Examples with DoubleToLongFunction java.util.function.DoubleToLongFunction used on opensource projects

Example 1 with DoubleToLongFunction

use of java.util.function.DoubleToLongFunction in project streamex by amaembo.

the class DoubleStreamExTest method testMinMax.

@Test
public void testMinMax() {
    checkEmpty(s -> s.maxBy(Double::valueOf), s -> s.maxByInt(x -> (int) x), s -> s.maxByLong(x -> (long) x), s -> s.maxByDouble(x -> x), s -> s.minBy(Double::valueOf), s -> s.minByInt(x -> (int) x), s -> s.minByLong(x -> (long) x), s -> s.minByDouble(x -> x));
    assertEquals(9, IntStreamEx.range(5, 12).asDoubleStream().max(Comparator.comparing(String::valueOf)).getAsDouble(), 0.0);
    assertEquals(10, IntStreamEx.range(5, 12).asDoubleStream().min(Comparator.comparing(String::valueOf)).getAsDouble(), 0.0);
    assertEquals(9, IntStreamEx.range(5, 12).asDoubleStream().maxBy(String::valueOf).getAsDouble(), 0.0);
    assertEquals(10, IntStreamEx.range(5, 12).asDoubleStream().minBy(String::valueOf).getAsDouble(), 0.0);
    assertEquals(5, IntStreamEx.range(5, 12).asDoubleStream().maxByDouble(x -> 1.0 / x).getAsDouble(), 0.0);
    assertEquals(11, IntStreamEx.range(5, 12).asDoubleStream().minByDouble(x -> 1.0 / x).getAsDouble(), 0.0);
    assertEquals(29.0, DoubleStreamEx.of(15, 8, 31, 47, 19, 29).maxByInt(x -> (int) (x % 10 * 10 + x / 10)).getAsDouble(), 0.0);
    assertEquals(31.0, DoubleStreamEx.of(15, 8, 31, 47, 19, 29).minByInt(x -> (int) (x % 10 * 10 + x / 10)).getAsDouble(), 0.0);
    assertEquals(29.0, DoubleStreamEx.of(15, 8, 31, 47, 19, 29).maxByLong(x -> (long) (x % 10 * 10 + x / 10)).getAsDouble(), 0.0);
    assertEquals(31.0, DoubleStreamEx.of(15, 8, 31, 47, 19, 29).minByLong(x -> (long) (x % 10 * 10 + x / 10)).getAsDouble(), 0.0);
    Supplier<DoubleStreamEx> s = () -> DoubleStreamEx.of(1, 50, 120, 35, 130, 12, 0);
    DoubleToIntFunction intKey = x -> String.valueOf(x).length();
    DoubleToLongFunction longKey = x -> String.valueOf(x).length();
    DoubleUnaryOperator doubleKey = x -> String.valueOf(x).length();
    DoubleFunction<Integer> objKey = x -> String.valueOf(x).length();
    List<Function<DoubleStreamEx, OptionalDouble>> minFns = Arrays.asList(is -> is.minByInt(intKey), is -> is.minByLong(longKey), is -> is.minByDouble(doubleKey), is -> is.minBy(objKey));
    List<Function<DoubleStreamEx, OptionalDouble>> maxFns = Arrays.asList(is -> is.maxByInt(intKey), is -> is.maxByLong(longKey), is -> is.maxByDouble(doubleKey), is -> is.maxBy(objKey));
    minFns.forEach(fn -> assertEquals(1, fn.apply(s.get()).getAsDouble(), 0.0));
    minFns.forEach(fn -> assertEquals(1, fn.apply(s.get().parallel()).getAsDouble(), 0.0));
    maxFns.forEach(fn -> assertEquals(120, fn.apply(s.get()).getAsDouble(), 0.0));
    maxFns.forEach(fn -> assertEquals(120, fn.apply(s.get().parallel()).getAsDouble(), 0.0));
}