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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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31
Task/Accumulator-factory/Java/accumulator-factory-2.java
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@ -1,19 +1,16 @@
import com.google.common.base.Function;
public class Accumulator {
private double sum;
public Accumulator(double sum0) {
sum = sum0;
}
public double call(double n) {
return sum += n;
}
public class AccumulatorFactory {
private static Function<Double, Double> accumulator(final Double elem) {
return new Function<Double, Double>() {
Double sum = elem;
@Override public Double apply(Double val) {
return sum += val;
}
};
}
public static void main(String[] args) {
Function<Double, Double> x = accumulator(1d);
x.apply(5d);
System.out.println(accumulator(3d));
System.out.println(x.apply(2.3));
}
public static void main(String[] args) {
Accumulator x = new Accumulator(1);
x.call(5);
System.out.println(new Accumulator(3));
System.out.println(x.call(2.3));
}
}

33
Task/Accumulator-factory/Java/accumulator-factory-3.java
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@ -1,15 +1,24 @@
import java.util.function.DoubleUnaryOperator;
public class AccumulatorFactory {
public interface AccumulatorFactory {
public static DoubleUnaryOperator accumulator(double element) {
double[] sum = new double[] { element };
return value -> sum[0] += value;
}
public interface Accumulator {
double add(double x);
}
public static void main(String... arguments) {
DoubleUnaryOperator x = accumulator(1d);
x.applyAsDouble(5d);
System.out.println(accumulator(3d));
System.out.println(x.applyAsDouble(2.3));
}
private static Accumulator accumulator(final double initial) {
return new Accumulator() {
private double sum = initial;
@Override
public double add(double x) {
return sum += x;
}
};
}
public static void main(String[] args) {
Accumulator x = accumulator(1.0);
x.add(5.0);
System.out.println(accumulator(3.0));
System.out.println(x.add(2.3));
}
}

41
Task/Accumulator-factory/Java/accumulator-factory-4.java
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@ -1,30 +1,15 @@
public class Accumulator {
private Long sumA; // non-null if we're working in the integer domain
private double sumB;
public Accumulator(Number sum0) {
if (sum0 instanceof Double) {
sumB = sum0.doubleValue();
} else {
sumA = sum0.longValue();
}
}
public Number call(Number n) {
if (sumA != null) {
if (n instanceof Double) {
sumB = n.doubleValue() + sumA;
sumA = null;
return sumB;
}
return sumA += n.longValue();
}
return sumB += n.doubleValue();
}
import java.util.function.DoubleUnaryOperator;
public static void main(String[] args) {
Accumulator x = new Accumulator(1);
x.call(5);
Accumulator y = new Accumulator(3);
System.out.println(y+" has value "+y.call(0));
System.out.println(x.call(2.3));
}
public interface AccumulatorFactory {
public static DoubleUnaryOperator accumulator(double element) {
double[] sum = { element };
return value -> sum[0] += value;
}
public static void main(String... arguments) {
DoubleUnaryOperator x = accumulator(1.0);
x.applyAsDouble(5.0);
System.out.println(accumulator(3.0));
System.out.println(x.applyAsDouble(2.3));
}
}

30
Task/Accumulator-factory/Java/accumulator-factory-5.java Normal file
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@ -0,0 +1,30 @@
public class Accumulator {
private Long sumA; // non-null if we're working in the integer domain
private double sumB;
public Accumulator(Number sum0) {
if (sum0 instanceof Double) {
sumB = sum0.doubleValue();
} else {
sumA = sum0.longValue();
}
}
public Number call(Number n) {
if (sumA != null) {
if (n instanceof Double) {
sumB = n.doubleValue() + sumA;
sumA = null;
return sumB;
}
return sumA += n.longValue();
}
return sumB += n.doubleValue();
}
public static void main(String[] args) {
Accumulator x = new Accumulator(1);
x.call(5);
Accumulator y = new Accumulator(3);
System.out.println(y+" has value "+y.call(0));
System.out.println(x.call(2.3));
}
}