WHEN_ENUM_CAN_BE_NULL_IN_JAVA

is so annoying, then my enum is in kotlin

Is there a preferred database strategy in Kotlin?

is there a good, complete example on github of android app developed in Kotlin? Or a free tutorial to build an android app with a nice UI? Thank you!

Hi! I need convert string bellow to valid JSON:

{
ChallengeParameters: {},
AuthenticationResult: {
AccessToken: eyJraWQiOiI3Qnw,
ExpiresIn: 3600,
TokenType: Bearer,
RefreshToken: yJjdHkiOCcr
}
}

There is simple solution?

@karelpeeters yup. This is simple. I need add only

.

and

-

(internal token char) in regex and run.

Is there a simple way to convert a

List<Pair<T,S>>

to

Map<T,S>

?

but I do not know how generics work with two parameters

Looking for your suggestion. I just want to draw a path on map and then directive people for that rotate.

Hi All, I have 3+ years of experience on Java, let me know from where I should start learning Kotlin

Hi guys, just a quick question, I was trying to make this:

with(dataList as RecyclerView) {
            layoutManager = createNewLayoutManager()
 ....
}

So I have the RecyclerView and set all the params, but it's not working. It works only if I make the direct cast like this: (dataList as RecyclerView).layoutManager = createNewLayoutManager() What I am doing wrong?

how do I map a single object to some other object? for example with

val key:String? = getKey() ; key?.mapSingle{ getValue(it) }?.{println(it)}

what should keyword should replace

mapSingle

How do I turn Java code into Kotlin code? I've heard Intellij can do it automatically, but how do I do it in notepad++?

How do I create a zip file in memory only, using files from a relative directory?

Because I can't find anything that allows me to both read and write to a ZipFile object or ZipFile...Stream

I have a more general question: Does anyone know a good article which points out the reasons why I should move from Java to Kotlin? I want to introduce kotlin within my company and I am looking for every good document to show my colleagues all advantages of Kotlin. As I am at a beginning point by myself it would be great to have knowledge based articles and stuff like that. Thanks for help!

Hello! I have a question about the language, please if Im in the wrong channel tell me. I have two variables in a class, one is a

lateinit var myVariable1

that will be injected later and another one is a val that is initialised by a extension function that returns a

lazy

with the function that initialises my

variable2

(this extension needs my previous

lateinit var myVariable1

by parameter) . When Im creating my class, Im receiving an error because the ´lateinit var myVariable1´ is null at the moment that the class is created(and lateinit cannot be null). Shouldnt this be protected? As Im using only that` lateinit var myVariable1` parameter in my lazy function, that will be triggered always after my ´lateinit var´ is injected?

how can I write for loop with condition?

var i = 0
while (i < Math.min(all.size, maxSize)) {
}

other than while, so I can keep the i var indite the loop scope

id like to also ask how to rewrite this in more functional style

val maxSize = BookDao.RECENTS_SIZE
val all = mutableListOf<RealmObject>()
all.addAll(it.findAllRecentSearchedBooks().run { if (this.size > maxSize) subList(0, maxSize) else this })
all.addAll(it.findAllRecentSearchedAuthors().run { if (this.size > maxSize) subList(0, maxSize) else this })

all.sortByDescending {
	when (it) {
	        is RecentlySearchedBook -> it.timestamp
	        is RecentlySearchedAuthor -> it.timestamp
	        else -> error("Unknown type")
        }
}

val allUnmamaged = mutableListOf<SearchItem>()
for (i in 0 until Math.min(all.size, maxSize)) {
	allUnmamaged.add(it.unmanaged(all[i]) as SearchItem)
}

allUnmamaged

can you make all the functions on an object static by annotating the object itself?

Is there no buildin comparator for booleans? Like there is

nullFirst

for nulls.

is there a way I can initialize my arrays in a loop, without them being of nullable items?

is there nicer way, to lazy initialize nullable property, without then using !! ?

How do I make it correct (i.e: how to access

print()

in this case)

Why cant I have public propety with public setter and private getter?

am I looking for let?

I want to perform a

reduce

operation but I want my accumulator value to be a different type than the types and I want to provide my initial value. Here’s an example using Int and String

listOf("1", "10", "100", "1000").reduce(withInitial = 0) { acc: Int, current: String ->
    acc + current.toInt()
} // should result in Int(1111)

as in: null safe?

Yeah that's the point of a conversion tool isn't it?

Whats POLA? Yes it works