https://kotlinlang.org logo
Docs
Join the conversationJoin Slack
Channels
100daysofcode
100daysofkotlin
100daysofkotlin-2021
advent-of-code
aem
ai
alexa
algeria
algolialibraries
amsterdam
android
android-architecture
android-databinding
android-studio
androidgithubprojects
androidthings
androidx
androidx-xprocessing
anime
anko
announcements
apollo-kotlin
appintro
arabic
argentina
arkenv
arksemdevteam
armenia
arrow
arrow-contributors
arrow-meta
ass
atlanta
atm17
atrium
austin
australia
austria
awesome-kotlin
ballast
bangladesh
barcelona
bayarea
bazel
beepiz-libraries
belgium
berlin
big-data
books
boston
brazil
brikk
budapest
build
build-tools
bulgaria
bydgoszcz
cambodia
canada
carrat
carrat-dev
carrat-feed
chicago
chile
china
chucker
cincinnati-user-group
cli
clikt
cloudfoundry
cn
cobalt
code-coverage
codeforces
codemash-precompiler
codereview
codingame
codingconventions
coimbatore
collaborations
colombia
colorado
communities
competitive-programming
competitivecoding
compiler
compose
compose-android
compose-desktop
compose-hiring
compose-ios
compose-mp
compose-ui-showcase
compose-wear
compose-web
connect-audit-events
corda
cork
coroutines
couchbase
coursera
croatia
cryptography
cscenter-course-2016
cucumber-bdd
cyprus
czech
dagger
data2viz
databinding
datascience
dckotlin
debugging
decompose
decouple
denmark
deprecated
detekt
detekt-hint
dev-core
dfw
docs-revamped
dokka
domain-driven-design
doodle
dsl
dublin
dutch
eap
eclipse
ecuador
edinburgh
education
effective-kotlin
effectivekotlin
emacs
embedded-kotlin
estatik
event21-community-content
events
exposed
failgood
fb-internal-demo
feed
firebase
flow
fluid-libraries
forkhandles
forum
fosdem
fp-in-kotlin
framework-elide
freenode
french
fritz2
fuchsia
functional
funktionale
gamedev
ge-kotlin
general-advice
georgia
geospatial
german-lang
getting-started
github-workflows-kt
glance
godot-kotlin
google-io
gradle
graphic
graphkool
graphql
graphql-kotlin
graviton-browser
greece
grpc
gsoc
gui
hackathons
hacktoberfest
hamburg
hamkrest
helios
helsinki
hexagon
hibernate
hikari-cp
hire-me
hiring
hongkong
hoplite
http4k
hungary
hyderabad
image-processing
india
indonesia
inkremental
intellij
intellij-plugins
intellij-tricks
internships
introduce-yourself
io
ios
iran
israel
istanbulcoders
italian
jackson-kotlin
jadx
japanese
jasync-sql
java-to-kotlin-refactoring
javadevelopers
javafx
javalin
javascript
jdbi
jhipster-kotlin
jobsworldwide
jpa
jshdq
juul-libraries
jvm-ir-backend-feedback
jxadapter
k2-early-adopters
kaal
kafka
kakao
kalasim
kapt
karachi
karg
karlsruhe
kash_shell
kaskade
kbuild
kdbc
kgen-doc-tools
kgraphql
kinta
klaxon
klock
kloudformation
kmdc
kmm-español
kmongo
knbt
knote
koalaql
koans
kobalt
kobweb
kodein
kodex
kohesive
koin
koin-dev
komapper
kondor-json
kong
kontent
kontributors
korau
korean
korge
korim
korio
korlibs
korte
kotest
kotest-contributors
