Topic Description

Create a fill function that takes four parameters:

• array: The input array to be modified
• value: The value to replace the existing elements with
• start: The start index (inclusive) from which to start replacing elements. Defaults to 0 if not provided.
• end: The end index (exclusive) up to which elements should be replaced. Defaults to the array length if not provided.

The fill function should replace the elements of the input array with the specified value from the start index to the end index, effectively filling the specified range with the given value.

console.log(fill([1, 2, 3], '*')); // ['*', '*', '*']

console.log(fill([1, 2], '*', 2, 3)); // [1, 2]

console.log(fill([1, 2, 3, 4, 5], '*', 1, -1)); // [1, '*', '*', '*', 5]

Answer

function fill(array, value, start=0, end){
	if(start < 0){
		start = array.length + start
	}
	if(end < 0){
		end = array.length + end
	}
	if(end > array.length){
		end = array.length
	}
	
	for(let i=start; i<end; i++){
		array[i]=value
	}
	return array;
}