* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
@ 2009-07-04 13:00 waterloo
2009-07-04 23:11 ` Glenn Morris
0 siblings, 1 reply; 6+ messages in thread
From: waterloo @ 2009-07-04 13:00 UTC (permalink / raw
To: emacs-pretest-bug
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In section 8.5.1 in the manual `Introduction to Emacs Lisp'. I can
not understant what is `readily settable variable' in second
paragraph. Thanks . waterloo2005@gmail.com
In GNU Emacs 23.0.95.1 (i686-pc-linux-gnu, GTK+ Version 2.14.7)
of 2009-06-21 on laptop
Windowing system distributor `The X.Org Foundation', version 11.0.10503000
configured using `configure '--prefix=/usr' '--build=i686-pc-linux-gnu'
'--host=i686-pc-linux-gnu' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
'--localstatedir=/var/lib' '--program-suffix=-emacs-23'
'--infodir=/usr/share/info/emacs-23' '--with-sound' '--with-x'
'--without-toolkit-scroll-bars' '--with-gif' '--with-jpeg' '--with-png'
'--with-rsvg' '--with-tiff' '--with-xpm' '--with-xft' '--without-libotf'
'--without-m17n-flt' '--with-x-toolkit=gtk' '--without-hesiod'
'--without-kerberos' '--without-kerberos5' '--with-gpm' '--with-dbus'
'build_alias=i686-pc-linux-gnu' 'host_alias=i686-pc-linux-gnu' 'CFLAGS=-O2
-march=pentium-m -pipe' 'LDFLAGS=-Wl,-O1''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: en_US.UTF-8
value of $LC_CTYPE: zh_CN.UTF-8
value of $LC_MESSAGES: en_US.UTF-8
value of $LC_MONETARY: en_US.UTF-8
value of $LC_NUMERIC: en_US.UTF-8
value of $LC_TIME: en_US.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=SCIM
locale-coding-system: utf-8-unix
default-enable-multibyte-characters: t
Minor modes in effect:
reftex-mode: t
TeX-fold-mode: t
flyspell-mode: t
TeX-source-specials-mode: t
minibuffer-depth-indicate-mode: t
icicle-mode: t
show-paren-mode: t
display-time-mode: t
global-auto-complete-mode: t
auto-complete-mode: t
desktop-save-mode: t
yas/minor-mode: t
auto-image-file-mode: t
outline-minor-mode: t
shell-dirtrack-mode: t
tooltip-mode: t
tool-bar-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
global-auto-composition-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
abbrev-mode: t
Recent input:
<drag-mouse-1> <help-echo> <down-mouse-1> <mouse-1>
<down-mouse-5> <mouse-5> <help-echo> <help-echo> <down-mouse-1>
<help-echo> <help-echo> <help-echo> <down-mouse-4>
<mouse-4> <down-mouse-1> <mouse-movement> <mouse-movement>
<help-echo> <drag-mouse-1> <help-echo> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-1> <help-echo> <help-echo>
<down-mouse-4> <mouse-4> <double-down-mouse-4> <double-mouse-4>
<down-mouse-5> <mouse-5> <down-mouse-4> <mouse-4> <help-echo>
<tool-bar> <Exit> <help-echo> <tool-bar> <Exit> <help-echo>
<tool-bar> <Exit> <help-echo> <help-echo> <help-echo>
<tool-bar> <kill-buffer> <down-mouse-4> <mouse-4> <down-mouse-4>
<mouse-4> <double-down-mouse-4> <double-mouse-4> <down-mouse-4>
<mouse-4> <double-down-mouse-4> <double-mouse-4> <help-echo>
<down-mouse-3> <mouse-3> <help-echo> <down-mouse-1>
<mouse-1> <help-echo> <menu-bar> <buffer> C-h <help-echo>
<tool-bar> <kill-buffer> <menu-bar> <buffer> C-h <help-echo>
<tool-bar> <kill-buffer> <help-echo> <menu-bar> <buffer>
C-h <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <menu-bar> <file> <kill-buffer> <help-echo>
<menu-bar> <buffer> C-h <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <menu-bar> <file> <kill-buffer> <help-echo>
<help-echo> <menu-bar> <buffer> C-h <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <menu-bar> <file>
<kill-buffer> <help-echo> <help-echo> <help-echo> <help-echo>
<menu-bar> <buffer> C-h <down-mouse-4> <mouse-4> <double-down-mouse-4>
<double-mouse-4> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <menu-bar>
<file> <kill-buffer> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <down-mouse-3> <mouse-3> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <tool-bar> <latex> <help-echo>
<help-echo> <down-mouse-5> <mouse-5> <down-mouse-1>
<mouse-movement> <mouse-1> <return> <right> <right>
<right> <right> <right> <right> <right> <right> <down-mouse-1>
<mouse-1> SPC <delete> <delete> <delete> <delete> <delete>
<delete> <delete> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-1> SPC <help-echo> <help-echo> <help-echo> <tool-bar>
<save-buffer> <down-mouse-1> <mouse-movement> <mouse-movement>
<drag-mouse-1> C-c C-p C-r <help-echo> <down-mouse-1>
<mouse-1> <help-echo> <down-mouse-3> <mouse-3> <help-echo>
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<help-echo> <down-mouse-1> <mouse-movement> <mouse-1>
% <help-echo> <down-mouse-3> <mouse-3> <backspace>
<help-echo> <tool-bar> <undo> <help-echo> <tool-bar>
<undo> <help-echo> <help-echo> <help-echo> <down-mouse-1>
<help-echo> <mouse-movement> <mouse-1> <help-echo>
<down-mouse-1> <mouse-movement> <help-echo> <mouse-movement>
<mouse-movement> <drag-mouse-1> <help-echo> C-c C-p
C-c C-r <down-mouse-1> <mouse-1> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> M-x r e p o <tab>
r <tab> <return>
Recent messages:
Type `C-c C-l' to display results of compilation.
