5 Lines Iterator JS

fliter.js

// Five Lines Iterator [ fliter (╥﹏╥) ]
const fliter = (a, p = 0) => ({
  hasNext: () => p < a.length,
  next:    () => a[p++],
  remove:  () => a.splice(--p, 1)
})

/* Minified
 * const fliter=(a,p=0)=>({hasNext:()=>p<a.length,next:()=>a[p++],remove:()=>a.splice(--p,1)})
 */

/* --- EXAMPLE --- */
const array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
const iterArr = fliter(array);

while (iterArr.hasNext()) {
  const val = iterArr.next()
  console.log(val) // 0 .. 1 .. 2 .. 3 .. 4 .. 5 .. 6 .. 7 .. 8 .. 9

  if (val > 5)
    iterArr.remove()
}

console.log()      // < empty line >
console.log(array) // [ 0, 1, 2, 3, 4, 5 ]