To increment an array of digits (0 to 9) in code, you can start at the end of the array and add 1 to the last element. If the result is less than 10, you can stop and return the array. If the result is 10, set the last element to 0 and continue on to the second-to-last element. Repeat this process until you reach the beginning of the array. If the first element of the array is set to 0, you will need to add an extra element to the beginning of the array with a value of 1.
Here's an implementation of this algorithm in JavaScript:
`javascript function incrementArray(arr) { for (let i = arr.length - 1; i >= 0; i--) { if (arr[i] + 1 < 10) { arr[i]++; return arr; } else { arr[i] = 0; } } return [1, ...arr]; } `

This function takes an array of digits and returns the array with 1 added to it. If the array is `[0, 9]`

, for example, the function will return `[1, 0]`

. If the array is `[9, 9]`

, the function will return `[1, 0, 0]`

.
Remember to test edge cases and handle errors appropriately in your implementation.

Technical