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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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