GNU bug report logs - #19454
24.3; apply doesn't work as in Common Lisp

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: sindikat <at> mail36.net (sindikat <at> mail36.net)
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; apply doesn't work as in Common Lisp
Date: Sat, 27 Dec 2014 23:28:18 +0000

(apply 'mapcar 'list '((1 2))) ; ((1) (2))
(apply 'mapcar 'list '((1 2) (3 4))) ; error

The error is:

*** Eval error ***  Wrong number of arguments: mapcar, 3

In Common Lisp `(apply 'mapcar 'list '((1 2) (3 4)))' would be
`'((1 3) (2 4))'.


In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.8.4)
 of 2013-09-26 on trouble, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11403000
System Description:	LMDE Cinnamon Edition

Configured using:
 `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var/lib' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 '--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk3' '--with-toolkit-scroll-bars'
 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
 'LDFLAGS=-Wl,-z,relro' 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: IELM

Minor modes in effect:
  shell-dirtrack-mode: t
  eldoc-mode: t
  icomplete-mode: t
  global-hl-line-mode: t
  show-paren-mode: t
  ido-everywhere: t
  keyfreq-autosave-mode: t
  keyfreq-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  override-global-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent input:
<backspace> M-p M-p M-p <return> M-u M-u M-u C-M-SPC 
M-c M-b i e <return> M-SPC C-M-SPC <backspace> M-v 
<return> M-v M-h M-r M-e M-H C-x C-e M-r M-I M-I <backspace> 
M-H <return> <down-mouse-1> <mouse-1> M-J ( a p p l 
y SPC ' m a p c a r SPC ' l i s t SPC ' <backspace> 
M-h M-t <backspace> <M-backspace> ( M-H M-h M-i <M-backspace> 
M-H ( l i s t SPC 1 SPC 2 SPC ) <backspace> 3 ) ) <return> 
<C-up> M-h M-i a p p l y SPC ' <return> <C-up> M-n 
M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n ( l 
i s t SPC M-H ) <return> l o l <return> ( a p p l y 
SPC ' m a p c a r SPC ' l i s t SPC ( l i s t SPC ( 
<backspace> ' ( 1 SPC 2 SPC <backspace> ) SPC ' ( 3 
SPC 4 ) ) ) <return> <C-up> M-n M-n <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
M-H <return> <C-up> M-n M-n SPC ( <backspace> ' ( SPC 
<backspace> <backspace> <backspace> <backspace> M-n 
M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n C-M-SPC 
<backspace> ' ( 1 SPC 2 ) M-H <return> <C-up> M-n M-n 
M-n M-n M-n M-n M-n M-i <backspace> ( l i s t SPC ' 
M-H ) <return> <C-up> <backspace> SPC ( l i s t SPC 
' ( 3 SPC 4 ) ) ) <return> <C-up> M-n M-n M-n M-n M-n 
M-n M-n M-n M-n M-n M-n M-n M-n M-n M-n M-i C-M-SPC 
<backspace> <backspace> <backspace> M-H <backspace> 
SPC ' ( 3 SPC 4 ) ) ) <return> M-u M-u C-M-SPC M-c 
M-a r e p o r t <tab> <return>

Recent messages:
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Message #12 received at 19454-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: sindikat <at> mail36.net (sindikat <at> mail36.net)
Cc: 19454-done <at> debbugs.gnu.org
Subject: Re: bug#19454: 24.3; apply doesn't work as in Common Lisp
Date: Sat, 27 Dec 2014 20:14:55 -0500

tags 19454 notabug
thanks

> (apply 'mapcar 'list '((1 2))) ; ((1) (2))
> (apply 'mapcar 'list '((1 2) (3 4))) ; error

> The error is:

> *** Eval error ***  Wrong number of arguments: mapcar, 3

Nothing to do with `apply'.  You get the same error with

   (mapcar #'list '(1 2) '(3 4))

That's because Elisp is not Common-Lisp.  If you want Common Lisp's
mapcar, then use `cl-mapcar' (after requiring `cl-lib').


        Stefan

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