Quit
Saving file /media/bak/latex/_region_.tex...
Wrote /media/bak/latex/_region_.tex
Type `C-c C-l' to display results of compilation.
locating previews...
Mark set
Type `C-c C-l' to display results of compilation.
Undo! [2 times]
Computing completion candidates...
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^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
2009-07-04 13:00 bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp waterloo
@ 2009-07-04 23:11 ` Glenn Morris
2009-07-05 2:13 ` waterloo
0 siblings, 1 reply; 6+ messages in thread
From: Glenn Morris @ 2009-07-04 23:11 UTC (permalink / raw
To: waterloo; +Cc: 3752
waterloo wrote:
> --text follows this line--
> In section 8.5.1 in the manual `Introduction to Emacs Lisp'. I can
> not understant what is `readily settable variable' in second
> paragraph.
Does the following make it clearer?
When you specified a variable using the `defvar' special form, you
could distinguish a variable that a user might want to change from
others by typing an asterisk,...
It should be read in the context of the previous paragraph.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
2009-07-04 23:11 ` Glenn Morris
@ 2009-07-05 2:13 ` waterloo
2009-07-05 2:30 ` Glenn Morris
0 siblings, 1 reply; 6+ messages in thread
From: waterloo @ 2009-07-05 2:13 UTC (permalink / raw
To: Glenn Morris
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yes,it is clearer . thanks
In 11.1.2 An Example:`print-elements-of-list', I can not understand why
there is a `nil' in the context .
thanks
If I shoud file a new bug for this question?
I still use emacs23.0.95 .
2009/7/5 Glenn Morris <rgm@gnu.org>
> waterloo wrote:
>
> > --text follows this line--
> > In section 8.5.1 in the manual `Introduction to Emacs Lisp'. I can
> > not understant what is `readily settable variable' in second
> > paragraph.
>
> Does the following make it clearer?
>
> When you specified a variable using the `defvar' special form, you
> could distinguish a variable that a user might want to change from
> others by typing an asterisk,...
>
> It should be read in the context of the previous paragraph.
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
2009-07-05 2:13 ` waterloo
@ 2009-07-05 2:30 ` Glenn Morris
2009-07-05 2:47 ` waterloo
0 siblings, 1 reply; 6+ messages in thread
From: Glenn Morris @ 2009-07-05 2:30 UTC (permalink / raw
To: waterloo; +Cc: 3752
[Please use "reply to all".]
waterloo wrote (on Sun, 5 Jul 2009 at 10:13 +0800):
> yes,it is clearer . thanks
>
> In 11.1.2 An Example:`print-elements-of-list', I can not understand why
> there is a `nil' in the context .
This is explained at the end of the section:
Since the last expression in the function is the `while' loop, and
since `while' loops always return `nil', a `nil' is printed after the
last element of the list.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
2009-07-05 2:30 ` Glenn Morris
@ 2009-07-05 2:47 ` waterloo
2009-07-06 0:58 ` Glenn Morris
0 siblings, 1 reply; 6+ messages in thread
From: waterloo @ 2009-07-05 2:47 UTC (permalink / raw
To: Glenn Morris; +Cc: 3752
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when test of while is nil , it does not run `print' following it.
who does print nil ?
or if all function will print its return value ?
thanks
2009/7/5 Glenn Morris <rgm@gnu.org>
>
> [Please use "reply to all".]
>
> waterloo wrote (on Sun, 5 Jul 2009 at 10:13 +0800):
>
> > yes,it is clearer . thanks
> >
> > In 11.1.2 An Example:`print-elements-of-list', I can not understand why
> > there is a `nil' in the context .
>
> This is explained at the end of the section:
>
> Since the last expression in the function is the `while' loop, and
> since `while' loops always return `nil', a `nil' is printed after the
> last element of the list.
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp .
2009-07-05 2:47 ` waterloo
@ 2009-07-06 0:58 ` Glenn Morris
0 siblings, 0 replies; 6+ messages in thread
From: Glenn Morris @ 2009-07-06 0:58 UTC (permalink / raw
To: waterloo; +Cc: 3752
waterloo wrote:
> when test of while is nil , it does not run `print' following it.
> who does print nil ?
>
> or if all function will print its return value ?
As explained in the earlier section of the manual (on "Evaluation"),
evaluating a function with C-x C-e prints the return value. For example
(+ 2 2)
or
(progn
(princ "Evaluating with C-x C-e prints the return value.\n")
42)
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-07-06 0:58 UTC | newest]
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2009-07-04 13:00 bug#3752: 23.0.95; I can not understant a sentence in Intro to Emacs Lisp waterloo
2009-07-04 23:11 ` Glenn Morris
2009-07-05 2:13 ` waterloo
2009-07-05 2:30 ` Glenn Morris
2009-07-05 2:47 ` waterloo
2009-07-06 0:58 ` Glenn Morris
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