kotless
kotlick
kotlin-asia
kotlin-beam
kotlin-by-example
kotlin-csv
kotlin-data-storage
kotlin-foundation
kotlin-fuel
kotlin-in-action
kotlin-inject
kotlin-latam
kotlin-logging
kotlin-multiplatform-contest
kotlin-mumbai
kotlin-native
kotlin-pakistan
kotlin-plugin
kotlin-pune
kotlin-roadmap
kotlin-samples
kotlin-sap
kotlin-serbia
kotlin-spark
kotlin-szeged
kotlin-website
kotlinacademy
kotlinbot
kotlinconf
kotlindl
kotlinforbeginners
kotlingforbeginners
kotlinlondon
kotlinmad
kotlinprogrammers
kotlinsu
kotlintest
kotlintest-devs
kotlintlv
kotlinultimatechallenge
kotlinx-datetime
kotlinx-files
kotlinx-html
kotrix
kotson
kovenant
kprompt
kraph
krawler
kroto-plus
ksp
ktcc
ktfmt
ktlint
ktor
ktp
kubed
kug-leads
kug-torino
kvision
kweb
lambdaworld_cadiz
lanark
language-evolution
language-proposals
latvia
leakcanary
leedskotlinusergroup
lets-have-fun
libgdx
libkgd
library-development
linkeddata
lithuania
london
losangeles
lottie
love
lychee
macedonia
machinelearningbawas
madrid
malaysia
mathematics
meetkotlin
memes
meta
metro-detroit
mexico
miami
micronaut
minnesota
minutest
mirror
mockk
moko
moldova
monsterpuzzle
montreal
moonbean
morocco
motionlayout
mpapt
mu
multiplatform
mumbai
munich
mvikotlin
mvrx
myndocs-oauth2-server
naming
navigation-architecture-component
nepal
new-mexico
new-zealand
newname
nigeria
nodejs
norway
npm-publish
nyc
oceania
ohio-kotlin-users
oldenburg
oolong
opensource
orbit-mvi
osgi
otpisani
package-search
pakistan
panamá
pattern-matching
pbandk
pdx
peru
philippines
phoenix
pinoy
pocketgitclient
polish
popkorn
portugal
practical-functional-programming
proguard
prozis-android-backup
pyhsikal
python
python-contributors
quasar
random
re
react
reaktive
realm
realworldkotlin
reductor
reduks
redux
redux-kotlin
refactoring-to-kotlin
reflect
refreshversions
reports
result
rethink
revolver
rhein-main
rocksdb
romania
room
rpi-pico
rsocket
russian
russian_feed
russian-kotlinasfirst
rx
rxjava
san-diego
science
scotland
scrcast
scrimage
script
scripting
seattle
serialization
server
sg-user-group
singapore
skia-wasm-interop-temp
skrape-it
slovak
snake
sofl-user-group
southafrica
spacemacs
spain
spanish
speaking
spek
spin
splitties
spotify-mobius
spring
spring-security
squarelibraries
stackoverflow
stacks
stayhungrystayfoolish
stdlib
stlouis
strife-discord-lib
strikt
students
stuttgart
sudan
swagger-gradle-codegen
swarm
sweden
swing
swiss-user-group
switzerland
talking-kotlin
tallinn
tampa
teamcity
tegal
tempe
tensorflow
terminal
test
testing
testtestest
texas
tgbotapi
thailand
tornadofx
touchlab-tools
training
tricity-kotlin-user-group
trójmiasto
truth
tunisia
turkey
turkiye
twitter-feed
uae
udacityindia
uk
ukrainian
uniflow
unkonf
uruguay
utah
uuid
vancouver
vankotlin
vertx
videos
vienna
vietnam
vim
vkug
vuejs
web-mpp
webassembly
webrtc
wimix_sentry
wwdc
zircon
Powered by Linen
naming
  • y

