Credo v1.4.0 Credo.Check.Warning.UnusedRegexOperation View Source
This check has a base priority of high and works with any version of Elixir.
Explanation
The result of a call to the Regex module's functions has to be used.
While this is correct ...
def extract_username_and_salute(regex, string) do
[string] = Regex.run(regex, string)
"Hi #{string}"
end... we forgot to save the downcased username in this example:
def extract_username_and_salute(regex, string) do
Regex.run(regex, string)
"Hi #{string}"
endRegex operations never work on the variable you pass in, but return a new variable which has to be used somehow.
Configuration parameters
There are no parameters for this check.