Function keyNormalizer

pkg/cache/cache.go:247–257

keyNormalizer returns a function that applies the configured normalization rules to a question before it is used as a cache key. Trim runs before lowercase: trim only removes leading/trailing whitespace and is unaffected by case, so the order is irrelevant for correctness, but trim-first keeps the l

(caseSensitive, trimSpaces bool)

// correctness, but trim-first keeps the lowercased map keys tighter on
// inputs like "  HELLO\n".
func keyNormalizer(caseSensitive, trimSpaces bool) func(string) string {
	return func(s string) string {
		if trimSpaces {
			s = strings.TrimSpace(s)
		}
		if !caseSensitive {
			s = strings.ToLower(s)
		}
		return s
	}
}

// loadFromFile decodes path into entries. A missing file is not an error
// and leaves entries empty.