    yschimke

    10/19/2022, 7:26 AM
    Shouldn't this be #nomenclature ?
    a
    r
    • 3
    • 2
  • h

    hhariri

    10/19/2022, 7:43 AM
    @yschimke actually we could have called it nominatio.
  • s

    Stefan Oltmann

    10/19/2022, 7:57 AM
    Let's keep it simple 🙂
  • e

    efemoney

    10/19/2022, 8:31 AM
    Yeah I also vote for calling it #simple 😄
  • l

    louiscad

    10/19/2022, 8:32 AM
    Hello, my name is Louis Cognault Ayeva Derman, but it's too long, so just keep it simple and call me Louis CAD. Thank you.
    a
    v
    • 3
    • 3
  • l

    louiscad

    10/19/2022, 8:33 AM
    Love acronyms BTW.
  • r

    ribesg

    10/19/2022, 8:35 AM
    Oh, so the whole time it was just about how to name Louis, I see
  • j

    Jonas

    10/19/2022, 8:39 AM
    😅 I like the coincidence, as I already had a naming question today. We currently try to split up our composables into container (with viewmodel) and stateless view. In this example the container is suffixed with
    Route
    - which I do not like. I also do not like to suffix the view with
    View
    - as this term is really overloaded on Android. Any suggestions?
    l
    s
    p
    • 4
    • 5
  • e

    Emil Kantis

    10/19/2022, 3:06 PM
    I could use some help in naming this thing. It is a mutable, stateful object. It will keep growing in size and responsibilities for many years to come. It's current primary function is converting formula to excrement, but hopefully it will get better capabilities soon. The first version is called Cassandra, but we haven't come up with a name for this one yet.. 😬
    l
    a
    +2
    • 5
    • 11
  • r

    Ruckus

    10/19/2022, 4:05 PM
    What is your preferred nomenclature for two functions that do the same thing, but one mutates the object, whereas the other returns a new object?
    r
    o
    +5
    • 8
    • 42
  • l

    Landry Norris

    10/19/2022, 8:29 PM
    This may not be strictly naming related, but when you read the :: syntax in kotlin (such as checking ::myVar.isInitialized or passing a method reference to a lambda), how do y’all pronounce it in your head?
    s
    l
    +2
    • 5
    • 11
  • p

    Pablichjenkov

    10/20/2022, 9:11 PM
    Compose related one. In a composable function body, composition could happen when the function is called again with new input parameters or composition could happen from mutableStateOf(state) declare in the body itself. I find my self referring to it as
    external triggered composition
    and
    internal triggered composition
    respectively. Any one else using these terms or just not distinguish between the 2? Perhaps
    input parameter triggered
    vs
    internal state triggered
    a
    • 2
    • 1
  • m

    Matteo Mirk

    10/21/2022, 8:59 AM
    Love this channel! :cool-doge:
  • m

    Marc Reichelt

    10/21/2022, 9:26 AM
    Hey there! Has someone also stumbled over how
    iosSimulatorArm64()
    ,
    iosX64()
    and
    iosArm64()
    are named? •
    iosArm64()
    is for a device •
    iosX64()
    is for a simulator •
    iosSimulatorArm64()
    is for a simulator How could we name these better?
    l
    j
    +4
    • 7
    • 28
  • s

    sarmad sohaib

    10/22/2022, 2:42 PM
    Please tell me best way to name ids in android xml? Thanks
    o
    x
    a
    • 4
    • 4
  • g

    George

    10/24/2022, 1:14 PM
    it's a wrapper for db transactional operations
    internal inline fun <T> runRecoveringTransaction(transaction: () -> T?): T? {
        val result = runCatching { transaction() }
        return result.getOrElse {
            if (it is DataIntegrityViolationException) return null else throw it
        }
    }
    any suggestions for better name? •
    recoverTransaction
    -> i think it's a bit generic •
    ifRollbackReturnNull
    -> a bit weird?
    y
    p
    • 3
    • 3
  • p

    Paul Woitaschek

    10/24/2022, 5:58 PM
    I'll so gonna use this channel when we'll have the next baby 😁
    c
    x
    y
    • 4
    • 4
  • y

    Youssef Shoaib [MOD]

    10/27/2022, 2:23 AM
    What's everyone's take on the classic "naming a library a word with C's replaced with K's"? 1️⃣ : It's getting old 2️⃣ : I'm still krazy for it! 3️⃣ : Indifferent/it depends
    a
    k
    +4
    • 7
    • 7
  • m

    MR3Y

    11/08/2022, 1:32 PM
    I find myself writing a lot of repetitive code like this:
    return try {
        // ...
    } catch (e: Exception) {
        handleError(e)
    }
    in some classes that have similar purposes. so, I decided to extract that block into a separate function called something like
    runCatching
    return runCatching { ... }
    but the problem is that it would be easily confused with the standard
    kotlin.runCatching
    , and I'm not using
    kotlin.Result
    either. so, I want a good name for that function but I can't think of any name other than
    runCatching
    . Any better ideas?
    k
    r
    +4
    • 7
    • 14
  • g

