procyberian/emacs
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

New convenience functions in seq.el

Browse source 
Functions to access the first or all but the first elements of
sequences have been repeatedly asked for (the last occurrence being
https://github.com/NicolasPetton/seq.el/issues/9).

* lisp/emacs-lisp/seq.el (seq-first, seq-rest): New functions.
* test/lisp/emacs-lisp/seq-tests.el (test-seq-first, test-seq-rest):
New tests for seq-first and seq-rest.
This commit is contained in:
Nicolas Petton 2018-12-18 09:42:50 +01:00
parent 73b2f7ac69
commit 5a9eba603d
No known key found for this signature in database
GPG key ID: E8BCD7866AFCF978
2 changed files with 21 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

10
lisp/emacs-lisp/seq.el
View file

@ -4,7 +4,7 @@
;; Author: Nicolas Petton <nicolas@petton.fr>
;; Keywords: sequences
;; Version: 2.20
;; Version: 2.21
;; Package: seq
;; Maintainer: emacs-devel@gnu.org
@ -110,6 +110,14 @@ name to be bound to the rest of SEQUENCE."
"Return the number of elements of SEQUENCE."
(length sequence))
(defun seq-first (sequence)
"Return the first element of SEQUENCE."
(seq-elt sequence 0))
(defun seq-rest (sequence)
"Return a sequence of the elements of SEQUENCE except the first one."
(seq-drop sequence 1))
(cl-defgeneric seq-do (function sequence)
"Apply FUNCTION to each element of SEQUENCE, presumably for side effects.
Return SEQUENCE."