const checkAndLog = x => {
  console.log('passed by', x)
  return Number.isInteger(x)
}

const xs = [1, 2, 3, 4, 5]
const ys = [6, 7, 'a', 9, 10]

const areXsIntegers = xs.every(checkAndLog)
// passed by 1
// passed by 2
// passed by 3
// passed by 4
// passed by 5
console.log(areXsIntegers) // true

const areYsIntegers = ys.every(checkAndLog)
// passed by 6
// passed by 7
// passed by a
console.log(areYsIntegers) // false