16 lines
441 B
Java
16 lines
441 B
Java
import java.util.function.DoubleUnaryOperator;
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public interface AccumulatorFactory {
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public static DoubleUnaryOperator accumulator(double element) {
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double[] sum = { element };
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return value -> sum[0] += value;
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}
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public static void main(String... arguments) {
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DoubleUnaryOperator x = accumulator(1.0);
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x.applyAsDouble(5.0);
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System.out.println(accumulator(3.0));
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System.out.println(x.applyAsDouble(2.3));
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}
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}
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