replacing a value into an array in javascript

To replace a value in an array in Javascript, you can use the splice() method which allows you to add or remove elements at a particular index. Here's an example of how you can replace a value:

index.tsx
let arr = [1, 2, 3, 4, 5];

// Let's replace the value 3 with 6
let index = arr.indexOf(3); // Get the index of the value to be replaced
arr.splice(index, 1, 6); // Replace the value at the index with 6

console.log(arr); // Output: [1, 2, 6, 4, 5]
249 chars
8 lines

In the example above, we first get the index of the value to be replaced using the indexOf() method. We then use the splice() method to replace the value at that index with the new value (in this case, the value 6).

Note that the splice() method mutates the original array, so be careful when using it.