Java Stream Operation mapElementsSizes(IntStream intStream)

Description

map Elements Sizes

License

Open Source License

Declaration

public static int mapElementsSizes(IntStream intStream) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.OptionalInt;

import java.util.stream.IntStream;

public class Main {
    public static int mapElementsSizes(IntStream intStream) {
        OptionalInt n = intStream.reduce((a, b) -> (a == -1) ? -1 : (b == 1) ? a : (a == b) ? a : (a == 1) ? b : -1
        //          reduce() return -1
        //                          no changes of a
        //                                         no changes of a
        //                                                        change to b
        //                                                             change to -1
        );//from  www  .ja v a2 s. c o m
        return n.isPresent() ? n.getAsInt() : 1;
    }
}

Related

1. lazyPartition(final Stream stream, final int maxPartitionSize)
2. lazyStream(PrimitiveIterator.OfLong iterator)
3. longArray(Stream stream)
4. longList(LongStream stream)
5. makeStream(final Object[] array)
6. maximum(final Stream stream)
7. maxLong(Stream stream)
8. maxStringLength(Stream stringStream)
9. mkString(Stream items, String prefix, String delimiter, String suffix)