[jira] [Work logged] (COLLECTIONS-795) provide a PairIterator to zip two iterators of different types.

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COLLECTIONS-795?focusedWorklogId=604626&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-604626 ]

ASF GitHub Bot logged work on COLLECTIONS-795:
----------------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Jun/21 17:04
            Start Date: 01/Jun/21 17:04
    Worklog Time Spent: 10m 
      Work Description: anantdamle commented on pull request #238:
URL: https://github.com/apache/commons-collections/pull/238#issuecomment-852291238


   What are the next steps?


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 604626)
    Time Spent: 3h  (was: 2h 50m)

> 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: 3h
>  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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