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https://issues.apache.org/jira/browse/GROOVY-11586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17938913#comment-17938913
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ASF GitHub Bot commented on GROOVY-11586:
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paulk-asert opened a new pull request, #2166:
URL: https://github.com/apache/groovy/pull/2166
(no comment)
> Provide an injectAll DGM method
> -------------------------------
>
> Key: GROOVY-11586
> URL: https://issues.apache.org/jira/browse/GROOVY-11586
> Project: Groovy
> Issue Type: Improvement
> Reporter: Paul King
> Priority: Major
>
> Streams have both reduce and scan (in gatherers as part of JDK 24). Groovy
> has inject for reduce but no equivalent for scan. The intention is to provide
> injectAll to provide this:
> {code:groovy}
> assert (1..3).injectAll(''){ carry, next -> carry + next } == ['1', '12',
> '123']
> var runningAvg = [1.0, 2.0, 3.0].injectAll([0.0, 0, null]){ accum, next ->
> var total = accum[0] + next
> var count = accum[1] + 1
> [total, count, total/count]
> }
> assert runningAvg*.get(2) == [1.0, 1.5, 2.0]
> assert [a:1, b:2, c:3].injectAll('') { carry, k, v ->
> carry + k * v
> } == ['a', 'abb', 'abbccc']
> {code}
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