If you have been working with arrays in JavaScript until now, you've definitely encountered scenarios where arrays were multidimensional, and to access the elements inside, additional code was necessary. This is where the Array.flat method comes in handy. This method helps flatten arrays to a depth that you can specify, reducing the complexity of additional nested arrays.
For example, imagine you have an array that might contain another array at every level. This method helps bring all arrays to a single lower level, making it easier to access any elements you want to find. How brilliant is that, right?
The interesting point is that this method works only for two or three-dimensional arrays! You can determine the degree of flattening yourself. This means that if an array is nested to a certain level, you can flatten it to the required depth.
Now, let me show you an example to better understand this concept:
const arr = [1, 2, [3, 4, [5, 6]]];
const flatArr = arr.flat(2);
console.log(flatArr); // Output: [1, 2, 3, 4, 5, 6]
Code Explanation:
const arr = [1, 2, [3, 4, [5, 6]]];
This line defines a multidimensional array that has several levels.
const flatArr = arr.flat(2);
Here, we use the flat method to flatten the array to a depth of two.
console.log(flatArr);
In the end, when we print the result, we see that the flattened array has placed all elements on one level.