How can I make a random array with no repeats?

Question

I\'ve been searching around for some answers to this issue, but nothing seems to work when I try to find a solution.

What I\'m trying to achieve is to make a spinner

Answer 1

Another approach you could take given the fact that you already have the array values and you need to randomize their position is to generate a unique random values with Set:

var data = ['360', '330', '300', '270', '240', '210','180', '150', '120', '90', '60', '30'];

let getUniqueRandomNumbers = n => {
  let set = new Set()
  while (set.size < n) set.add(Math.floor(Math.random() * n))
  return Array.from(set)
}

let result = getUniqueRandomNumbers(data.length).map(x => data[x])

console.log(result)

The idea is to generate the indexes of the new array and then using those to populate it via Array.map.

Another approach you could take is via Array.sort and Math.random:

var data = ['360', '330', '300', '270', '240', '210','180', '150', '120', '90', '60', '30'];

let result = data.sort(function(a, b){
 return 0.5 - Math.random()  // <— sort needs a number and this makes it work
});

console.log(result);