Keyboard shortcut - is there a principle behind them?

Keyboard shortcut - is there a principle behind them?

[Rainer M Krug]

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Hash: SHA1

Hi

one alternative subject could be "because it is Friday"...

I am using org-mode and ess regularly, and I use quite a few keyboard
shortcuts, but each time I read about a new one, I am wondering: why
the heck these specific (default!) keyboard shortcuts?

I am not asking why keyboard sequence, but e.g. why "export" in org is
C-c e and why tangle is C-c C-v t, and so on.

In other words: I am trying to *understand* why C-c and not C-o,
because I have tremendous problems to remember the shortcuts - if I
would know that there is s tree structure, where each following key
narrows it down to further *thematically linked* commands, it would
make it easier to learn these.

Any insight into this? Or is there a emacs function which returns a
random keyboard shortcut for a given function (some emacs shortcuts
really seem to be that way...).

Thanks,

Rainer


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

Fax (D):    +49 - (0)3 21 21 25 22 44

email:      Rainer@krugs.de

Skype:      RMkrug
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Re: Keyboard shortcut - is there a principle behind them?

[Oleh]

Initially the shortcuts were mnemonic, e.g.
C-e: `move-end-of-line'. Obviously the keys ran out pretty quick.
Now only few shortcuts are reserved for user space and plugins,
the most notable of which is the `C-c` prefix.
That's why most custom modes such as org-mode and ESS bind to shortcuts
with `C-c` prefix: there's a convention that Emacs core will not use `C-c`.

A nice way of remembering shortcuts only when you need them is to
call commands by name with `M-x`.
After a while, when you note that you're using one particular command
a lot, you'll want to learn the shortcut for it.

There's one package that might be of good use to you: `smex'.
It uses ido completion for `M-x`. You can install it from MELPA/Marmelade.
It binds automatically to `M-x` when you install, although I recommend:
(global-set-key "\C-t" 'smex)

As an example, say you want to tangle. Here's what you do:
C-t tang
Now you see a bunch of rectangle commands mixed into the bunch.
You can filter them out by noting that tangle commands have `org` in their name.
C-SPC org C-SPC
Now there's only 7 candidates left and you can select the one you want with C-m
either by cycling with C-s or continuing to type part of name.

`smex` logs the commands you use most. For them it usually takes less
than 2-3 characters
from the name to be recognized.
E.g. if you use `org-babel-tangle` a lot, you can usually call it with
C-t bab C-m.

Finally note that no shortcuts are set in stone. You can customize
all of them if you want to do so.
For instance, and probably a lot of people will disagree, it doesn't
make sense for me to have `previous-line' on C-p. So I swap C-p and C-h:
(keyboard-translate ?\C-h ?\C-p)
(keyboard-translate ?\C-p ?\C-h)

Oleh


On Fri, Dec 6, 2013 at 10:02 AM, Rainer M Krug <Rainer@krugs.de> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi
>
> one alternative subject could be "because it is Friday"...
>
> I am using org-mode and ess regularly, and I use quite a few keyboard
> shortcuts, but each time I read about a new one, I am wondering: why
> the heck these specific (default!) keyboard shortcuts?
>
> I am not asking why keyboard sequence, but e.g. why "export" in org is
> C-c e and why tangle is C-c C-v t, and so on.
>
> In other words: I am trying to *understand* why C-c and not C-o,
> because I have tremendous problems to remember the shortcuts - if I
> would know that there is s tree structure, where each following key
> narrows it down to further *thematically linked* commands, it would
> make it easier to learn these.
>
> Any insight into this? Or is there a emacs function which returns a
> random keyboard shortcut for a given function (some emacs shortcuts
> really seem to be that way...).
>
> Thanks,
>
> Rainer
>
>
> - --
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
> Biology, UCT), Dipl. Phys. (Germany)
>
> Centre of Excellence for Invasion Biology
> Stellenbosch University
> South Africa
>
> Tel :       +33 - (0)9 53 10 27 44
> Cell:       +33 - (0)6 85 62 59 98
> Fax :       +33 - (0)9 58 10 27 44
>
> Fax (D):    +49 - (0)3 21 21 25 22 44
>
> email:      Rainer@krugs.de
>
> Skype:      RMkrug
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Re: Keyboard shortcut - is there a principle behind them?

[Rainer M Krug]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



On 12/06/13, 10:49 , Oleh wrote:
> Initially the shortcuts were mnemonic, e.g. C-e:
> `move-end-of-line'. Obviously the keys ran out pretty quick.

