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From: Drew Adams <drew.adams@oracle.com>
To: Omar Polo <op@omarpolo.com>, wael-zwaiter@gmx.com
Cc: help-gnu-emacs@gnu.org
Subject: RE: Elisp - Store path only once
Date: Sat, 9 Jan 2021 13:34:12 -0800 (PST)	[thread overview]
Message-ID: <f7608d58-7005-4c3b-a4eb-ab2b665e8ef6@default> (raw)
In-Reply-To: <B52F836E-7C27-4A0E-A9B5-D7CE99106087@omarpolo.com>

> >(load 'g-eshell)
> >(load 'g-utils)
>
> (require 'something)

There are (at least) 3 functions you can use to load a list file: `require', `load-library', and `load'.

1. `require' loads the library (*.elc or *.el) only once,
   i.e., only if it hasn't yet been loaded.

2. `load-library' and `load' (also `load-file') load the
   library (*.elc or *.el) unconditionally, i.e., each time.

3. `load-library' looks for a library name in your `load-path'.
   `load' and `load-file expect a file name, not a library
   name, but `load' does search directories in `load-path',
   and `load' does try adding suffixes .elc and .el.

This is explained better than I've done here in the Emacs manual, node `Lisp Libraries' (ask Emacs).

https://www.gnu.org/software/emacs/manual/html_node/emacs/Lisp-Libraries.html



  parent reply	other threads:[~2021-01-09 21:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-09 10:47 Elisp - Store path only once wael-zwaiter
2021-01-09 10:54 ` Omar Polo
2021-01-09 11:30   ` wael-zwaiter
2021-01-09 11:53     ` Omar Polo
2021-01-09 12:55       ` wael-zwaiter
2021-01-09 17:34         ` Omar Polo
2021-01-09 21:34       ` Drew Adams [this message]
2021-01-09 21:56         ` Stefan Monnier
2021-01-09 22:07           ` Drew Adams

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