A.OrdMap.update

You're seeing just the function update, go back to A.OrdMap module for more information.
Link to this function

update(ord_map, key, default, fun)

View Source

Specs

update(t(k, v), k, v, (k -> v)) :: t(k, v) when k: key(), v: value()

Puts a value under key only if the key already exists in ord_map.

Examples

iex> ord_map = A.OrdMap.new(a: "Ant", b: "Bat", c: "Cat")
iex> A.OrdMap.update(ord_map, :b, "N/A", &String.upcase/1)
ord(%{a: "Ant", b: "BAT", c: "Cat"})
iex> A.OrdMap.update(ord_map, :z, "N/A", &String.upcase/1)
ord(%{a: "Ant", b: "Bat", c: "Cat", z: "N/A"})