What's the best way to implement a 2D array in JavaScript?

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1

I’m confused about 2D arrays in JavaScript. There’s a lot of conflicting info online. Some say it’s not possible, others give examples, and then people argue about those examples. It’s driving me crazy!

Here’s what I want to know:

  1. Is it actually possible to make a 2D array in JavaScript? If so, how do I do it?

  2. Once I have a 2D array, how do I get stuff out of it? Do I use square brackets like myArray[0][1] or do I use commas like myArray[0,1]?

I tried to figure this out on my own, but now I’m more confused than when I started. Can anyone explain this in simple terms? Maybe with a basic example? Thanks in advance!

2

yeah, 2D arrays in JS are totally doable! i use 'em all the time. it’s just arrays inside arrays, like:

let myGrid = [[1,2],[3,4]];

to grab stuff, use two square brackets:

let x = myGrid[0][1]; // gives you 2

easy peasy! dont stress about the online debates, this way works great.

3

As someone who’s worked extensively with JavaScript, I can assure you that 2D arrays are definitely possible and quite useful. Here’s the straightforward approach I use:

You can create a 2D array by nesting arrays within an array. For example:

let myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

This creates a 3x3 grid. To access elements, you use square brackets twice, like this:

let element = myArray[1][2]; // This would give you 6

The first index (1) selects the second inner array, and the second index (2) selects the third element in that array.

I’ve found this method to be reliable and easy to understand. It’s served me well in various projects, from game development to data processing. Don’t let the online debates confuse you - this approach works consistently across modern JavaScript environments.

4

I’ve been working with JavaScript for years, and I can confirm that 2D arrays are indeed possible and quite straightforward. Here’s the gist:

JavaScript doesn’t have built-in 2D arrays, but we simulate them using arrays of arrays. It’s simple:

let grid = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]
];

To access elements, use double square brackets:

let value = grid[1][2]; // This gives you 6

The first index selects the row, the second the column. It’s intuitive once you get used to it.

I’ve used this approach in numerous projects without issues. Don’t overthink it – it’s a reliable method that works across all modern JavaScript environments.