JSFiddle - React, Tailwind, and code Playground

by Jessie Lau

JavaScript

function diagonalSum(matrix) {
    return matrix.reduce(function(initial, curre, i){
        return initial + curre[i];
    }, 0);
}
console.log(diagonalSum([
    [1, 2],
    [3, 4],
    [5, 6, 7],
    [6, 7, 8, 9, 0]
]));