JSFiddle - React, Tailwind, and code Playground

by igalst

JavaScript

console.log("=========");

var arr = [
    ["a1", "b1", "c1", "d1"],
    ["a2", "b2", "c2", "d2"],
    ["a3", "b3", "c3", "d3"],
    ["a4", "b4", "c4", "d4"]
];

for (var i = 0; i < arr.length; i++) {
    console.log(arr[i][i]);
}

console.log("----");

var max = arr.length - 1;
for (var i = 0; i <= max; i++) {
    console.log(arr[max - i][i]);
}