我有类似的文件
import java.util.Scanner;
import java.util.Arrays;
public class PlayerRoster {
public static void inputStats(Scanner scan) {
int [] number = new int [5];
int [] rating = new int [5];
int jerseyNumber = 1;
for(int i = 0; i < number.length; i++){
System.out.printf("Enter player %d's jersey number\n", jerseyNumber);
number[i] = scan.nextInt();
System.out.printf("Enter players %d's rating\n", jerseyNumber);
rating[j] = scan.nextInt();
jerseyNumber++;
}
System.out.println(Arrays.toString(number));
System.out.println(Arrays.toString(rating));
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
inputStats(scan);
return;
}
}
如何汇总帖子字段中具有相同
User {
posts [{
polimer: string
clary: number
_id: mongoid
}]
}
字段的用户？
通过相同的polimer字段分组，并计算每个字段的数量？
我正在使用nodejs猫鼬