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(def n (count mymap))auto n = mymap.size();n = mymap.Count;const n = mymap.length;length is one of the property of D builtin map type.
var n = mymap.length;def n = mymap.size()getMapSize :: Map.Map k v -> Int
getMapSize m = Map.size mThe eta-reduced version would simply be: getMapSize = Map.size
const n = mymap.sizemymap has type Map
int n = mymap.size();local n=0
for _ in pairs(mymap) do n=n+1 endThe pairs() function is the only reliable way to get the length of a table in Lua, since #mymap only works for index based arrays.
n = len(mymap)n = mymap.sizeval n = mymap.sizen := mymap size.