Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: pass (athena.apache.org: domain of carl.bourne@me.com designates
 17.158.236.238 as permitted sender)
MIME-version: 1.0
Content-type: text/plain; charset=windows-1252
Subject: Re: Exclude documents from view based on list of regex expressions
From: Carl Bourne <carl.bourne@me.com>
In-reply-to: <C57E5D3D-7F92-4F1A-B1BE-E4DB4ED1EC93@me.com>
Date: Tue, 18 Sep 2012 20:46:16 +0100
Content-transfer-encoding: quoted-printable
Message-id: <6C6DA708-2F30-442F-A87C-3A346B829612@me.com>
References: <91593B54-D63F-47A6-BB7F-0B176D705C78@me.com>
 <DB473E6B-93CC-4E26-8322-D0FBB70583EE@utt.fr>
 <A19A52BA-5774-4BF7-BA2D-0876FB0F44EA@utt.fr>
 <FAF96E44-DBE1-41C8-80D8-9AFE3E31B0DC@couchbase.com>
 <C57E5D3D-7F92-4F1A-B1BE-E4DB4ED1EC93@me.com>
To: user@couchdb.apache.org

>>However, I'm puzzled as I would expect it to only return the documents =
that match the regex NOT the ones that don't. I can't see a NOT operator =
in the syntax anywhere!

OK sorry - stupid question its an IF/ELSE statement. I'm more familiar =
with Ruby so sorry to appear dumb!


On 18 Sep 2012, at 19:57, Carl Bourne <carl.bourne@me.com> wrote:

> Gentlemen,=20
>=20
> OK so this works exactly how I would like it to:
>=20
> function(doc) {
> var reg_exps =3D [/ORA/g, /Hew/g, /VM/g];
> for (r in reg_exps){
>   if (doc.subject.name.match(reg_exps[r])){
>     return;
>   }
> }
> emit(doc.subject.organisation_name, 1);
> }
>=20
> However, I'm puzzled as I would expect it to only return the documents =
that match the regex NOT the ones that don't. I can't see a NOT operator =
in the syntax anywhere!
>=20
> I haven't tried the compound regex yet though!
>=20
>=20
> On 18 Sep 2012, at 18:24, Jens Alfke <jens@couchbase.com> wrote:
>=20
>>=20
>> On Sep 18, 2012, at 10:17 AM, Aur=E9lien B=E9nel =
<aurelien.benel@utt.fr<mailto:aurelien.benel@utt.fr>> wrote:
>>=20
>> Are you sure an array of regexes would be as efficient as a compound =
regex?
>>=20
>> Good point =97 I don=92t know the innards of SpiderMonkey but I think =
it=92s pretty much a guarantee that a compound regex would be much =
faster. In general the fewer times you have to jump out of or into an =
interpreter (meaning both JS and the regex state-machine) the better.
>>=20
>> If I recall the syntax correctly, it would look like /bar|baz/ =85 =
right?
>>=20
>> =97Jens
>>=20
>=20