Write a function that checks if an array has duplicate values

a.js

function hasDuplicateValue(array) {
  let counter = 0
  for (let i = 0; i < array.length; i++) {
    for (let j = 0; j < array.length; j++) {
      counter++
      if (i !== j && array[i] === array[j]) {
        return true
      }
    }
  }
  console.log('number of steps', counter)
  return false
}

hasDuplicateValue([1, 2, 3, 5, 9])
// O(n^2)

b.js

function hasDuplicateValue(array) {
  const set = new Set()
  let counter = 0
  array.forEach((element) => {
    counter++
    set.add(element)
  })
  
  if (set.size !== array.length) {
    return true
  }
  console.log('number of steps', counter)
  return false
}

hasDuplicateValue([3, 2, 1, 5, 6])
// O(2n)