How to fill an array with 4 random, non repeating numbers?

Question

here is my work so far:

const randNum=()=>Math.floor(Math.random()*4)

const tempArr=[randNum()]
for(let i=0;i<=4;i++){
let num=randNum();
while(!tempArr.includes(num)){
tempArr.push(num);
}
}

console.log(tempArr)

Answer 1

The loop you should be set to stop iterating once the tempArr length is four, meaning it should keep iterating however many times is necessary to get an array filled with four non-repeating numbers. I suggest using a while loop to do this.

const randNum=()=>Math.floor(Math.random()*4)

// while loop based on the length of tempArr
const tempArr=[randNum()]

while(tempArr.length < 4){
let num = randNum();
!tempArr.includes(num) && tempArr.push(num)
}

console.log(tempArr)

// recursion based on size of set object
const set = new Set();

const recurse = () => set.size < 4 && recurse(set.add(randNum()))

recurse()

console.log([...set])

Answer 2

ODLNT I love how you used && in the loop