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Posted to notifications@groovy.apache.org by "Paul King (Jira)" <ji...@apache.org> on 2020/12/05 01:59:00 UTC
[jira] [Comment Edited] (GROOVY-9848) Allow membership operator to
work on maps
[ https://issues.apache.org/jira/browse/GROOVY-9848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17244376#comment-17244376 ]
Paul King edited comment on GROOVY-9848 at 12/5/20, 1:58 AM:
-------------------------------------------------------------
The membership operator "works" on maps but possibly not in the expected way. The `in` operator maps to `isCase` which is geared up for somewhat intuitive operation as part of a switch statement but effectively being member of keyset when used directly:
{code}
def map = [a: 1, b: 2]
assert 'a' in map // key
assert 2 !in map // value
assert [a: 1].iterator()[0] !in map // entry
{code}
It doesn't mean it couldn't change, but it might not be easy.
was (Author: paulk):
The membership operator "works" on maps but possibly not in the expected way. The `in` operator maps to `isCase` which is geared up for somewhat intuitive operation as part of a switch statement but effectively being member of keyset when used directly:
{code}
def map = [a: 1, b: 2]
assert 'a' in map // key
assert 2 !in map // value
assert [a: 1].iterator()[0] !in map // entry
{code}
> Allow membership operator to work on maps
> -----------------------------------------
>
> Key: GROOVY-9848
> URL: https://issues.apache.org/jira/browse/GROOVY-9848
> Project: Groovy
> Issue Type: Improvement
> Reporter: Keegan Witt
> Priority: Major
>
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