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From "afters (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-925) altering 'doc' variable in map function affects other map functions
Date Thu, 25 Nov 2010 11:15:13 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935723#action_12935723
] 

afters commented on COUCHDB-925:
--------------------------------

You're right, it does. It's actually a pretty sane behaviour.

Thanks Filipe, and Paul.

> altering 'doc' variable in map function affects other map functions
> -------------------------------------------------------------------
>
>                 Key: COUCHDB-925
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-925
>             Project: CouchDB
>          Issue Type: Bug
>    Affects Versions: 1.0.1
>         Environment: Erlang R13B03, Spidermonkey 1.7, Ubuntu 10.04
>            Reporter: afters
>            Assignee: Filipe Manana
>         Attachments: COUCHDB-925.patch
>
>
> I have the following two map functions (v1.0.1):
> function (doc) {
>   emit(doc.path[0], null);
> }
> function (doc) {
>  doc.path = [ 'an intruder from another view' ];
> }
> When the views are built, the first map function sees a 'doc' variable that
> was changed by the second map function, and thus emits the key 'an intruder
> from another view'.
> The real documents remain untouched.

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