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-rw-r--r--raku/leap/Leap.rakumod5
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diff --git a/raku/leap/Leap.rakumod b/raku/leap/Leap.rakumod
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+unit module Leap;
+
+sub is-leap-year ($year) is export {
+    $year %% 4 && ($year !%% 100 || $year %% 400);
+}