const stray = numbers => {
let number = 0
numbers.forEach(x => numbers.indexOf(x) ? number = x : null)
return number
}
console.log(stray([17, 17, 3, 17, 17, 17, 17]))// You are given an odd-length array of integers, in which all of them are the same, except for one single number.
// Complete the method which accepts such an array, and returns that single different number.
// The input array will always be valid! (odd-length >= 3)
const stray = function (numbers) {
let number = 0
numbers.forEach(x => { if(numbers.indexOf(x) < 1) number = x })
numbers.forEach(x => { if(numbers.indexOf(x) > 1) number = x })
return number
}
// With love @kouqhar