    George

    11/16/2022, 2:07 PM
    Hello folks, in case i have a function which checks for a precondition based on authorization access should i postfix it with
    orThrow
    or it's ok to omit it? For example:
    private val CspAccount.retrieveAuthenticatedDevice: CspDevice
        get() = this.authenticatedDevice.getOrElse {
            throw WebApplicationException(
                "Authenticated device for account: ${this.number} was not found",
                Response.Status.UNAUTHORIZED
            )
        }
    It would be better if i renamed it to getAutheticatedDeviceOrThrow()? Thanks in advance for any answers !
    m
    s
    +2
    • 5
    • 6
  • c

    czuckie

    11/28/2022, 11:39 AM
    if you guys were to have a module for cough utility methods (extensions and what not), what would you call it? I'm really trying to avoid calling it a utility module because I feel like that would be like opening a dumping ground. I'm on the fence with
    language-support
    as in adding things the language doesn't offer but perhaps could.
    j
    e
    • 3
    • 6
  • s

    Sam Stone

    12/09/2022, 4:49 AM
    Made this function, but I feel like the name (and possibly the signature) can be improved. I use this alot (e.g.
    foos.find { it.id == id }
    ) so this is nice sugar for me (used like
    foos.findBy(id) { it.id }
    ):
    inline fun <T, R> Iterable<T>.findBy(key: R, selector: (T) -> R): T? = find { selector(it) == key }
    Maybe rename to just
    find
    ?
    findIn
    ?
    j
    • 2
    • 1
  • v

    Vitor Hugo Schwaab

    01/14/2023, 12:21 AM
    Naming is HARD https://twitter.com/depthsofwiki/status/1614045362985082881?s=20&amp;t=DLVlqH70jPPCM26_QyXEHA
  • s

    Sam

    01/20/2023, 11:42 AM
    What’s the right name for this function? It’s like
    fold
    , but the
    operation
    is allowed to return
    null
    , in which case the whole thing exits early with a
    null
    return value.
    private inline fun <T, R> Iterable<T>.fold2(initial: R, operation: (acc: R, T) -> R?): R? =
        fold<T, R?>(initial) { acc, element -> operation(acc ?: return null, element) }
  • s

    Stylianos Gakis

    02/03/2023, 6:42 PM
    We’ve recently cleaned up our authentication token logic and now got a centralized place (let’s call this AuthenticationService) where we know we’re here logging in, hence storing a token and refresh token, and a logout method which clears these tokens. In our “log out” case, we got a log out usecase, which basically goes ahead and manually clears some caches and stuff, and then finalizes by calling this log out function which finally clears the tokens. We call that log out function manually when the user simply clicks on a button. Now here comes the situation, where we also want to perform this log out logic when they are logged out through other means, like the tokens expire and so on. So I was thinking maybe this is a place to invert how this works, and instead of the log out usecase doing everything and then clears the tokens, it should instead call this AuthenticationService, which will clear the token and then after it’s done it should trigger an event of “Hey I am now logged out”. The idea is that then, other modules who don’t need to to know too much about these modules, just need to be aware of some interface which may be named like
    interface AuthenticationListener {
      suspend fun loggedIn()
      suspend fun loggedOut()
    }
    This will be in a common module without more dependencies, and whichever module is interested can provide implementations of this interface to do stuff that it may need to do on login or logout. Then there should be some class which is called ??? Let’s just say
    AuthenticationEventDispatcher
    for now
    class AuthenticationEventDispatcher(
      authenticationListeners: Set<AuthenticationListener>, // injected
      applicationScope: ApplicationScope,
      coroutineContext: CoroutineContext,
    ) {
      private val authEvents = Channel<AuthenticationEvent>(Channel.UNLIMITED)
      init {
        applicationScope.launch(coroutineContext) {
          authEvents.consumeAsFlow()
            .collect { event ->
              authenticationListeners.map { authenticationListener ->
                async { when (event) { LOGGED_IN -> authenticationListener.loggedIn(); LOGGED_OUT -> authenticationListener.loggedOut() } } 
              }.awaitAll()
            }
        }
      }
      fun loggedIn() { authEvents.trySend(LOGGED_IN) }
      fun loggedOut() { authEvents.trySend(LOGGED_OUT) }
      private enum class AuthenticationEvent { LOGGED_IN, LOGGED_OUT }
    }
    Which should just take these events and inform all the AuthenticationListener instances to do whatever it is that they’re gonna do (One example is that I want to get a member ID when logging in from the backend and save it, but this only works after having logged in first) So with all this context, how would you better name “AuthenticationEventDispatcher” or even the “AuthenticationListener” which I am also not happy about?
    e
    • 2
    • 3
  • p

