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https://issues.apache.org/jira/browse/COLLECTIONS-795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Anant Damle updated COLLECTIONS-795:
------------------------------------
Description:
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}
was:
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}
> 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: 1.5h
> 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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