I can really imagine. But this explains some - but following your
example: C-a moves to the beginning of the line - the only "a" there
is in "Anfang", which is German for "beginning". So only partial luck
here.

> Now only few shortcuts are reserved for user space and plugins, the
> most notable of which is the `C-c` prefix. That's why most custom
> modes such as org-mode and ESS bind to shortcuts with `C-c` prefix:
> there's a convention that Emacs core will not use `C-c`.

Ah - very good to know.

> 
> A nice way of remembering shortcuts only when you need them is to 
> call commands by name with `M-x`. After a while, when you note that
> you're using one particular command a lot, you'll want to learn the
> shortcut for it.

That's how I do it - but it involves learning sequences which do not
make any sense to me - and I am sure there is some sense in the
sequence, at least within each mode.

> 
> There's one package that might be of good use to you: `smex'. It
> uses ido completion for `M-x`. You can install it from
> MELPA/Marmelade. It binds automatically to `M-x` when you install,
> although I recommend: (global-set-key "\C-t" 'smex)

Yes - smex and ido are *very* useful - I do not know how one can use
emacs without them.

> 
> As an example, say you want to tangle. Here's what you do: C-t
> tang Now you see a bunch of rectangle commands mixed into the
> bunch. You can filter them out by noting that tangle commands have
> `org` in their name. C-SPC org C-SPC Now there's only 7 candidates
> left and you can select the one you want with C-m either by cycling
> with C-s or continuing to type part of name.
> 
> `smex` logs the commands you use most. For them it usually takes
> less than 2-3 characters from the name to be recognized. E.g. if
> you use `org-babel-tangle` a lot, you can usually call it with C-t
> bab C-m.

Very true and very useful.

> 
> Finally note that no shortcuts are set in stone. You can customize 
> all of them if you want to do so. For instance, and probably a lot
> of people will disagree, it doesn't make sense for me to have
> `previous-line' on C-p. So I swap C-p and C-h: (keyboard-translate
> ?\C-h ?\C-p) (keyboard-translate ?\C-p ?\C-h)

Absolutely true - but I usually try to keep the customization to a
minimum and to use the defaults.

Thanks,

Rainer

> 
> Oleh
> 
> 
> On Fri, Dec 6, 2013 at 10:02 AM, Rainer M Krug <Rainer@krugs.de>
> wrote: Hi
> 
> one alternative subject could be "because it is Friday"...
> 
> I am using org-mode and ess regularly, and I use quite a few
> keyboard shortcuts, but each time I read about a new one, I am
> wondering: why the heck these specific (default!) keyboard
> shortcuts?
> 
> I am not asking why keyboard sequence, but e.g. why "export" in org
> is C-c e and why tangle is C-c C-v t, and so on.
> 
> In other words: I am trying to *understand* why C-c and not C-o, 
> because I have tremendous problems to remember the shortcuts - if
> I would know that there is s tree structure, where each following
> key narrows it down to further *thematically linked* commands, it
> would make it easier to learn these.
> 
> Any insight into this? Or is there a emacs function which returns
> a random keyboard shortcut for a given function (some emacs
> shortcuts really seem to be that way...).
> 
> Thanks,
> 
> Rainer
> 
> 
>> 

- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

Fax (D):    +49 - (0)3 21 21 25 22 44

email:      Rainer@krugs.de

Skype:      RMkrug
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Re: Keyboard shortcut - is there a principle behind them?

[Jonathan Leech-Pepin]

Hello,

On 6 December 2013 05:01, Rainer M Krug <Rainer@krugs.de> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
>
> On 12/06/13, 10:49 , Oleh wrote:
>> Initially the shortcuts were mnemonic, e.g. C-e:
>> `move-end-of-line'. Obviously the keys ran out pretty quick.
>
> I can really imagine. But this explains some - but following your
> example: C-a moves to the beginning of the line - the only "a" there
> is in "Anfang", which is German for "beginning". So only partial luck
> here.

I can't speak for the original developers however my take on this one
is as follows:

C-b (for beginning) is used for "back"
C-s (for start) is used for "search", C-f (find) was "forward".
C-a becomes beginning-of-line by virtue of being the beginning of the alphabet.

