本文整理汇总了Java中java.util.Arrays.parallelPrefix方法的典型用法代码示例。如果您正苦于以下问题：Java Arrays.parallelPrefix方法的具体用法？Java Arrays.parallelPrefix怎么用？Java Arrays.parallelPrefix使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.util.Arrays的用法示例。
在下文中一共展示了Arrays.parallelPrefix方法的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: simpleMovingAverage
import java.util.Arrays; //导入方法依赖的package包/类
public static double[] simpleMovingAverage(double[] values, int n) {
double[] sums = Arrays.copyOf(values, values.length); // <1>
Arrays.parallelPrefix(sums, Double::sum); // <2>
int start = n - 1;
return IntStream.range(start, sums.length) // <3>
.mapToDouble(i -> {
double prefix = i == start ? 0 : sums[i - n];
return (sums[i] - prefix) / n; // <4>
})
.toArray(); // <5>
}
开发者ID:jinyi233，项目名称:https-github.com-RichardWarburton-java-8-Lambdas-exercises，代码行数:12，代码来源:ArrayExamples.java
示例2: testParallelPrefixForInt
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="intSet")
public void testParallelPrefixForInt(int[] data, int fromIndex, int toIndex, IntBinaryOperator op) {
int[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsInt(sequentialResult[index - 1], sequentialResult[index]);
}
int[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertEquals(parallelResult, sequentialResult);
int[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例3: testParallelPrefixForLong
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="longSet")
public void testParallelPrefixForLong(long[] data, int fromIndex, int toIndex, LongBinaryOperator op) {
long[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsLong(sequentialResult[index - 1], sequentialResult[index]);
}
long[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertEquals(parallelResult, sequentialResult);
long[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例4: testParallelPrefixForDouble
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="doubleSet")
public void testParallelPrefixForDouble(double[] data, int fromIndex, int toIndex, DoubleBinaryOperator op) {
double[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsDouble(sequentialResult[index - 1], sequentialResult[index]);
}
double[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertEquals(parallelResult, sequentialResult);
double[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例5: testParallelPrefixForStringr
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="stringSet")
public void testParallelPrefixForStringr(String[] data , int fromIndex, int toIndex, BinaryOperator<String> op) {
String[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.apply(sequentialResult[index - 1], sequentialResult[index]);
}
String[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertEquals(parallelResult, sequentialResult);
String[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例6: testParallelPrefixForInt
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="intSet")
public void testParallelPrefixForInt(int[] data, int fromIndex, int toIndex, IntBinaryOperator op) {
int[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsInt(sequentialResult[index - 1], sequentialResult[index]);
}
int[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertArraysEqual(parallelResult, sequentialResult);
int[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例7: testParallelPrefixForLong
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="longSet")
public void testParallelPrefixForLong(long[] data, int fromIndex, int toIndex, LongBinaryOperator op) {
long[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsLong(sequentialResult[index - 1], sequentialResult[index]);
}
long[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertArraysEqual(parallelResult, sequentialResult);
long[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例8: testParallelPrefixForDouble
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="doubleSet")
public void testParallelPrefixForDouble(double[] data, int fromIndex, int toIndex, DoubleBinaryOperator op) {
double[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.applyAsDouble(sequentialResult[index - 1], sequentialResult[index]);
}
double[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertArraysEqual(parallelResult, sequentialResult);
double[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}
示例9: testParallelPrefixForStringr
import java.util.Arrays; //导入方法依赖的package包/类
@Test(dataProvider="stringSet")
public void testParallelPrefixForStringr(String[] data , int fromIndex, int toIndex, BinaryOperator<String> op) {
String[] sequentialResult = data.clone();
for (int index = fromIndex + 1; index < toIndex; index++) {
sequentialResult[index ] = op.apply(sequentialResult[index - 1], sequentialResult[index]);
}
String[] parallelResult = data.clone();
Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
assertArraysEqual(parallelResult, sequentialResult);
String[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
Arrays.parallelPrefix(parallelRangeResult, op);
assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
}