View Source Credo.Check.Warning.UnusedTupleOperation (Credo v1.7.0)

This check has a base priority of high and works with any version of Elixir.

explanation
Explanation

The result of a call to the Tuple module's functions has to be used.

While this is correct ...

def remove_magic_item!(tuple) do
  tuple = Tuple.delete_at(tuple, 0)

  if Enum.length(tuple) == 0, do: raise "OMG!!!1"

  tuple
end

... we forgot to save the result in this example:

def remove_magic_item!(tuple) do
  Tuple.delete_at(tuple, 0)

  if Enum.length(tuple) == 0, do: raise "OMG!!!1"

  tuple
end

Tuple operations never work on the variable you pass in, but return a new variable which has to be used somehow.

There are no specific parameters for this check.

Like with all checks, general params can be applied.

Parameters can be configured via the .credo.exs config file.