Regards,
Jonathan

>> Now only few shortcuts are reserved for user space and plugins, the
>> most notable of which is the `C-c` prefix. That's why most custom
>> modes such as org-mode and ESS bind to shortcuts with `C-c` prefix:
>> there's a convention that Emacs core will not use `C-c`.
>
> Ah - very good to know.
>
>>
>> A nice way of remembering shortcuts only when you need them is to
>> call commands by name with `M-x`. After a while, when you note that
>> you're using one particular command a lot, you'll want to learn the
>> shortcut for it.
>
> That's how I do it - but it involves learning sequences which do not
> make any sense to me - and I am sure there is some sense in the
> sequence, at least within each mode.
>
>>
>> There's one package that might be of good use to you: `smex'. It
>> uses ido completion for `M-x`. You can install it from
>> MELPA/Marmelade. It binds automatically to `M-x` when you install,
>> although I recommend: (global-set-key "\C-t" 'smex)
>
> Yes - smex and ido are *very* useful - I do not know how one can use
> emacs without them.
>
>>
>> As an example, say you want to tangle. Here's what you do: C-t
>> tang Now you see a bunch of rectangle commands mixed into the
>> bunch. You can filter them out by noting that tangle commands have
>> `org` in their name. C-SPC org C-SPC Now there's only 7 candidates
>> left and you can select the one you want with C-m either by cycling
>> with C-s or continuing to type part of name.
>>
>> `smex` logs the commands you use most. For them it usually takes
>> less than 2-3 characters from the name to be recognized. E.g. if
>> you use `org-babel-tangle` a lot, you can usually call it with C-t
>> bab C-m.
>
> Very true and very useful.
>
>>
>> Finally note that no shortcuts are set in stone. You can customize
>> all of them if you want to do so. For instance, and probably a lot
>> of people will disagree, it doesn't make sense for me to have
>> `previous-line' on C-p. So I swap C-p and C-h: (keyboard-translate
>> ?\C-h ?\C-p) (keyboard-translate ?\C-p ?\C-h)
>
> Absolutely true - but I usually try to keep the customization to a
> minimum and to use the defaults.
>
> Thanks,
>
> Rainer
>
>>
>> Oleh
>>
>>
>> On Fri, Dec 6, 2013 at 10:02 AM, Rainer M Krug <Rainer@krugs.de>
>> wrote: Hi
>>
>> one alternative subject could be "because it is Friday"...
>>
>> I am using org-mode and ess regularly, and I use quite a few
>> keyboard shortcuts, but each time I read about a new one, I am
>> wondering: why the heck these specific (default!) keyboard
>> shortcuts?
>>
>> I am not asking why keyboard sequence, but e.g. why "export" in org
>> is C-c e and why tangle is C-c C-v t, and so on.
>>
>> In other words: I am trying to *understand* why C-c and not C-o,
>> because I have tremendous problems to remember the shortcuts - if
>> I would know that there is s tree structure, where each following
>> key narrows it down to further *thematically linked* commands, it
>> would make it easier to learn these.
>>
>> Any insight into this? Or is there a emacs function which returns
>> a random keyboard shortcut for a given function (some emacs
>> shortcuts really seem to be that way...).
>>
>> Thanks,
>>
>> Rainer
>>
>>
>>>
>
> - --
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
> Biology, UCT), Dipl. Phys. (Germany)
>
> Centre of Excellence for Invasion Biology
> Stellenbosch University
> South Africa
>
> Tel :       +33 - (0)9 53 10 27 44
> Cell:       +33 - (0)6 85 62 59 98
> Fax :       +33 - (0)9 58 10 27 44
>
> Fax (D):    +49 - (0)3 21 21 25 22 44
>
> email:      Rainer@krugs.de
>
> Skype:      RMkrug
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Re: [ESS] Keyboard shortcut - is there a principle behind them?

[Tyler Smith]

Rainer M Krug <Rainer@krugs.de> wrote:
>On 12/06/13, 10:49 , Oleh wrote:
>
>> Now only few shortcuts are reserved for user space and plugins, the
>> most notable of which is the `C-c` prefix. That's why most custom
>> modes such as org-mode and ESS bind to shortcuts with `C-c` prefix:
>> there's a convention that Emacs core will not use `C-c`.

To be clear, C-c followed by another modified key (C-x, for example) is reserved for major modes. C-c followed by a regular letter (e.g. C-c x) is reserved for use by the user, and should not be used by major modes.

Tyler

Re: Keyboard shortcut - is there a principle behind them?

[Vitalie Spinu]

Try https://github.com/emacs-helm/helm-descbinds . It will make your
life with million emacs keys much easier.

