Examples with DoubleUnaryOperator com.annimon.stream.function.DoubleUnaryOperator used on opensource projects

Example 1 with DoubleUnaryOperator

use of com.annimon.stream.function.DoubleUnaryOperator in project Lightweight-Stream-API by aNNiMON.

the class IterateTest method testStreamIterateWithPredicate.

@Test
@SuppressWarnings("unchecked")
public void testStreamIterateWithPredicate() {
    DoublePredicate condition = new DoublePredicate() {

        @Override
        public boolean test(double value) {
            return value < 0.2;
        }
    };
    DoubleUnaryOperator increment = new DoubleUnaryOperator() {

        @Override
        public double applyAsDouble(double t) {
            return t + 0.05;
        }
    };
    DoubleStream.iterate(0, condition, increment).custom(assertElements(arrayContaining(closeTo(0.00, 0.00001), closeTo(0.05, 0.00001), closeTo(0.10, 0.00001), closeTo(0.15, 0.00001))));
}

Example 2 with DoubleUnaryOperator

use of com.annimon.stream.function.DoubleUnaryOperator in project Lightweight-Stream-API by aNNiMON.

the class OptionalDoubleTest method testMap.

@Test
public void testMap() {
    final DoubleUnaryOperator negatorFunction = new DoubleUnaryOperator() {

        @Override
        public double applyAsDouble(double operand) {
            return -operand;
        }
    };
    OptionalDouble result;
    result = OptionalDouble.empty().map(negatorFunction);
    assertThat(result, isEmpty());
    result = OptionalDouble.of(10.123).map(negatorFunction);
    assertThat(result, hasValueThat(closeTo(-10.123, 0.0001)));
}

Example 3 with DoubleUnaryOperator

use of com.annimon.stream.function.DoubleUnaryOperator in project Lightweight-Stream-API by aNNiMON.

the class IterateTest method testStreamIterate.

@Test
@SuppressWarnings("unchecked")
public void testStreamIterate() {
    DoubleUnaryOperator operator = new DoubleUnaryOperator() {

        @Override
        public double applyAsDouble(double operand) {
            return operand + 0.01;
        }
    };
    DoubleStream.iterate(0.0, operator).limit(3).custom(assertElements(arrayContaining(closeTo(0.00, 0.00001), closeTo(0.01, 0.00001), closeTo(0.02, 0.00001))));
}

Example 4 with DoubleUnaryOperator

use of com.annimon.stream.function.DoubleUnaryOperator in project Lightweight-Stream-API by aNNiMON.

the class MapTest method testMap.

@Test
public void testMap() {
    DoubleUnaryOperator negator = new DoubleUnaryOperator() {

        @Override
        public double applyAsDouble(double operand) {
            return -operand;
        }
    };
    DoubleStream.of(0.012, 3.039, 100d).map(negator).custom(assertElements(arrayContaining(-0.012, -3.039, -100d)));
    DoubleStream.empty().map(negator).custom(assertIsEmpty());
}