Property-Based Testing with PropEr, Erlang, and Elixir: (suppress the warning by assigning the expression to the _ variable (page 89)

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While running code example one of expression’s result is unused. It is easy to fix. Just use “_” variable. That structure inform the compiler that it is Ok ignoring expression’s result.
For example:

 _ = [maps:get(K, M)  || {K, _V} <- KV],