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Posted to dev@tinkerpop.apache.org by "Daniel Kuppitz (JIRA)" <ji...@apache.org> on 2015/07/17 17:31:04 UTC

[jira] [Closed] (TINKERPOP3-723) constant step

     [ https://issues.apache.org/jira/browse/TINKERPOP3-723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Kuppitz closed TINKERPOP3-723.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0-incubating

> constant step
> -------------
>
>                 Key: TINKERPOP3-723
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP3-723
>             Project: TinkerPop 3
>          Issue Type: Improvement
>          Components: process
>    Affects Versions: 3.0.0-incubating
>            Reporter: Matt Frantz
>            Assignee: Daniel Kuppitz
>             Fix For: 3.0.0-incubating
>
>
> The proposed {{constant}} step would be like a {{map}} that always returns the same value.  It is most useful as an {{option}} or as an argument of {{coalesce}} or {{branch}}.
> {noformat}
> gremlin> g.V().coalesce(__.hasLabel('person').values('name'), __.constant('nonperson'))
> gremlin> g.V().coalesce(__.hasLabel('person').values('name'), __.map{it -> 'nonperson'})
> ==>marko
> ==>vadas
> ==>nonperson
> ==>josh
> ==>nonperson
> ==>peter
> {noformat}
> It was mentioned by [~dkuppitz] in the comments of TINKERPOP3-700.



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