Idiomatic check for empty string

Both versions below achieve the same thing but version 1 is idiomatic in Go for the following reasons:

1. It expresses intent, not mechanics — it’s easy to understand that you’re checking for empty value
2. It is aligned wiht Go’s zero-value philosophy
3. You know you’re dealing with string by looking at its comparison

// version 1
if str == "" {
	//...
}

// version 2
if len(str) == 0 {
	// ...
}