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> my $fmt = { sprintf "%04d-%02d", .year, .month }; -> ;; $_? is raw { #`(Block|173600432) ... } > say Date.new(2019, 1, 1, formatter => $fmt); 2019-01
> say Date.new(2019, 1, "1", formatter => { sprintf "%04d-%02d", .year +, .month }) 2019-01