ucuseless code

console.log(...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[...[0]]]]]]]]]]]]]]]]]]]]]]]]]]])

(ooo,oo,o) => [ooo||o||ooo] <= (o,oo,ooo)

function a() {
  b()
}
function b() {
  a()
}

if (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) {
  console.log(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
}

function a(x) {
  return x
}
console.log(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(0)))))))))))))))))))))))))))))))))

f()
function f() {
  return true
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
  return false
}

function f() {
  return true
  return false
  return false
}
f()