Hi, Thomas Chust wrote: > Hello, > > looking into Perl 6 syntax I noticed that there are meta- and > hyperoperators to perform among others the classical functional map > and fold operations. However, if I understood this correctly, you can > only use these constructs to lift scalar *operators* to the domain of > arrays.
For operators there are meta-operators. For functions there are functions: reduce &reduce_function, map &map_function @values; Note that the biggest advantage of things like [**] is that they automatically obey the associativity rules for the operator infix:<**>. Since subs have no associativity, I don't see a big advantage in having a reduce-for-functions or map-for-functions operator. > Therefore I think that it would be a nice addition for Perl 6 if the > X...X, <<...>> and similar operators could be applied to anonymous > subroutines in addition to other operators. If such a syntactic change > wasn't possible it would probably be worthwhile to offer methods like > map and fold on array instances that take subroutine references as an > alternative. There are already. You could write my example above also as @values.map(&map_function).reduce(&reduce_function) Cheers, Moritz -- Moritz Lenz http://perlgeek.de/ | http://perl-6.de/ | http://sudokugarden.de/
