help any ideas how to implement this kotlinlang #announcements

Can you edit this message and put everything else you posted here in it please? You’re writting in a channel with more than 25k people, we try not to spam

For your question, you named your function

repeatWhile

, it would see logical to me to use a function returning a Boolean instead

iex

01/09/2020, 12:53 PM

let me edit the name, this is outdated

How can I exit the loop?

ribesg

01/09/2020, 12:54 PM

if (!f()) break

if (f()) break

, whatever

iex

01/09/2020, 12:57 PM

is there no way to be able to exit it similar to what I did?

the reason I don't want to use return is a bit discussable. But curious in any case

ribesg

01/09/2020, 12:58 PM

You can’t make a passed parameter know the label of a basic for-loop

Ok, you could use a more complex solution. You could define a class which would manage the loop. This class would be the receiver of

and have a function to stop the loop

iex

01/09/2020, 12:59 PM

the label isn't really the problem though. If I remove it it says "break" can't jump across a function or class boundary

hmm that might work

okay thanks. At leat I know now what's possible and what's not 🙂

btw it's not possible to force a return statement in a closure to apply only for the closure and not the enclosing function right?

Marat Akhin

01/09/2020, 1:04 PM

For that you can use labeled return: https://kotlinlang.org/docs/reference/returns.html#return-at-labels

☝️ 1

iex

01/09/2020, 1:06 PM

great thanks!

Stephan Schroeder

01/09/2020, 4:56 PM

how about the function you want to retry returns if it was successful (and therefore doesn’t need further retries):

Copy code

fun retry(maxTimes: Int, f: () -> Boolean) {
    for (index in 0 until maxTimes) {
        val wasSuccessful = f()
        if(wasSuccessful) break
    }
}

iex

01/10/2020, 1:21 PM

I think this was already suggested in the thread, but I wanted to exit early in the block

darkmoon_uk

01/14/2020, 6:55 AM

@iex This is pure noise, no idea what you are even asking. Please explain your problems/questions better in future.

iex

01/14/2020, 9:19 AM

@darkmoon_uk did you expand the message? 🤔 not a poster-child question, but it seems fairly understandable.

I also find there are better ways to communicate what you're saying. "Pure noise" isn't accurate and unnecessarily confrontational.