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computers / comp.os.linux.misc / Re: Why are hyperlinks blue?

SubjectAuthor
* Why are hyperlinks blue?Andrei Z.
+- Re: Why are hyperlinks blue?Computer Nerd Kev
`* Re: Why are hyperlinks blue?SixOverFive
 +- Re: Why are hyperlinks blue?The Natural Philosopher
 `* Re: Why are hyperlinks blue?Carlos E. R.
  `* Re: Why are hyperlinks blue?Rich
   +* Re: Why are hyperlinks blue?The Natural Philosopher
   |`* Re: Why are hyperlinks blue?Eli the Bearded
   | `- Re: Why are hyperlinks blue?Richard Kettlewell
   `* Re: Why are hyperlinks blue?Aragorn
    `- Re: Why are hyperlinks blue?Richard Kettlewell

1
Why are hyperlinks blue?

<sg9pff$17a$1@gioia.aioe.org>

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From: no-email@invalid.invalid (Andrei Z.)
Newsgroups: comp.os.linux.misc
Subject: Why are hyperlinks blue?
Date: Fri, 27 Aug 2021 07:25:19 +0300
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 by: Andrei Z. - Fri, 27 Aug 2021 04:25 UTC

Why are hyperlinks blue?

https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/

Re: Why are hyperlinks blue?

<sgcho5$4fb$1@gioia.aioe.org>

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From: not@telling.you.invalid (Computer Nerd Kev)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sat, 28 Aug 2021 05:31:50 -0000 (UTC)
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 by: Computer Nerd Kev - Sat, 28 Aug 2021 05:31 UTC

Andrei Z. <no-email@invalid.invalid> wrote:
> Why are hyperlinks blue?
>
> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/

Quite interesting. That article didn't mention the IBM BookManager
Library Reader for Windows which defaults to blue (without
underline) for link text in the last release. That release shows a
copyright year of 1994 in the "About" window; I don't know where
to find earlier versions but it might turn out to be among the
earlier blue-hyperlink adopters.

--
__ __
#_ < |\| |< _#

Re: Why are hyperlinks blue?

<oKydnUKDP-vFV7T8nZ2dnUU7-VXNnZ2d@earthlink.com>

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From: hae274c.net@nowhere (SixOverFive)
Date: Sat, 28 Aug 2021 01:32:07 -0400
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 by: SixOverFive - Sat, 28 Aug 2021 05:32 UTC

On 08/27/2021 12:25 AM, Andrei Z. wrote:
> Why are hyperlinks blue?
>
> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/

Why do Python comments begin with a "#" ???

It's often "inventors priority" in these things.
No actual REASON for it ... the HTML inventors
just wanted links to stand out somehow. Blue
looked nice ...

Re: Why are hyperlinks blue?

<sgcr20$m1a$3@dont-email.me>

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From: tnp@invalid.invalid (The Natural Philosopher)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sat, 28 Aug 2021 09:10:40 +0100
Organization: A little, after lunch
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 by: The Natural Philosop - Sat, 28 Aug 2021 08:10 UTC

On 28/08/2021 06:32, SixOverFive wrote:
> On 08/27/2021 12:25 AM, Andrei Z. wrote:
>> Why are hyperlinks blue?
>>
>> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/
>
>
>   Why do Python comments begin with a "#" ???
its been a convention in script languages for years.
C uses // or /* .....*/
Assembler used ; .....
>
>   It's often "inventors priority" in these things.
>   No actual REASON for it ... the HTML inventors
>   just wanted links to stand out somehow. Blue
>   looked nice ...

need something. # as good as anything else.

--
Outside of a dog, a book is a man's best friend. Inside of a dog it's
too dark to read.

Groucho Marx

Re: Why are hyperlinks blue?

<m7ipvhxbkm.ln2@minas-tirith.valinor>

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From: robin_listas@es.invalid (Carlos E. R.)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sat, 28 Aug 2021 13:11:18 +0200
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 by: Carlos E. R. - Sat, 28 Aug 2021 11:11 UTC

On 28/08/2021 07.32, SixOverFive wrote:
> On 08/27/2021 12:25 AM, Andrei Z. wrote:
>> Why are hyperlinks blue?
>>
>> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/
>
>
>   Why do Python comments begin with a "#" ???

Because that char was available.

All languages I know chose one character or a combo to mark comments.
They need it, some character that doesn't have already a meaning in the
language. For example, Pascal used "(* ... *)", and later Turbo pascal
added "{ ... }", and even later added "// ..."

Basic used a line starting with "REM" (remark).

