View Source Antikythera.MapUtil (antikythera v0.5.1)

Utility functions to work with maps.

Summary

Functions

difference(m1, m2)
map_values(m, f)
update_existing(map, key, fun)

Update the key in map with the given function, only when the key exists. Unlike Map.update!/3, it returns :error if the key does not exist.

Functions

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difference(m1, m2)

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@spec difference(%{required(k) => v}, %{required(k) => v}) ::
  {%{required(k) => v}, %{required(k) => {v, v}}, %{required(k) => v}}
when k: any(), v: any()
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map_values(m, f)

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@spec map_values(%{required(k) => v1}, ({k, v1} -> v2)) :: %{required(k) => v2}
when k: any(), v1: any(), v2: any()
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update_existing(map, key, fun)

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@spec update_existing(map(), any(), (any() -> any())) :: {:ok, map()} | :error

Update the key in map with the given function, only when the key exists. Unlike Map.update!/3, it returns :error if the key does not exist.