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Posted to issues@commons.apache.org by "Peter De Maeyer (Jira)" <ji...@apache.org> on 2024/10/20 18:36:00 UTC

[jira] [Commented] (COLLECTIONS-871) Add a LinkedHashSetValuedLinkedHashMap to preserve unicity and insertion order

    [ https://issues.apache.org/jira/browse/COLLECTIONS-871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17891314#comment-17891314 ] 

Peter De Maeyer commented on COLLECTIONS-871:
---------------------------------------------

I'll create a PR for this soon.

> Add a LinkedHashSetValuedLinkedHashMap to preserve unicity and insertion order
> ------------------------------------------------------------------------------
>
>                 Key: COLLECTIONS-871
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-871
>             Project: Commons Collections
>          Issue Type: New Feature
>          Components: Map
>    Affects Versions: 4.5.0-M2
>            Reporter: Peter De Maeyer
>            Priority: Major
>
> Add a {{LinkedHashSetValuedLinkedHashMap}}, to complement the existing {{MultiValuedMap}} implementations.
> COLLECTIONS-533 adds a {{ArrayListValuedLinkedHashMap}}, which is similar to {{ArrayListValuedHashMap}} but additionally preserves insertion order. One could envision a similar {{LinkedHashSetValuedLinkedHashMap}}, which does the same compared to {{HashSetValuedHashMap}}.



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