Date: Thu, 26 Sep 2013 12:51:32 -0700 From: Gary Kline <kline@thought.org> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: minor vi/vim qstn Message-ID: <20130926195132.GA24184@ethic.thought.org> In-Reply-To: <20130926152629.89e6dd72.freebsd@edvax.de> References: <20130925212741.GA19434@ethic.thought.org> <20130926002327.6502d1b9.freebsd@edvax.de> <20130926002104.GA12932@ethic.thought.org> <20130926030600.8850ddc5.freebsd@edvax.de> <20130926024708.GA3908@ethic.thought.org> <20130926152629.89e6dd72.freebsd@edvax.de>
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Organization: Thought Unlimited. Public service Unix since 1986.
Of_Interest: With 27 years of service to the Unix community.
On Thu, Sep 26, 2013 at 03:26:29PM +0200, Polytropon wrote:
> On Wed, 25 Sep 2013 19:47:08 -0700, Gary Kline wrote:
> > dunno how you know im using the zsh, but yup.
>
> This is because of my magical allknowinglyness. :-)
>
> You wrote:
>
> > > > pts/14 17:11 <tao> [5011] vi!
> > > > zsh: command not found: vi!
> ^^^
> This gave me the impression you're using the Z shell.
>
> The C shell says:
>
> % vi!
> vi!: Command not found.
>
> And bash says:
>
> $ vi!
> bash: vi!: command not found
>
> So the shell that says "zsh" should be the Z shell, or a different
> shell that's just lying. :-)
Oh, noooooooooooo! ive got to go hide my head in the sand for 25
years... { it's so emmbarrassing!!}
>
> > with the bang stuff
> > if you do a
> >
> > % !-3
> >
> > you go back three vi cmds. !-N, N cmds.
>
> Yes, this also works in C shell. You can use the "h" (or "history")
> builtin command to get an impression of content of the last commands
> submitted to the shell.
>
> At least in csh,
>
> % !-1
>
> equals
>
> % !!
>
> and repeats the last command.
>
> You could use the following command to print the last 20 commands
> with the relative number (-1, -2, -3 and so on) printed infront of
> them:
>
> % history 20 | awk 'BEGIN {cmds=20} { printf("\t%2d\t%s\n", -(cmds-i), $0); i++ }'
>
> It's probably a good idea to define an alias for that, like "h20"
> (history of last 20 commands).
my zsh does a default to 10 or so history with just
% h
I was trying to remember how to set it to ,, say, 100.
I use as many zsh-isms as saves keystrokes. thanks for that
awk shortcut; ill use ir... :_)
> You could also use the zsh's equivalent of the "precmd" alias: It
> is a command that will be executed prior to displaying the shell
> prompt, so after you're done with a command, the last commands
> (maybe shortened to 10, just substitute the two appearances of
> the "20" to "10") will be displayed before the prompt appears;
> this will make it easier (and save keystrokes) to check the last
> commands and maybe repeat one.
>
> Downside: The command "pollutes" the list of commands with itself,
> so it should probably be grepped away.
good grief, man. I just got up from a nap... can you re-word that?
no, kidding. I get it.
(for as many centuries as ive been using vi [nvi], there are
*still* things I never had need to learn. so it turns out that
a lot of theses "clever" sh scripts are over my head .... it
takes mins -> hours to figure out.
>
> % history 20 | awk 'BEGIN {cmds=20} { printf("\t%2d\t%s\n", -(cmds-i), $0); i++ }' | grep -v "history"
>
> It might be good to define a better exclusion pattern than just
> "history" because that might lead to false-positives. I'd suggest
> to rename the variables in the awk script to something unique and
> then grep for those instead...
>
I have grep -v aliased to grv.
>
> > thankfully there are shortcuts!
>
> And shell aliases. :-)
>
>
>
> > ps: zsh is sort of a ksh clone; I remember porting the zsh onto
> > my 286 in 1989. got a lot of csh-isms :)
>
> The Z shell combines nice interactive features of the C shell
> (to be correct: the tcsh) and the scripting features of sh and
> bash. It's considered one of the most powerful shells. So it's
> a wise move to use it, because it combines "the _good_ things of
> both worlds" (and not the bad things, as the csh is a terrible
> scripting shell, just as plain sh is an awful dialog shell).
>
>
>
> --
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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--
Gary Kline kline@thought.org http://www.thought.org Public Service Unix
Twenty-seven years of service to the Unix community.
http://www.thought.org/HOPE
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