数组元素积的符号

// Solution in Java using Java Streams
// Similar to the basic Java solution, but utilizes Java Streams for a more functional approach.
// We can use the reduce method to compute the sign without actually calculating the product.
// We map each number to a sign value, then reduce by multiplying these signs together.

import java.util.Arrays;

public class StreamSolution {
    public int arraySign(int[] nums) {
        int sign = Arrays.stream(nums)
                         .map(n -> n == 0 ? 0 : (n > 0 ? 1 : -1))
                         .reduce(1, (a, b) -> a * b);
        return sign;
    }
}