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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <151203165950.ZM13362@torch.brasslantern.com>
Date: Thu, 3 Dec 2015 16:59:50 -0800
In-Reply-To: <20151203233926.GF1955@tarsus.local2>
Comments: In reply to Daniel Shahaf <d.s@daniel.shahaf.name>
        "Re: Interactive search on the command line?" (Dec  3, 11:39pm)
References: <20151126080400.GA20074@linux.vnet.ibm.com> 
	<565B723B.70900@gmail.com> 
	<20151130031915.GD2504@tarsus.local2> 
	<CAGjUN-TEPKNr3fKfUvL1JBtZN9y2jrw9m1kjstggEeR+12gjcA@mail.gmail.com> 
	<20151203233926.GF1955@tarsus.local2>
X-Mailer: OpenZMail Classic (0.9.2 24April2005)
To: zsh-users@zsh.org
Subject: Re: Interactive search on the command line?
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

On Dec 3, 11:39pm, Daniel Shahaf wrote:
}
} 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
}     % 

This example might be a little clearer if we show the index where the
match was found and use a match pattern longer than one character:

% () {
    local haystack=$1 needle=$2
    integer idx
    while idx=${haystack[(ib:idx+1:)$needle]}
	  (( idx <= $#haystack ))
    do
      print -r - $idx $haystack[idx,idx+$#needle-1]
    done
  } foobar 'o??'
2 oob
3 oba
% 

(I also removed all redundant quotes and braces, since the original
would only work in native zsh emulation anyway.)