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

["Marko A. Rodriguez (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP3-723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582194#comment-14582194 ] 

Marko A. Rodriguez commented on TINKERPOP3-723:
-----------------------------------------------

[~mhfrantz] Can you do a PR for this?


> constant step
> -------------
>
>                 Key: TINKERPOP3-723
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP3-723
>             Project: TinkerPop 3
>          Issue Type: Improvement
>            Reporter: Matt Frantz
>
> 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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