is there another way to loop an ArrayList in rever...

# announcements

[elect]

is there another way to loop an ArrayList in reverse (from last to first) without creating additional lists (such as .reversed()) other than

for(i in g.windows.lastIndex downTo 0) {
    val window = g.windows[i]

? Ps: I do need continue and break inside

[Big Chungus]

If you need continue & break, then for is the only choice, no matter the use-case

[elect]

ok, thanks

[Big Chungus]

Well you could also use while, but that's even dirtier

[elect]

yep, I was looking to something more concise and still efficient..

[PHaroZ]

.asRerversed() do not create new list : https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/as-reversed.html

[elect]

ah, interesting.. it's a new class though
public fun <T> MutableList<T>.asReversed(): MutableList<T> = ReversedList(this)

[elect]

but so is downTo as well actually..

[elect]

although maybe it gets optimized?

[Big Chungus]

True, but you cannot use break & continue in DSLs

[PHaroZ]

sorry, I didn't seen the PS

[Nir]

You can still use a regular for loop with asReversed

[Big Chungus]

Adds unecessary overhead when compared with downTo

[Nir]

Seems pretty premature optimization-y :-)

[Nir]

It's more readable IMHO