Oh, one more thing! Apply the “let it fail” philosophy wherever you can!
For example, instead of:
case foo(bar) do
{:ok, bar} -> {:ok, bar.foo}
resp -> resp
end
Do no match all clause, and let it fail for unknown scenarios:
case foo(bar) do
{:ok, bar} -> {:ok, bar.foo}
{:error, resp} -> {:error, resp}
end
Again, silly example, but what I mean is: exceptions like CaseClauseError are better errors to get than unexpected values escaping out of your own code, believe me.
