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It is not recommended to use len for empty string test. A string can be tested for its emptiness either by treating it as a slice and calculating the length of the slice, or by treating it as a string and directly comparing the value. While both produce identical code when compiled, it makes more sense to treat a string as itself, than a slice, for the sake of comparison of values. Examples Bad practice len(s) == 0 Recommended s == "" The recommended practice is considered more idiomatic in Go. Co-authored-by: Sandeep Singh <sandeep@projectdiscovery.io>