Matrix Diagonal Sum Lab
In this lab, you will be working on finding the sum of matrix diagonals. Given a square matrix mat
, your task is to return the sum of the matrix diagonals. You need to include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of the primary diagonal.
Lab Requirements
Make sure to follow these requirements:
- Use ESM import/export everywhere.
- The final length of the array
testlog
should be the same as the number of challenges. - The order of evaluation script try-catch blocks must match the order of challenges written.
Description
Given a square matrix mat
, return the sum of the matrix diagonals.
Only include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of the primary diagonal.
Example 1:
Input: mat = [[1,2,3],
[4,5,6],
[7,8,9]]
Output: 25
Explanation: Diagonals sum: 1 + 5 + 9 + 3 + 7 = 25
Notice that element mat[1][1] = 5 is counted only once.
Example 2:
Input: mat = [[1,1,1,1],
[1,1,1,1],
[1,1,1,1],
[1,1,1,1]]
Output: 8
Example 3:
Input: mat = [[5]]
Output: 5
Constraints:
n == mat.length == mat[i].length
1 <= n <= 100
1 <= mat[i][j] <= 100
Challenges
- Implement the
diagonalSum
function that takes a square matrixmat
and returns the sum of the matrix diagonals. Make sure to export this function. - Test your implementation with various inputs and make sure it is working correctly.
Initial File Structure
You will be provided with the following initial file structure:
/** * @param {number[][]} mat * @return {number} */ var diagonalSum = function(mat) { };
{ "name": "codedamn-lab", "type": "module" }
tabs: ['index.js'] terminals: ['yarn install']
Happy Coding!