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https://issues.apache.org/jira/browse/GROOVY-2456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King updated GROOVY-2456:
------------------------------
    Attachment:     (was: deliveryreport.txt)

> Support in-Keyword for Strings
> ------------------------------
>
>                 Key: GROOVY-2456
>                 URL: https://issues.apache.org/jira/browse/GROOVY-2456
>             Project: Groovy
>          Issue Type: New Feature
>          Components: groovy-jdk
>    Affects Versions: 1.5.1
>            Reporter: Paul King
>            Priority: Major
>              Labels: breaking, breaking_change
>         Attachments: deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, deliveryreport.txt, deliveryreport.txt, 
> deliveryreport.txt, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml, originalmail.eml, 
> originalmail.eml, originalmail.eml, originalmail.eml
>
>
> assert 'abc'.contains('a') //1
> assert 'a' in ('abc'as List) //2
> assert 'a' in 'abc' //3 this breaks
> You ask a string if a substring is contained in it (//1). You can do that 
> with the in-Keyword with Lists (//2), too. But you can't do this with the 
> in-Keyword with Strings. It would be a consistent behaviour from Groovy if 
> you could do //3.



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