From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-21038-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 12461 invoked by alias); 3 Dec 2015 23:39:34 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
X-Seq: 21038
Received: (qmail 15547 invoked from network); 3 Dec 2015 23:39:32 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_DKIM_INVALID
	autolearn=ham autolearn_force=no version=3.4.0
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=
	daniel.shahaf.name; h=cc:content-type:date:from:in-reply-to
	:message-id:mime-version:references:subject:to:x-sasl-enc
	:x-sasl-enc; s=mesmtp; bh=zxrVug8Fj2mmFZ7p/bHRFYUzQxI=; b=zTfUr3
	TuZ77h8c2wsxFBEtWuxeOkpI/7gBrFN4sGPQXdd0+EKIfa3fGAEVY8gyq9BFgpEm
	NysSy9u1vupKrMVUInDXtbT4JMWHfuejdufHloxFQONGTiKBg6MFO6SAqQLnhBEF
	uf17Y5ho7JsE2uLiNf3wiC7OGJsjeFjoQb7EA=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=
	messagingengine.com; h=cc:content-type:date:from:in-reply-to
	:message-id:mime-version:references:subject:to:x-sasl-enc
	:x-sasl-enc; s=smtpout; bh=zxrVug8Fj2mmFZ7p/bHRFYUzQxI=; b=TXtyu
	ANTuwuYciU62pTRuR4popBiU210+uFYO2FVlcpTHLVMS2nK81FK6G1W+zU0KEL1H
	sckzyp0rZlcLvGaMXMlIEJZItBA8ItQhrf/lAzjAKrtZ/BbsTYiCGzDCSVtBkwXj
	XKcINoX7txiGct8018nnXxYxz5f8dkdPxUUiHE=
X-Sasl-enc: SBhHd8XexRm5bXtDwhdvBd627sQo+IOevIOUYXpB8nIF 1449185968
Date: Thu, 3 Dec 2015 23:39:26 +0000
From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: Scott Frazer <frazer.scott@gmail.com>
Cc: zsh-users@zsh.org
Subject: Re: Interactive search on the command line?
Message-ID: <20151203233926.GF1955@tarsus.local2>
References: <20151126080400.GA20074@linux.vnet.ibm.com>
 <565B723B.70900@gmail.com>
 <20151130031915.GD2504@tarsus.local2>
 <CAGjUN-TEPKNr3fKfUvL1JBtZN9y2jrw9m1kjstggEeR+12gjcA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAGjUN-TEPKNr3fKfUvL1JBtZN9y2jrw9m1kjstggEeR+12gjcA@mail.gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)

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@daniel.shahaf.name>
> 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