In the code as shown, "map" just melds in the array reference construction. Perhaps that is what you prefer.
I personally would either make a temporary variable to hold the map result; or rearrange the code to highlight map function. On the second note ...
'troll' => [ 'troll',
map( "$_ troll",
qw(desert freshwater giant ice saltwater snow spectr
+al),
'two-headed'
),
'trobold',
@$tralg,
@$throglin
]
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