public static HashMap<Long, Long> factorization(long num) {
if (num == 1) {
return HashMap.empty();
} else {
return primeFactors(num)
.map(p -> HashMap.of(Tuple.of(p, 1L)).merge(factorization(num / p), (a, b) -> a + b))
.orElseGet(HashMap::empty);
}
}
@Test
public void shouldConvertToMap() {
final Value<Integer> value = of(1, 2, 3);
final Map<Integer, Integer> map = value.toMap(v -> Tuple.of(v, v));
if (value.isSingleValued()) {
assertThat(map).isEqualTo(HashMap.of(1, 1));
} else {
assertThat(map).isEqualTo(HashMap.empty().put(1, 1).put(2, 2).put(3, 3));
}
}
@Override
public <C> Map<C, HashMap<K, V>> groupBy(Function<? super Tuple2<K, V>, ? extends C> classifier) {
Objects.requireNonNull(classifier, "classifier is null");
return foldLeft(
HashMap.empty(),
(map, entry) -> {
final C key = classifier.apply(entry);
final HashMap<K, V> values =
map.get(key).map(entries -> entries.put(entry)).orElse(HashMap.of(entry));
return map.put(key, values);
});
}
public Map<String, String> getResponseHeaders(Request request) {
String fallbackAllowOriginValue = allowedOrigins.mkString(",");
return HashMap.of(
ACCESS_CONTROL_ALLOW_ORIGIN_HEADER,
isAllowed(request)
? request.getHeader(ORIGIN_HEADER).getOrElse(fallbackAllowOriginValue)
: fallbackAllowOriginValue,
ACCESS_CONTROL_ALLOW_CREDENTIALS_HEADER, "true",
ACCESS_CONTROL_EXPOSE_HEADERS_HEADER, "*",
ACCESS_CONTROL_ALLOW_HEADERS_HEADER, "*",
ACCESS_CONTROL_MAX_AGE_HEADER, "1800",
ACCESS_CONTROL_ALLOW_METHODS_HEADER, "*");
}