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https://issues.apache.org/jira/browse/COLLECTIONS-795?focusedWorklogId=606864&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-606864
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ASF GitHub Bot logged work on COLLECTIONS-795:
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Author: ASF GitHub Bot
Created on: 04/Jun/21 08:32
Start Date: 04/Jun/21 08:32
Worklog Time Spent: 10m
Work Description: anantdamle commented on pull request #238:
URL:
https://github.com/apache/commons-collections/pull/238#issuecomment-854278433
@garydgregory there is one big difference with ZippingIterator,
ZippingIterator allows iterating over iteratord of same generic type, whereas
the proposed solution allows using two different types and hence needs a Pair
equivalent class.
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Issue Time Tracking
-------------------
Worklog Id: (was: 606864)
Time Spent: 5.5h (was: 5h 20m)
> provide a PairIterator to zip two iterators of different types.
> ---------------------------------------------------------------
>
> Key: COLLECTIONS-795
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-795
> Project: Commons Collections
> Issue Type: New Feature
> Components: Iterator
> Reporter: Anant Damle
> Priority: Minor
> Time Spent: 5.5h
> Remaining Estimate: 0h
>
> ZippingIterator provides a way to simulatenously iterate over multiple
> iterators of the *same-type.*
> The proposed pair iterator allows simultaneously iterating over two iterators
> of different type, like the example below:
> {code:java}
> Iterator<L> leftIterator = ...;
> Iterator<R> rightIterator = ...;
> PairIterator<L,R> pairIterator = PairIterator.of(leftIterator, rightIterator);
> while (pairIterator.hasNext()) {
> ImmutablePair<L,R> item = pairIterator.next();
> ...
> }{code}
>
> Another convenience could be to use an Iterable for easy for-each constructs.
> {code:java}
> List<Integer> studentIds = ...
> List<String> studentNames = ...
> for (PairedItem<Integer, String> items :
> IterableUtils.pairedIterable(studentIds, studentNames) {
> Integer studentId = item.getLeft();
> String studentName = item.getRight();
> ...
> }
> {code}
>
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