Skip to content

Instantly share code, notes, and snippets.

@Roughtron

Roughtron/example1

Created December 18, 2016 10:49
Show Gist options
  • Save Roughtron/673ddd6417ac43d0953765ca066cf8a8 to your computer and use it in GitHub Desktop.
Save Roughtron/673ddd6417ac43d0953765ca066cf8a8 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
example1
var matrixExample = [
[ 1, 2, 3, 4 ],
[ 4, 5, 6, 5 ],
[ 7, 8, 9, 7 ],
[ 7, 8, 9, 7 ]
];
function sumMainDiagonal(matrix) {
var sum = 0;
for (var i = 0; i < matrix.length; i++) {
sum += matrix[i][i];
}
return sum;
}
function sumSecondaryDiagonal(matrix) {
var sum = 0;
for (var i = 0; i < matrix.length; i++) {
sum += matrix[i][matrix.length - i - 1];
}
return sum;
}
function sumUpDiagonals(matrix) {
return sumMainDiagonal(matrix) + sumSecondaryDiagonal(matrix);
}
console.log(sumUpDiagonals(matrixExample))
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment