const nCArr = (arr, n) => { let newArr = []; while ( newArr.length < n) { let num = Math.floor(Math.random() * (arr.length)) if (newArr.indexOf(arr[num]) === -1) { newArr.push(arr[num]) } } return newArr}nCArr([1, 2, 3, 4, 5, 6, 7, 89, 1, 2, 4, 5], 5)
