Example usage for java.util.function DoubleUnaryOperator applyAsDouble

Introduction

In this page you can find the example usage for java.util.function DoubleUnaryOperator applyAsDouble.

Prototype

double applyAsDouble(double operand);

Source Link

Document

Applies this operator to the given operand.

Usage

From source file:at.gridtec.lambda4j.predicate.tri.obj.BiObjDoublePredicate.java

/**
 * Returns a composed {@link TriDoublePredicate} that first applies the {@code before} functions to its input, and
 * then applies this predicate to the result. If evaluation of either operation throws an exception, it is relayed
 * to the caller of the composed operation. This method is just convenience, to provide the ability to execute an
 * operation which accepts {@code double} input, before this primitive predicate is executed.
 *
 * @param before1 The first function to apply before this predicate is applied
 * @param before2 The second function to apply before this predicate is applied
 * @param before3 The third operator to apply before this predicate is applied
 * @return A composed {@code TriDoublePredicate} that first applies the {@code before} functions to its input, and
 * then applies this predicate to the result.
 * @throws NullPointerException If given argument is {@code null}
 * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code
 * double}./*w w w.j  a v a2s  .  c  o  m*/
 */
@Nonnull
default TriDoublePredicate composeFromDouble(@Nonnull final DoubleFunction<? extends T> before1,
        @Nonnull final DoubleFunction<? extends U> before2, @Nonnull final DoubleUnaryOperator before3) {
    Objects.requireNonNull(before1);
    Objects.requireNonNull(before2);
    Objects.requireNonNull(before3);
    return (value1, value2, value3) -> test(before1.apply(value1), before2.apply(value2),
            before3.applyAsDouble(value3));
}

From source file:com.simiacryptus.mindseye.lang.Tensor.java

/**
 * Map parallel tensor.//www.  j a  v a2  s . co m
 *
 * @param f the f
 * @return the tensor
 */
@Nullable
public Tensor mapParallel(@Nonnull final DoubleUnaryOperator f) {
    @Nullable
    final double[] data = getData();
    return new Tensor(Tensor.getDoubles(IntStream.range(0, length()).mapToDouble(i -> f.applyAsDouble(data[i])),
            length()), dimensions);
}

From source file:com.simiacryptus.mindseye.lang.Tensor.java

/**
 * Map tensor./* ww w.jav  a2 s .  com*/
 *
 * @param f the f
 * @return the tensor
 */
@Nullable
public Tensor map(@Nonnull final DoubleUnaryOperator f) {
    @Nullable
    final double[] data = getData();
    Tensor tensor = new Tensor(dimensions);
    @Nonnull
    final double[] cpy = tensor.getData();
    IntStream.range(0, data.length).parallel().forEach(i -> cpy[i] = f.applyAsDouble(data[i]));
    return tensor;
}

From source file:com.simiacryptus.mindseye.lang.Tensor.java

/**
 * Map and free tensor./*from  w w  w.  ja v  a  2 s .co  m*/
 *
 * @param f the f
 * @return the tensor
 */
@Nullable
public Tensor mapAndFree(@Nonnull final DoubleUnaryOperator f) {
    @Nullable
    final double[] data = getData();
    @Nonnull
    final double[] cpy = new double[data.length];
    for (int i = 0; i < data.length; i++) {
        final double x = data[i];
        // assert Double.isFinite(x);
        final double v = f.applyAsDouble(x);
        // assert Double.isFinite(v);
        cpy[i] = v;
    }
    Tensor tensor = new Tensor(cpy, dimensions);
    this.freeRef();
    return tensor;
}

From source file:org.briljantframework.array.AbstractDoubleArray.java

@Override
public void assign(DoubleArray array, DoubleUnaryOperator operator) {
    array = ShapeUtils.broadcastIfSensible(this, array);
    Check.size(this, array);
    for (int i = 0; i < size(); i++) {
        set(i, operator.applyAsDouble(array.get(i)));
    }/*from ww w . j  ava  2s .  c  o  m*/
}

From source file:org.briljantframework.array.AbstractDoubleArray.java

@Override
public DoubleArray map(DoubleUnaryOperator operator) {
    DoubleArray mat = newEmptyArray(getShape());
    for (int i = 0; i < size(); i++) {
        mat.set(i, operator.applyAsDouble(get(i)));
    }// ww w. j a v  a2  s  .  c o m
    return mat;
}

From source file:org.briljantframework.array.AbstractDoubleArray.java

@Override
public void apply(DoubleUnaryOperator operator) {
    for (int i = 0; i < size(); i++) {
        set(i, operator.applyAsDouble(get(i)));
    }/*  w  w w .  j a va 2  s.c o m*/
}

From source file:org.lenskit.util.math.Vectors.java

/**
 * Transform the values of a vector.//from   w w w . j  av a  2  s  . c  o m
 *
 * @param input The vector to transform.
 * @param function The transformation to apply.
 * @return A new vector that is the result of applying `function` to each value in `input`.
 */
public static Long2DoubleMap transform(Long2DoubleMap input, DoubleUnaryOperator function) {
    // FIXME Improve performance when input is also sorted
    SortedKeyIndex idx = SortedKeyIndex.fromCollection(input.keySet());
    int n = idx.size();
    double[] values = new double[n];
    for (int i = 0; i < n; i++) {
        values[i] = function.applyAsDouble(input.get(idx.getKey(i)));
    }

    return Long2DoubleSortedArrayMap.wrap(idx, values);
}