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https://issues.apache.org/jira/browse/GROOVY-11636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17947198#comment-17947198
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Paul King edited comment on GROOVY-11636 at 4/25/25 2:31 AM:
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I added previous.
{code:groovy}
assert (0..9).collect('🍌'::previous).join() == '🍌🍋🍊🍉🍈🍇🍆🍅🍄🍃'
assert '🍑'.previous(5) == '🍌'
assert 'e'.previous(4) == 'a'
assert (0..4).collect('z'::previous) == 'z'..'v'
{code}
was (Author: paulk):
I added previous.
> Create SGM#next/previous methods which act like next/previous but also takes
> an integer repeat count
> ----------------------------------------------------------------------------------------------------
>
> Key: GROOVY-11636
> URL: https://issues.apache.org/jira/browse/GROOVY-11636
> Project: Groovy
> Issue Type: New Feature
> Reporter: Paul King
> Assignee: Paul King
> Priority: Major
>
> Trying to get from String 'a' to 'e' by "adding 4" can be cumbersome, either
> calling next() multiple times, or converting to a char, doing the arithmetic,
> then converting back.
> The idea would be to support:
> {code:groovy}
> assert 'a'.next(0) == 'a'
> assert 'a'.next(4) == 'e'
> assert 'a'.next(0) == 'a'
> assert 'a'.next(25) == 'z'
> assert 'A'.next(32) == 'a'
> assert (0..4).collect('a'::next) == 'a'..'e'
> assert 'car'.next(2) == 'cat'
> {code}
> Although hopefully never used, this piggybacks on the normal next() wrapping
> behavior if Character.MAX_VALUE is reached. And also, like next(), applies
> the the last character in a longer String as per last test above.
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