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close #4204
This commit is contained in:
acbin
2023-06-09 18:52:05 +08:00
committed by GitHub
parent ad03086f54
commit 00282efd8b
521 changed files with 5233 additions and 7309 deletions
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54
src/main/java/com/thealgorithms/maths/FibonacciJavaStreams.java
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@ -25,31 +25,24 @@ public class FibonacciJavaStreams {
return Optional.of(BigDecimal.ONE);
}
final List<BigDecimal> results = Stream
.iterate(
index,
x -> x.compareTo(BigDecimal.ZERO) > 0,
x -> x.subtract(BigDecimal.ONE)
)
.reduce(
List.of(),
(list, current) ->
list.isEmpty() || list.size() < 2
? List.of(BigDecimal.ZERO, BigDecimal.ONE)
: List.of(list.get(1), list.get(0).add(list.get(1))),
(list1, list2) -> list1
);
final List<BigDecimal> results
= Stream
.iterate(
index, x -> x.compareTo(BigDecimal.ZERO) > 0, x -> x.subtract(BigDecimal.ONE))
.reduce(List.of(),
(list, current)
-> list.isEmpty() || list.size() < 2
? List.of(BigDecimal.ZERO, BigDecimal.ONE)
: List.of(list.get(1), list.get(0).add(list.get(1))),
(list1, list2) -> list1);
return results.isEmpty()
? Optional.empty()
: Optional.of(results.get(results.size() - 1));
return results.isEmpty() ? Optional.empty() : Optional.of(results.get(results.size() - 1));
}
public static void assertThat(final Object actual, final Object expected) {
if (!Objects.equals(actual, expected)) {
throw new AssertionError(
String.format("expected=%s but was actual=%s", expected, actual)
);
String.format("expected=%s but was actual=%s", expected, actual));
}
}
@ -91,39 +84,28 @@ public class FibonacciJavaStreams {
{
final Optional<BigDecimal> result = calculate(new BigDecimal(30));
assertThat(result.isPresent(), true);
result.ifPresent(value -> assertThat(value, new BigDecimal(832040))
);
result.ifPresent(value -> assertThat(value, new BigDecimal(832040)));
}
{
final Optional<BigDecimal> result = calculate(new BigDecimal(40));
assertThat(result.isPresent(), true);
result.ifPresent(value ->
assertThat(value, new BigDecimal(102334155))
);
result.ifPresent(value -> assertThat(value, new BigDecimal(102334155)));
}
{
final Optional<BigDecimal> result = calculate(new BigDecimal(50));
assertThat(result.isPresent(), true);
result.ifPresent(value ->
assertThat(value, new BigDecimal(12586269025L))
);
result.ifPresent(value -> assertThat(value, new BigDecimal(12586269025L)));
}
{
final Optional<BigDecimal> result = calculate(new BigDecimal(100));
assertThat(result.isPresent(), true);
result.ifPresent(value ->
assertThat(value, new BigDecimal("354224848179261915075"))
);
result.ifPresent(value -> assertThat(value, new BigDecimal("354224848179261915075")));
}
{
final Optional<BigDecimal> result = calculate(new BigDecimal(200));
assertThat(result.isPresent(), true);
result.ifPresent(value ->
assertThat(
value,
new BigDecimal("280571172992510140037611932413038677189525")
)
);
result.ifPresent(value
-> assertThat(value, new BigDecimal("280571172992510140037611932413038677189525")));
}
}
}