How to usethe Array() Constructor in Javascript
JavaScript provides the Array() constructor, which allows us to create an array of a specific length. We can use this constructor to create a 2D array by initializing each element as an empty array.
function createEmpty2DArray(rows, cols) {
return Array.from({ length: rows }, () => Array(cols).fill(null));
};
Example: In this example, the Empty2DArray function uses Array.from() method to create a 2D array with 3 rows and 5 columns, initializing all elements to null. The arr2 holds the result.
function Empty2DArray(rows, cols) {
return Array.from({ length: rows },
() => Array(cols).fill(null));
}
let arr2 = Empty2DArray(3, 5);
console.log(arr2);
Output
[ [ null, null, null, null, null ], [ null, null, null, null, null ], [ null, null, null, null, null ] ]
How to Declare Two Dimensional Empty Array in JavaScript ?
In this article, we are going to learn about Declare two-dimensional empty array by using JavaScript. A two-dimensional array is also known as a 2D array. It is a data structure in JavaScript that can hold values in rows and columns form. It is an array of arrays. Each element in a 2D array is accessible using two indices, and it is represented as an array[rowIndex][columnIndex].
There are several methods that can be used to add elements to Declare an empty two-dimensional array in JavaScript, which are listed below:
Table of Content
- Using a Loop
- Using the Array() Constructor
We will explore all the above methods along with their basic implementation with the help of examples.
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