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https://issues.apache.org/jira/browse/TINKERPOP-2520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17933131#comment-17933131
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Cole Greer commented on TINKERPOP-2520:
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Since this JIRA was opened, the reverse() step has been added:
https://tinkerpop.apache.org/docs/3.7.3/reference/#reverse-step
This generally covers the behaviour described here, and it will be able to
reverse a path, the only caveat is the output will always be a list. I am going
to close this for now. Feel free to reopen if there is a desire to somehow
retain the path type through reversal.
> Add the ability to reverse the stream or a collection
> -----------------------------------------------------
>
> Key: TINKERPOP-2520
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2520
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.4.10
> Reporter: Kelvin R. Lawrence
> Priority: Minor
> Labels: breaking
>
> I had a Gremlin user ask me yesterday if there was a way to have the results
> of a `path` step be reversed. Today you cannot do that using `from` and `to`
> steps as the `from` label must appear before the `to` label in a path. In
> thinking about this, perhaps adding a `reverse` option to order (on top of
> `asc`,`desc` and `shuffle`) would be a nice addition to Gremlin. So you could
> write something like:
> {code:java}
> g.V().out().out().path().order(local).by(reverse){code}
> For this specific user they were union-ing a set of paths in different
> directions and wanted to normalize them to all be in the same direction when
> presented as results.
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