Aryaman1706

type RemoveUndefined<T extends any[]> = 
  T extends (infer R | undefined)[]
  ? R[]
  : T

// OK
type ArrayWithoutUndefined1 = RemoveUndefined<(string | number | undefined | Date)[]>
type ArrayWithoutUndefined2 = RemoveUndefined<(string | number | Date)[]>
type ArrayWithoutUndefined3 = RemoveUndefined<["hello", 1, 2, undefined, Date, {}]> // order is not maintained
type ArrayWithoutUndefined4 = RemoveUndefined<["hello", 1, 2, Date, {}]> // order is not maintained

Aryaman1706

// const arr: number[] = [1, 3, 2, 5, 0];

const findProductOfArr = (arr: number[]): number => {
    let product: number = 1;

    arr.forEach(num => {
        if(num !== 0) product = product * num;
    });

    return product;