View Source Credo.Check.Warning.UnusedKeywordOperation (Credo v1.7.2-rc.4)
This check has a base priority of high
and works with any version of Elixir.
Explanation
The result of a call to the Keyword module's functions has to be used.
While this is correct ...
def clean_and_verify_options!(keywords) do
keywords = Keyword.delete(keywords, :debug)
if Enum.length(keywords) == 0, do: raise "OMG!!!1"
keywords
end
... we forgot to save the result in this example:
def clean_and_verify_options!(keywords) do
Keyword.delete(keywords, :debug)
if Enum.length(keywords) == 0, do: raise "OMG!!!1"
keywords
end
Keyword operations never work on the variable you pass in, but return a new variable which has to be used somehow.
Check-Specific Parameters
There are no specific parameters for this check.
General Parameters
Like with all checks, general params can be applied.
Parameters can be configured via the .credo.exs
config file.