A.OrdMap.get_lazy
You're seeing just the function
get_lazy
, go back to A.OrdMap module for more information.
Specs
Gets the value for a specific key
in ord_map
.
If key
is present in ord_map
then its value value
is
returned. Otherwise, fun
is evaluated and its result is returned.
This is useful if the default value is very expensive to calculate or generally difficult to setup and teardown again.
Examples
iex> ord_map = A.OrdMap.new(a: "Ant", b: "Bat", c: "Cat")
iex> expensive_fun = fn -> "Zebra" end
iex> A.OrdMap.get_lazy(ord_map, :a, expensive_fun)
"Ant"
iex> A.OrdMap.get_lazy(ord_map, :z, expensive_fun)
"Zebra"