nsAString str = NS_LITERAL_STRING("Hello "); str.AppendASCII("World");
nsAString str; str.AppendASCII("Some string data", 5);This code creates an empty `nsAString` object `str` and then appends the first 5 characters of the string `"Some string data"` to it using `AppendASCII`. The resulting `str` would be `"Some "`. In both examples, the `nsAString` object is modified by adding ASCII characters to it using `AppendASCII`. Therefore, `nsAString AppendASCII` is a function in the Mozilla Network Security Services (NSS) package library.