in archived/ModernizeYourDatabases2019/ModernizeSQL2019/Module 5 Activity - Modern Development Platform/java/Ngram.java [86:90]
private static List<String> ngrams(int n, String text) {
return IntStream.range(0, text.length() - n + 1)
.mapToObj(i -> text.substring(i, i + n))
.collect(Collectors.toList());
}