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Re: Interactive search on the command line?
- X-seq: zsh-users 21038
- From: Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>
- To: Scott Frazer <frazer.scott@xxxxxxxxx>
- Subject: Re: Interactive search on the command line?
- Date: Thu, 3 Dec 2015 23:39:26 +0000
- Cc: zsh-users@xxxxxxx
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Scott Frazer wrote on Wed, Dec 02, 2015 at 08:15:57 -0500:
> On Sun, Nov 29, 2015 at 10:19 PM, Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>
> wrote:
>
> > I wouldn't know you were new to zsh if you didn't say so; the code looks
> > as good as anyone's. The one thing I would suggest is to use the
> > ${BUFFER[(i)$char]} syntax in the 'for' loop, which should translate to
> > a strchr() or strstr() call at the C level. (There's also the
> > ${(ps:$char:)BUFFER} syntax, but I'm not sure it gains you anything.)
> >
> >
> I tried the (i) thing but the function stopped working. I couldn't
> find what it was supposed to do in the zsh manual, only something
> about use as a flag for case-insensitive search which doesn't seem
> relevant.
A parenthesized "i" after an opening brace of parameter substitution
means "sort case-insensitively":
% a=(Foo bar) ; print ${(oi)a}
bar Foo
A parenthesized "i" after a subscript's bracket is a strstr() flag:
% s=foobar x=b
% print ${s[(i)$x]}
4
The latter is documented in "Subscript Flags" in zshparam(1). (It took
me a little while to find that; I checked zshexpn(1) first.)
So, you could do something like this (using the (b::) subscript flag as
well):
% () {
local haystack="$1"
local needle="a"
integer idx
while (( idx = ${haystack[(ib:idx+1:)${needle}]} ))
(( idx <= $#haystack ))
do
print -r - $haystack[idx,idx+$#needle-1]
done
} foobar
a
%
> How do people debug these types of things?
You mean, how people look up flags? Just type ": ${(" and then press
<TAB>.
>
> > Also, three minor points:
> >
> > - With recent zsh, WARN_CREATE_GLOBAL complains:
> > (anon):1: scalar parameter ZSH_JUMP_TARGET_CHOICES created globally in
> > function (anon)
> > (anon):2: scalar parameter ZSH_JUMP_TARGET_STYLE created globally in
> > function (anon)
> > The fix is to declare these parameters either global ('typeset -g') or
> > 'local'.
> >
> > - You could use 'region_highlight+=("foo bar baz")' to append to the array.
> >
> > - You might use an 'always' block to restore $orig_region_highlight.
> >
> > P.S. Perhaps you could throw a LICENSE file into that repository?
> >
> >
> Thanks for the feedback, I fixed all these things.
Thanks, LGTM.
Daniel
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