there are probably more primitive types that i am missing kotlinlang #getting-started

Channels

100daysofkotlin

100daysofkotlin-2021

algolialibraries

android-architecture

android-databinding

androidgithubprojects

androidx-xprocessing

arrow-contributors

beepiz-libraries

cincinnati-user-group

codemash-precompiler

codingconventions

competitive-programming

competitivecoding

compose-android

compose-desktop

compose-ui-showcase

connect-audit-events

cscenter-course-2016

domain-driven-design

effective-kotlin

effectivekotlin

embedded-kotlin

event21-community-content

fb-internal-demo

fluid-libraries

framework-elide

getting-started

github-workflows-kt

graviton-browser

image-processing

intellij-plugins

intellij-tricks

introduce-yourself

java-to-kotlin-refactoring

jhipster-kotlin

jvm-ir-backend-feedback

k2-early-adopters

kotest-contributors

kotlin-by-example

kotlin-data-storage

kotlin-foundation

kotlin-in-action

kotlin-multiplatform-contest

kotlin-pakistan

kotlinforbeginners

kotlingforbeginners

kotlinprogrammers

kotlintest-devs

kotlinultimatechallenge

kotlinx-datetime

lambdaworld_cadiz

language-evolution

language-proposals

leedskotlinusergroup

library-development

machinelearningbawas

myndocs-oauth2-server

navigation-architecture-component

ohio-kotlin-users

pattern-matching

pocketgitclient

practical-functional-programming

prozis-android-backup

python-contributors

realworldkotlin

refactoring-to-kotlin

refreshversions

russian-kotlinasfirst

skia-wasm-interop-temp

sofl-user-group

spring-security

squarelibraries

stayhungrystayfoolish

strife-discord-lib

swagger-gradle-codegen

swiss-user-group

tricity-kotlin-user-group

Title

s

Smallville7123

04/09/2019, 7:00 AM

there are probably more primitive types that i am missing

d

diesieben07

04/09/2019, 7:01 AM

String

is also not a primitive type.

Like was said before: what are you trying to accomplish here?

s

Smallville7123

04/09/2019, 7:04 AM

oh it isnt

well at least it initializes it to ""

k

karelpeeters

04/09/2019, 7:12 AM

You're also missing every possible type anyone ever declares without giving it a default no-args constructor, which is the real flaw with your approach.

s

Smallville7123

04/09/2019, 8:07 AM

such as if someone declares

class a(v : Int)

?

also how can i check if a type is nullable

as i just discovered i can explicitly set a non nullable type as null

fun <E> makeNull(v: AbstractList<E>) {
    v[0] = null
}

fun ret() {
    val ff = arrayListOf<Int>()
    ff.add(5)
    println("ff[0] = ${ff[0]}")
    makeNull(ff)
    println("ff[0] = ${ff[0]}")
    abort()
}

ff[0] = 5
ff[0] = null

d

diesieben07

04/09/2019, 8:18 AM

That code does not compile.

Unless you are using

java.util.AbstractList

. In that case: yes, java types are not null-safe.

https://kotlinlang.org/docs/reference/java-interop.html#null-safety-and-platform-types

s

Smallville7123

04/09/2019, 8:35 AM

ok, does kotlin have its own version of AbstractList?

k

karelpeeters

04/09/2019, 4:51 PM

You should never be using

AbstractList

(neither in Java nor in Kotlin), use the

List

or

MutableList

interface.

s

Smallville7123

04/09/2019, 11:43 PM

I'll try to use those instead

#getting-started Join Slack