lib/dry/events/constants.rb in dry-events-1.0.0 vs lib/dry/events/constants.rb in dry-events-1.0.1

@@ -4,8 +4,10 @@
 
 module Dry
   module Events
     include Dry::Core::Constants
 
-    LISTENERS_HASH = Concurrent::Map.new { |h, k| h[k] = [] }
+    LISTENERS_HASH = Concurrent::Map.new do |h, k|
+      h.compute_if_absent(k) { [] }
+    end
   end
 end