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https://issues.apache.org/jira/browse/GROOVY-10473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17489084#comment-17489084
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Eric Milles commented on GROOVY-10473:
--------------------------------------
I also ran into the missing head/tail problem:
https://stackoverflow.com/questions/19803058/java-8-stream-getting-head-and-tail
I went with:
{code:groovy}
stream.iterator().with {
if (hasNext()) {
def head = next()
forEachRemaining(/* tail consumer */)
}
}
{code}
Not sure if there is an opportunity to generalize this...
> Extend streams support to spread and subscript
> ----------------------------------------------
>
> Key: GROOVY-10473
> URL: https://issues.apache.org/jira/browse/GROOVY-10473
> Project: Groovy
> Issue Type: Improvement
> Reporter: Eric Milles
> Priority: Major
>
> Groovy 3 and 4 added some {{Stream}} extension methods like {{plus}},
> {{toList}} and {{toArray}}. And some default type conversions like
> {{String[] array = stream;}}. This could be taken further by having
> spread-dot and subscript support:
> {code:groovy}
> stream*.thing // --> stream.map(it -> it.thing).toList()
> stream[1] // --> stream.skip(1).findFirst().orElse(null)
> stream[1..10] // --> stream.skip(1).limit(10-1).toList()
> // consider negative indexes and reverse ranges
> {code}
> Also, {{forEachPair}} and {{zip}} extension methods would be useful for
> processing parallel streams.
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