From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: even elder races get tired of waiting
Date: Sun, 21 Mar 2021 23:30:35 +0100 [thread overview]
Message-ID: <87h7l4nnqs.fsf@zoho.eu> (raw)
In-Reply-To: YFeCkMBVKF0tL9AN@protected.localdomain
>> OK? And days start at 00:00?
>
> Good question!
>
> There are few definitions for days, some definitions will
> say it starts at zero, some others will tell it is interval
> of 24 hours, not necessarily starting at zero, and some
> definition will speak of daylight period. [...]
How do you suggest I improve the function?
;;; -*- lexical-binding: t -*-
;;;
;;; this file:
;;; http://user.it.uu.se/~embe8573/emacs-init/time-cmp.el
;;; https://dataswamp.org/~incal/emacs-init/time-cmp.el
;; ...
(require 'cl-lib)
(defun days-from-date (d1 d2)
(let*((sep "-")
(d1-data (cl-map 'list #'string-to-number (split-string d1 sep)))
(d2-data (cl-map 'list #'string-to-number (split-string d2 sep)))
(y1 (car d1-data))
(m1 (cadr d1-data))
(d1 (caddr d1-data))
(y2 (car d2-data))
(m2 (cadr d2-data))
(d2 (caddr d2-data)) )
(days-from y1 m1 d1 y2 m2 d2) ))
;; (days-from-date "2021-03-19" "2021-04-20") ; 31
(defun days-from (y1 m1 d1 y2 m2 d2)
(let*((s-then (float-time (encode-time 0 0 0 d1 m1 y1)))
(s-now (float-time (encode-time 0 0 0 d2 m2 y2)))
(s-diff (- s-now s-then)) )
(string-to-number (format-seconds "%d" s-diff) )))
;; (days-from 2021 03 19 2021 04 20) ; 31
;; ...
--
underground experts united
http://user.it.uu.se/~embe8573
https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-03-21 22:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 20:37 even elder races get tired of waiting Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-21 14:01 ` Jean Louis
2021-03-21 14:19 ` Jean Louis
2021-03-21 15:12 ` Jude DaShiell
2021-03-21 17:10 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-21 17:29 ` Jean Louis
2021-03-21 17:38 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 7:21 ` Jean Louis
2021-03-21 22:30 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-03-22 7:48 ` Jean Louis
2021-03-22 18:29 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 19:10 ` Jean Louis
2021-03-22 19:47 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 20:31 ` Jean Louis
2021-03-22 21:33 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 21:40 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 22:43 ` Jean Louis
2021-03-22 23:34 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 23:38 ` Jean Louis
2021-03-22 23:52 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 8:42 ` Jean Louis
2021-03-22 18:31 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 19:21 ` Jean Louis
2021-03-21 17:13 ` Jean Louis
2021-03-21 19:24 ` Jude DaShiell
2021-03-21 22:34 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-03-22 7:54 ` Jean Louis
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