// Here we create an array 'a' that will hold exactly 5 elements.
// In JavaScript, arrays are zero-indexed and can dynamically change in size.
let a = new Array(5);
console.log("emp:", a);

// We can set a value at an index using the
// array[index] = value syntax, and get a value with
// array[index].
a[4] = 100;
console.log("set:", a);
console.log("get:", a[4]);

// The length property returns the length of an array.
console.log("len:", a.length);

// Use this syntax to declare and initialize an array
// in one line.
let b = [1, 2, 3, 4, 5];
console.log("dcl:", b);

// In JavaScript, we don't need to specify the size of the array
// when initializing it. It will automatically adjust.
b = [1, 2, 3, 4, 5];
console.log("dcl:", b);

// JavaScript doesn't have a direct equivalent to Go's index-based
// initialization. However, we can achieve a similar result like this:
b = [100, , , 400, 500];
console.log("idx:", b);

// Array types are one-dimensional, but you can
// create multi-dimensional arrays by nesting arrays.
let twoD = Array(2).fill().map(() => Array(3).fill(0));
for (let i = 0; i < 2; i++) {
    for (let j = 0; j < 3; j++) {
        twoD[i][j] = i + j;
    }
}
console.log("2d: ", twoD);

// You can create and initialize multi-dimensional
// arrays at once too.
twoD = [
    [1, 2, 3],
    [1, 2, 3],
];
console.log("2d: ", twoD);