package net.mrpaul.mh180.ps12;

/**
 * Makes 2d Array methods
 * This program creates certain methods to be run on and using 2-dimensional arrays.
 * <p>
 * ADS PS12: Sort It Out
 * 2/22/18
 *
 * @author Dhruv Rajagopal
 */

public class Exercises2dArr {
    //Main method, makes sample 2d arrays and runs methods on them.
    public static void main(String[] args) {
        int[][] a1 = {{1, 2, 3, 4}, {1, 2, 3, 4}, {1, 2, 3, 4}, {1, 2, 3, 4}};
        int[] arr = collapseRows(a1);
        for(int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }


        int[][] a2 = generateRagged(3);
        for(int i = 0; i < a2.length; i++) {
            for(int j = 0; j < a2[i].length; j++) {
                System.out.println(a2[i][j]);
            }
            System.out.println();
        }
    }



    public static int[] collapseRows(int[][] a) {
        int[] sum = new int[a.length];
        for(int i = 0; i < a.length; i++) {
            for(int j = 0; j < a[i].length; j++) {
                sum[i] += a[i][j];
            }
        }
        return sum;
    }

    public static int[][] generateRagged(int n){
        int count = 0;
        int[][] ragged = new int[n][];

        for(int i = 0; i < ragged.length; i++) {
            ragged[i] = new int[i + 1];
            for(int j = 0; j < i + 1; j++) {
                count++;
                ragged[i][j] = count;
            }
        }
        return ragged;
    }
}