    Peter Mandeljc

    02/07/2023, 10:23 AM
    Any opinion on prefixing
    Flow<Boolean>
    with "is". E.g.
    val isVisible: Flow<Boolean>
    ?
    s
    e
    +3
    • 6
    • 46
  • t

    thanh

    02/14/2023, 12:47 PM
    what is the best (or just shorter) name for this
    fun Set<A>nonEmptyIntersection(other: Set<A>) = this.intersect(other).nonEmty()
    ?
    l
    e
    r
    • 4
    • 6
  • p

    pardom

    02/21/2023, 8:40 PM
    Hey, all. What are your naming conventions for suspending variations of non-suspending functions? •
    doThing()
    ◦
    doThingAsync()
    ◦
    doThingSuspending()
    ◦
    doThingSuspended()
    ◦ etc?
    e
    • 2
    • 8
  • m

    mbonnin

    02/27/2023, 4:51 PM
    Small thing that is itching me. It's
    JSON
    and not
    Json
    , right? I've been using
    Json
    everywhere but I think I'm wrong?
    s
    c
    l
    • 4
    • 9
  • k

    Kshitij Patil

    03/11/2023, 1:54 PM
    What should be the name for a class which builds something but is not really implementing
    Builder
    pattern. You simply have one method
    Foo.build(param)
    in the class interface which gives you the instance. Such classes use some other builder hierarchy by feeding received configurations in
    param
    and gives you concrete instance, IE, abstracting away builder logic. For instance, I have a custom notification builder class which is using
    NotificationCompat.Builder()
    internally and giving
    Notification
    instance on invocation.
    m
    j
    +4
    • 7
    • 8
Powered by Linen
Title
k

Kshitij Patil

03/11/2023, 1:54 PM
What should be the name for a class which builds something but is not really implementing
Builder
pattern. You simply have one method
Foo.build(param)
in the class interface which gives you the instance. Such classes use some other builder hierarchy by feeding received configurations in
param
and gives you concrete instance, IE, abstracting away builder logic. For instance, I have a custom notification builder class which is using
NotificationCompat.Builder()
internally and giving
Notification
instance on invocation.
m

mbonnin

03/11/2023, 2:07 PM
You could top level builder functions:
buildMyNotification {
  title = "Hello World"
  timeout = 10.seconds
}
or
MyNotification(
  params = NotificationParams(
    title = "Hello World"
    timeout = 10.secons
  )
)
j

Javier

03/11/2023, 2:23 PM
operator fun invoke
on the
interface
is another option
interface Foo {
  
    companion object {

         operator fun invoke(param: FooParam) = object : Foo {
             ...
         }
    }
}

// Consumer
fun main() {
  val foo = Foo(param = FooParam(...))
}
k

Kshitij Patil

03/12/2023, 6:40 AM
This can’t be a function. I want to have multiple subclasses implementing this. Like there will be Alarm Notification Builder, Sticky Notification Builder and I want to have proper DI setup for all of these. The concern is not how to implement it, but what to name this class. Let’s say it’s building
Notification
object, I don’t really want to name it
MyNotificationBuilder
, because I’m not implementing builder pattern and the name might give wrong ideas. Some of the options I came up with • MyNotificationCreator • MyNotificationComposer • MyNotificationFactory (to some extent we can call it a factory because I’ll be having multiple subclasses creating their own variant of
Notification
)
k

kqr

03/12/2023, 6:26 PM
Factory?
d

Dmitry Khalanskiy [JB]

03/12/2023, 9:36 PM
I still don't get why it can't be a function. There can be multiple functions of the same type.
l

louiscad

03/13/2023, 2:44 PM
Are you working on something that looks like this?
m

Marcello Galhardo

03/19/2023, 1:19 AM
From your first message I would say you are describing an oldie but goodie Factory - so that is the name I would go for. That said, your second message made me suspect you may be trying to implement a variation of Abstract Factory (?). Maybe you want to check this: https://refactoring.guru/design-patterns/abstract-factory
View count: 4