I can comment on ESS. Most of the shortcuts are actually mnemonic and
hierarchical (C-c C-d for doc-map,  C-c C-e for extra-map, C-c C-t for
dev-map which includes mostly [t]racebug). Some common shortcuts are
there because they are easy to type like C-c C-z to switch to subprocess
and back; C-RET to send a line etc


  Vitalie


 >>> Rainer M Krug on Fri, 06 Dec 2013 10:02:33 +0100 wrote:

 > Hi

 > one alternative subject could be "because it is Friday"...

 > I am using org-mode and ess regularly, and I use quite a few keyboard
 > shortcuts, but each time I read about a new one, I am wondering: why
 > the heck these specific (default!) keyboard shortcuts?

 > I am not asking why keyboard sequence, but e.g. why "export" in org is
 > C-c e and why tangle is C-c C-v t, and so on.

 > In other words: I am trying to *understand* why C-c and not C-o,
 > because I have tremendous problems to remember the shortcuts - if I
 > would know that there is s tree structure, where each following key
 > narrows it down to further *thematically linked* commands, it would
 > make it easier to learn these.

 > Any insight into this? Or is there a emacs function which returns a
 > random keyboard shortcut for a given function (some emacs shortcuts
 > really seem to be that way...).

 > Thanks,

 > Rainer

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Re: Keyboard shortcut - is there a principle behind them?

[Matthew Fidler]

See

http://www.gnu.org/software/emacs/manual/html_node/elisp/Key-Binding-Conventions.html
On Dec 6, 2013 3:02 AM, "Rainer M Krug" <Rainer@krugs.de> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi
>
> one alternative subject could be "because it is Friday"...
>
> I am using org-mode and ess regularly, and I use quite a few keyboard
> shortcuts, but each time I read about a new one, I am wondering: why
> the heck these specific (default!) keyboard shortcuts?
>
> I am not asking why keyboard sequence, but e.g. why "export" in org is
> C-c e and why tangle is C-c C-v t, and so on.
>
> In other words: I am trying to *understand* why C-c and not C-o,
> because I have tremendous problems to remember the shortcuts - if I
> would know that there is s tree structure, where each following key
> narrows it down to further *thematically linked* commands, it would
> make it easier to learn these.
>
> Any insight into this? Or is there a emacs function which returns a
> random keyboard shortcut for a given function (some emacs shortcuts
> really seem to be that way...).
>
> Thanks,
>
> Rainer
>
>
> - --
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
> Biology, UCT), Dipl. Phys. (Germany)
>
> Centre of Excellence for Invasion Biology
> Stellenbosch University
> South Africa
>
> Tel :       +33 - (0)9 53 10 27 44
> Cell:       +33 - (0)6 85 62 59 98
> Fax :       +33 - (0)9 58 10 27 44
>
> Fax (D):    +49 - (0)3 21 21 25 22 44
>
> email:      Rainer@krugs.de
>
> Skype:      RMkrug
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG/MacGPG2 v2.0.22 (Darwin)
> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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> ______________________________________________
> ESS-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/ess-help
>

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Re: [ESS] Keyboard shortcut - is there a principle behind them?

[Rainer M Krug]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Thanks a lot everybody - the key bindings in emaaqcs are (a little b
it) clearer now.

Cheers

Rainer

On 12/07/13, 07:35 , Matthew Fidler wrote:
> See
> 
> http://www.gnu.org/software/emacs/manual/html_node/elisp/Key-Binding-Conventions.html
>
>  On Dec 6, 2013 3:02 AM, "Rainer M Krug" <Rainer@krugs.de 
> <mailto:Rainer@krugs.de>> wrote:
> 
> Hi
> 
> one alternative subject could be "because it is Friday"...
> 
> I am using org-mode and ess regularly, and I use quite a few
> keyboard shortcuts, but each time I read about a new one, I am
> wondering: why the heck these specific (default!) keyboard
> shortcuts?
> 
> I am not asking why keyboard sequence, but e.g. why "export" in org
> is C-c e and why tangle is C-c C-v t, and so on.
> 
> In other words: I am trying to *understand* why C-c and not C-o, 
> because I have tremendous problems to remember the shortcuts - if
> I would know that there is s tree structure, where each following
> key narrows it down to further *thematically linked* commands, it
> would make it easier to learn these.
> 
> Any insight into this? Or is there a emacs function which returns
> a random keyboard shortcut for a given function (some emacs
> shortcuts really seem to be that way...).
> 
> Thanks,
> 
> Rainer
> 
> 
> 
> ______________________________________________ 
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- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

Fax (D):    +49 - (0)3 21 21 25 22 44

email:      Rainer@krugs.de

Skype:      RMkrug
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