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https://issues.apache.org/jira/browse/TINKERPOP-1639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15882966#comment-15882966
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pieter martin commented on TINKERPOP-1639:
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Another operation to think about is casting.
It is often the case that when the data is loaded the proper type is not known 
and the property is captured as a `String`. Later an analyst or whoever 
actually understands the data can cast it to the proper type and do further 
manipulations on it.

> Support simple String operations
> --------------------------------
>
>                 Key: TINKERPOP-1639
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1639
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: process
>    Affects Versions: 3.2.4
>            Reporter: Daniel Kuppitz
>            Assignee: Daniel Kuppitz
>             Fix For: 3.3.0, 3.2.5
>
>
> Addd support for simple String operations, e.g. {{length()}} and 
> {{substring()}}. The latter will also allow us to write {{startsWith()}} and 
> {{endsWith()}} filters.



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