--
Cheers,
Carlos E.R.

Re: Why are hyperlinks blue?

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From: rich@example.invalid (Rich)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sun, 29 Aug 2021 04:21:17 -0000 (UTC)
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 by: Rich - Sun, 29 Aug 2021 04:21 UTC

Carlos E. R. <robin_listas@es.invalid> wrote:
> On 28/08/2021 07.32, SixOverFive wrote:
>> On 08/27/2021 12:25 AM, Andrei Z. wrote:
>>> Why are hyperlinks blue?
>>>
>>> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/
>>
>>
>>   Why do Python comments begin with a "#" ???
>
> Because that char was available.

Another possibility (for the Python specific question) is that Python
simply copied the Unix shell's comment character, which is also a #.

But then that just moves the question back to: Why do Unix shell
comments begin with a "#"?

Re: Why are hyperlinks blue?

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From: tnp@invalid.invalid (The Natural Philosopher)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sun, 29 Aug 2021 08:44:54 +0100
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 by: The Natural Philosop - Sun, 29 Aug 2021 07:44 UTC

On 29/08/2021 05:21, Rich wrote:
> Carlos E. R. <robin_listas@es.invalid> wrote:
>> On 28/08/2021 07.32, SixOverFive wrote:
>>> On 08/27/2021 12:25 AM, Andrei Z. wrote:
>>>> Why are hyperlinks blue?
>>>>
>>>> https://blog.mozilla.org/en/internet-culture/deep-dives/why-are-hyperlinks-blue/
>>>
>>>
>>>   Why do Python comments begin with a "#" ???
>>
>> Because that char was available.
>
> Another possibility (for the Python specific question) is that Python
> simply copied the Unix shell's comment character, which is also a #.
>
> But then that just moves the question back to: Why do Unix shell
> comments begin with a "#"?
>
Why not?

--
"Socialist governments traditionally do make a financial mess. They
always run out of other people's money. It's quite a characteristic of them"

Margaret Thatcher

Re: Why are hyperlinks blue?

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From: thorongil@telenet.be (Aragorn)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
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 by: Aragorn - Sun, 29 Aug 2021 14:43 UTC

On 29.08.2021 at 04:21, Rich scribbled:

> Carlos E. R. <robin_listas@es.invalid> wrote:
>
> > On 28/08/2021 07.32, SixOverFive wrote:
> >
> >>   Why do Python comments begin with a "#" ???
> >
> > Because that char was available.
>
> Another possibility (for the Python specific question) is that Python
> simply copied the Unix shell's comment character, which is also a #.
>
> But then that just moves the question back to: Why do Unix shell
> comments begin with a "#"?

Slightly educated guess: it may have been inherited from Multics.

--
With respect,
= Aragorn

Re: Why are hyperlinks blue?

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Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Sun, 29 Aug 2021 21:44:48 -0000 (UTC)
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 by: Eli the Bearded - Sun, 29 Aug 2021 21:44 UTC

In comp.os.linux.misc, The Natural Philosopher <tnp@invalid.invalid> wrote:
> On 29/08/2021 05:21, Rich wrote:
>> Another possibility (for the Python specific question) is that Python
>> simply copied the Unix shell's comment character, which is also a #.

Yeah, # was a common choice of comment character before Python existed,
so need to look back before Python.

>> But then that just moves the question back to: Why do Unix shell
>> comments begin with a "#"?
> Why not?

:r! stty -a |grep erase
-echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo
erase = ^?; intr = ^C; kill = ^U; lnext = ^V; min = 1; quit = ^\;
time = 0; werase = ^W;

These days erase defaults to del (^?) or backspace (^H), but I can
remember a time when it defaulted to #, and using your backspace
character as a comment indicator makes it hard to add comments. My 1988
copy of _The Unix Operating System_ (second edition) by Kaare Christian
shows defaults (page 98)

erase = #, kill = @, intr = ^?

(I remember seeing that kill thing also interfere with use of @ in
passwords.) The book does not show the default for lnext, which is what
you'd need to type to escape the special meaning of # or @ to use it in
comments. There's an explanation that you can use # for comments in
shell scripts (p195), but no explaination for why in that book.

For reference, first release of Python was 1991. First release of Perl,
which also uses # for comments, is 1988.

