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Posted to issues@commons.apache.org by "Thomas Neidhart (JIRA)" <ji...@apache.org> on 2013/04/28 16:00:16 UTC
[jira] [Comment Edited] (COLLECTIONS-296) Introduce
SortedUtils.merge() for merging sorted collections
[ https://issues.apache.org/jira/browse/COLLECTIONS-296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644010#comment-13644010 ]
Thomas Neidhart edited comment on COLLECTIONS-296 at 4/28/13 2:00 PM:
----------------------------------------------------------------------
I did improve the implementation by re-using a CollatingIterator, and also decided to rename the merge methods to collate, which is clearer imho (in r1476770).
was (Author: tn):
I did improve the implementation by re-using a CollatingIterator, and also decided to rename the merge methods to collate, which is clearer imho.
> Introduce SortedUtils.merge() for merging sorted collections
> ------------------------------------------------------------
>
> Key: COLLECTIONS-296
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-296
> Project: Commons Collections
> Issue Type: New Feature
> Components: Core
> Reporter: Julius Davies
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SortedUtils.patch
>
>
> Is there any interest in this?
> /**
> * Returns a new ArrayList where sorted Collection a and sorted Collection b
> * are combined such that ordering of the elements according to
> * Comparator c is retained. Uses the standard O(n) merge algorithm
> * for combining two sorted lists.
> *
> * @param a Object to combine with sorted Collection b. Must implement Comparable.
> * @param b Sorted Collection to combine with Object a.
> * @param c Comparator by which Collection a and Collection b have been sorted, or null
> * if the Collections are sorted according to their natural ordering.
> * @return a new sorted ArrayList
> */
> public static ArrayList merge(Collection a, Collection b, Comparator c);
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