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Message-ID: <e282921e0811091401n250f2491pb42d319d2e4bda2@mail.gmail.com>
Date: Sun, 9 Nov 2008 14:01:48 -0800
From: "Chris Anderson" <jchris@apache.org>
Sender: jchris@gmail.com
To: couchdb-user@incubator.apache.org
Subject: Re: dual purpose filter/count views
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References: <E36474A8-21B6-4B77-BF7C-81378DC56D9D@gmail.com>

On Sun, Nov 9, 2008 at 1:36 PM, Sho Fukamachi <sho.fukamachi@gmail.com> wrote:


> map: function(doc) {
>  if (doc.type == 'my_doc') emit(doc.field, [doc, 1]);
>    }
> reduce: function(keys, values) { return sum(values[1]) }

Anthony's second email has a working idea, but this is how I like to
do it. Will work for any map function, so you can drop the funny array
value from your map.

Reduce:

function(keys, values, rereduce) {
  if (rereduce) {
    return sum(values);
  } else {
    return values.length;
  }
}


-- 
Chris Anderson
http://jchris.mfdz.com