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
;; FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
;; details.
;; You may distribute and modify this code under the terms of the GNU General
;; Public License Version 2, which you should have received a copy of along with
;; this program. If not, please go to <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Helpful functions for usage throughout the project.
;;; Code:
(in-package :lib.functions)
(fn range (start end &optional (step 1)) (-> (fixnum fixnum &optional fixnum) list)
"Make a list of numbers from START to END (exclusive). If STEP is given, then
each member is STEP distance apart."
(if (<= end start)
(error (format nil "~a < ~a" end start))
(loop :for i :from start :to (1- end) :by step
:collect i)))
(fn parse-integer* (inp) (-> (string) (or integer list))
(parse-integer inp :junk-allowed t))
(fn take (n lst) (-> (fixnum list) list)
(subseq lst 0 n))
|