Looking around I see a 1967 doc for BCPL using // for comments, very
c++ ish:

https://www.bell-labs.com/usr/dmr/www/bcpl.pdf

The Unix Seventh Edition man pages, in *roff format which I can read
fine but..., are here:

https://s3.amazonaws.com/plan9-bell-labs/7thEdMan/index.html

I see that awk uses # for comments, but shell shows : for comments.
These days, in sh the : command is a substitute for /bin/true. It
works like a no-op command, which is subtly different from a comment:

#!/bin/sh
#this is a comment
:this will like produce ":this: command not found"
# the following does nothing
# > /etc/passwd
: the following will produce an error or destroy your system
: > /etc/password
: moral: don't run stuff as root
# oops, no closing quote!

https://s3.amazonaws.com/plan9-bell-labs/7thEdMan/vol2/awk.txt

.ND "September 1, 1978"

https://s3.amazonaws.com/plan9-bell-labs/7thEdMan/vol2/shell.bun.txt

.ds DA 1977 November 1

No stty manpage there to look for control character defaults. Erase,
kill, etc, might not have made sense in early ASR-33 days. I wasn't
there and don't know. BUT probably:

Larry Wall probably used # for comments in Perl because AWK used # for
comments. Guido van Rossum likely used # for comments because languages
like AWK and Perl used # for comments.

Elijah
------
carefully uses : for embeded vi commands in shell scripts sometimes

Re: Why are hyperlinks blue?

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Subject: Re: Why are hyperlinks blue?
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 by: Richard Kettlewell - Mon, 30 Aug 2021 07:08 UTC

Aragorn <thorongil@telenet.be> writes:
> On 29.08.2021 at 04:21, Rich scribbled:
>> Carlos E. R. <robin_listas@es.invalid> wrote:
>>> On 28/08/2021 07.32, SixOverFive wrote:
>>>> Why do Python comments begin with a "#" ???
>>>
>>> Because that char was available.
>>
>> Another possibility (for the Python specific question) is that Python
>> simply copied the Unix shell's comment character, which is also a #.
>>
>> But then that just moves the question back to: Why do Unix shell
>> comments begin with a "#"?
>
> Slightly educated guess: it may have been inherited from Multics.

Probably not; the Multics user guide documents # as being used to delete
input.

http://bitsavers.trailing-edge.com/pdf/honeywell/multics/GB61-01B_OperatorsGde_Dec87.pdf

--
https://www.greenend.org.uk/rjk/

Re: Why are hyperlinks blue?

<87ilzlh024.fsf@LkoBDZeT.terraraq.uk>

 copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=7499&group=comp.os.linux.misc#7499

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Path: i2pn2.org!i2pn.org!news.nntp4.net!nntp.terraraq.uk!.POSTED.nntp.terraraq.uk!not-for-mail
From: invalid@invalid.invalid (Richard Kettlewell)
Newsgroups: comp.os.linux.misc
Subject: Re: Why are hyperlinks blue?
Date: Tue, 31 Aug 2021 20:43:47 +0100
Organization: terraraq NNTP server
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References: <sg9pff$17a$1@gioia.aioe.org>
<m7ipvhxbkm.ln2@minas-tirith.valinor> <sgf1vt$g89$1@dont-email.me>
<sgfdtm$ich$1@dont-email.me> <eli$2108291744@qaz.wtf>
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X-Boydie: NO
 by: Richard Kettlewell - Tue, 31 Aug 2021 19:43 UTC

Eli the Bearded <*@eli.users.panix.com> writes:
> No stty manpage there to look for control character defaults. Erase,
> kill, etc, might not have made sense in early ASR-33 days. I wasn't
> there and don't know. BUT probably:

There are defaults in the V7 kernel:

#define CERASE '#' /* default special characters */
[...]
/*
* set default control characters.
*/
ttychars(tp)
register struct tty *tp;
{
tun.t_intrc = CINTR;
tun.t_quitc = CQUIT;
tun.t_startc = CSTART;
tun.t_stopc = CSTOP;
tun.t_eofc = CEOT;
tun.t_brkc = CBRK;
tp->t_erase = CERASE;
tp->t_kill = CKILL;
}

....and login:

gtty(0, &ttyb);
ttyb.sg_erase = '#';
ttyb.sg_kill = '@';
stty(0, &ttyb);

# for comments also turns up in ratfor and troff. The choice of # seems
quite inconvenient given the default terminal settings.

I’ve still not found any hard evidence of comment syntax in Multics’s
shell. The 636 version of runcom used * for a comment and $; the Multics
shell was apparently designed by the same person but none of the
documentation I’ve found online mentions any kind of comment syntax.

> Larry Wall probably used # for comments in Perl because AWK used # for
> comments. Guido van Rossum likely used # for comments because languages
> like AWK and Perl used # for comments.

That seems likely.

--
https://www.greenend.org.uk/rjk/

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