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Version: 1.5.0

Adding

Adding a binding to a big map is done by calling the function Big_Map.add. If the key was already present in the given big map, the corresponding value is updated.

const my_map: big_map<int,string> =
Big_map.literal(list([[1,"one"],[2,"two"]]));
const new_map = Big_map.add(3, "three", my_map);
const contains_3 = Big_map.mem(3, new_map); // == true