minor vi/vim qstn

[Gary Kline]

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 at thought.org  http://www.thought.org  Public Service Unix
             Twenty-seven years of service to the Unix community.
                            http://www.thought.org/HOPE