5.5 Map Declaration

Maps are initialized similarly to arrays, but include both keys and their corresponding values. ["example" => 1, "data" => 2] initializes a map (Map<String, Int> specifically) where the key "example" stores the value 1 and "data" stores the value 2.

since Haxe 4.0.0

Where a map type is expected (based on top-down inference), [] refers to an empty map.