I tried to use `(0 until list.size - 1). filter{ ...

# getting-started

[timurnav]

I tried to use
(0 until list.size - 1). filter{ list[it] == list[it + 1] }
but it doesn't work for case 333 -> 33
Do I not undestand smthng?

[Pavlo Liapota]

@timurnav

list.filterIndexed { i, x -> i == 0
        || x != list[i - 1]
        || (i + 1 < list.size && x == list[i + 1]) }

😄

[Pavlo Liapota]

ah, its about pair…
I thought you need to remove one from each sequence, i.e 1111 -> 111

[Pavlo Liapota]

seems it is not possible without a loop

val newList = arrayListOf<Int>()
var i = 0
while (i < list.size) {
    newList.add(list[i++])
    if (i < list.size && list[i - 1] == list[i]) i++
}