Discussion on: Javascript Sock Merchant Challenge - Solution 2

function socks_set(arr) {
  let pairs = 0
  const unpaired = new Set()

  for (const color of arr)
  if (unpaired.has(color)) {
      pairs++
      unpaired.delete(color)
    } else unpaired.add(color)

  return pairs
}
function socks_obj(ar) {
  const colors = {}
  let pairs = 0
  for (const color of ar) pairs += !(colors[color] = !colors[color])

  return pairs
}
function* good() {
  let i = 0
  while (i < 100000000) yield i++ >> 1
  return i >> 1
}
function* bad() {
  let i = 0
  while (i < 10000000) yield i++
  return i
}

console.log(socks_set(good()))
console.log(socks_obj(good()))
console.time("good Set")
socks_set(good())
console.timeEnd("good Set")
console.time("good Obj")
socks_obj(good())
console.timeEnd("good Obj")
console.time("good Set")
socks_set(good())
console.timeEnd("good Set")
console.time("good Obj")
socks_obj(good())
console.timeEnd("good Obj")

console.log(socks_set(bad()))
console.log(socks_obj(bad()))
console.time("bad Set")
socks_set(bad())
console.timeEnd("bad Set")
console.time("bad Obj")
socks_obj(bad())
console.timeEnd("bad Obj")
console.time("bad Set")
socks_set(bad())
console.timeEnd("bad Set")
console.time("bad Obj")
socks_obj(bad())
console.timeEnd("bad Obj")