https://dokuwiki.grogra.de/ 2026-05-16T10:32:42+00:00 https://dokuwiki.grogra.de/ https://dokuwiki.grogra.de/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2025-09-04T09:24:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://dokuwiki.grogra.de/doku.php?id=01_user_documentation:07_rgg_xl:02_xl:08_object:05_aggregate:01_containment_operator&rev=1756977884&do=diff Containment Operator The containment operator a in b aggregates the logical or of a == b. Typical examples are a in (1 : 3) which has true as result if and only if a equals 1, 2 or 3, or a in n.children() which tests whether a node a is contained in the sequence of values returned by the generator method n.children(). The containment operator terminates the evaluation of the generator expression once it knows the final result, i. e., if text/html 2025-09-04T09:24:02+00:00 Anonymous (anonymous@undisclosed.example.com) https://dokuwiki.grogra.de/doku.php?id=01_user_documentation:07_rgg_xl:02_xl:08_object:05_aggregate:02_aggregate_methods&rev=1756977842&do=diff Aggregate Methods Like filter methods, aggregate methods receive a sequence of values as input. However, their result is a single value. When used in the code, the first two argument of the method are “combined”. The first argument given has to be an Aggregate of the Type of the second argument