kotlinlang #getting-started

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getting-started

jonathan

02/15/2018, 9:53 PM

Is there any way to get the

kotlin2js

plugin using Gradle's plugins DSL? e.g.

plugins {
    id 'org.jetbrains.kotlin.js' version '1.2.21'  // (doesn't work)
}

or similar?

Martin Weigel

02/16/2018, 8:31 AM

Hi. I just can't seem to get Kotlin reflection working. I'm looking for a way to manipulate all String properties of an object. Is this possibble with Kotlin reflection?

oday

02/16/2018, 2:26 PM

for an actual block of code you use run

oday

02/16/2018, 3:01 PM

for example this would be completely unnecessary https://hastebin.com/qoyujaregu.cs

paulblessing

02/16/2018, 3:07 PM

I see a lot of new Kotlin programmers think that

?.let { ... } ?: ...

is exactly equivalent to

if (not null) ... else ...

but that's just not true in a general case.

➕ 1

rootandy

02/16/2018, 3:15 PM

i found a replacement for guard finally:

val notNullable = someNullable ?: return

jesjos

02/17/2018, 4:54 PM

Folks, I'm using kotlin with spring boot 2.0.0.RC1. I use the gradle and the no-arg constructor plugin and I apply the kotlin-jpa plugin but nevertheless I get the "No default constructor error". What could this be caused by?

wineluis

02/19/2018, 10:52 AM

ok nvm I have to do .toByte()

katien

02/20/2018, 6:14 AM

@dgngulcan, what do you mean? I don't think comments would work any differently than usual in that context but I have a feeling I'm not understanding your question

katien

02/20/2018, 6:22 AM

I just wasn't sure if there was some obvious clean solution I was unaware of

elf

02/20/2018, 10:22 AM

How to build a kotlin application using gradle

spand

02/20/2018, 12:41 PM

Is there an easy way to highlight or find out which object is being passed as the receiver in IDEA? In my usual cases I can easily have ten nested scopes

540grunkspin

02/20/2018, 1:02 PM

Callback hell?

oday

02/20/2018, 3:37 PM

do I place it before every filter operation on my results if they are like in the 100's?

katien

02/23/2018, 5:05 PM

They exist but I get the sense gradle is the way to go

katien

02/23/2018, 5:06 PM

greetings

👋 1

Jeremy Rempel

02/23/2018, 5:23 PM

what is the kotlin translation of : intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP)

Ishan Khare

02/25/2018, 11:32 AM

Hello, I'm trying to build my kotlin package with gradle. I've setup the build.gradle as follows

buildscript {
    ext.kotlin_version = '1.2.21'

    repositories {
	    jcenter()
    	mavenCentral()
    }

    dependencies {
	classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
	classpath "org.jetbrains.kotlin:kotlin-stdlib"
    }
}

plugins {
    id "org.jetbrains.kotlin.jvm" version "1.2.21"
}

sourceSets {
    main.kotlin.srcDirs += "./"
}

I'm getting errors related to

kotlin-stdlib

e: /home/ishan/code/kotlin-server/server/HttpRequest.kt: (8, 19): Unresolved reference: HashMap                                                                                                                       
e: /home/ishan/code/kotlin-server/server/HttpRequest.kt: (16, 38): Unresolved reference: split                                                                                                                        
e: /home/ishan/code/kotlin-server/server/HttpResponse.kt: (22, 31): Unresolved reference: toByteArray                                                                                                                 
e: /home/ishan/code/kotlin-server/server/HttpStatusCodes.kt: (3, 22): Unresolved reference: HashMap                                                                                                                   
e: /home/ishan/code/kotlin-server/server/HttpStatusCodes.kt: (3, 45): Unresolved reference: hashMapOf

oday

02/25/2018, 12:27 PM

will this work? https://pastebin.com/6wxHbABc

Codecriticon

02/26/2018, 8:54 AM

What are the best resources (books, websites, repos) to start learning Kotlin?

02/27/2018, 3:55 PM

what I would like to implement, for example, is to detect the host OS type and modify the build steps accordingly

Ruckus

02/28/2018, 4:34 AM

Because it's a Java method. It's one of the limitations of interop.

👍 1

wweofnowifmnwnkef

02/28/2018, 5:09 AM

What's the purpose of the Kotlin multiplatform jvm project in IntelliJ?

oday

03/01/2018, 6:25 PM

I am using Kotlin of course

oday

03/02/2018, 9:28 AM

hi, how do you suggest I go about sorting a list according to

created_at

where

created_at

is like

"Fri, 16 Feb 2018 10:24:59 GMT"

oday

03/02/2018, 9:35 AM

who’s eduardo

Tristan Caron

03/02/2018, 11:10 AM

Hello, is it possible by using kotlin's stdlib to apply

associateBy

on multiple level? Maybe not clear.. So I have something like

val list = listOf(listOf("value1", "value2", "value3"))

If I do use the method

associateBy

, I will get the fellowing output

println(list.associateBy { it[0] })
// {value1=[value1, value2, value3]}

And I would like something like:

{value1={value2=[value1, value2, value3]}}

Is it possible?

karelpeeters

03/02/2018, 11:15 AM

list.associateBy { it.first }.mapValues { k,v -> v.associateBy { it.second }}

Ishan Khare

03/02/2018, 5:29 PM

However if a create an escaped string directly like

var a = "\d+"

i get the correct output

\d+

(that i can further use to create a regex Patter) is this due to the way

String::replace

works? if so, isn't this a bug, why is it removing my escape sequences?

Rich Gabrielli

03/02/2018, 9:19 PM

Hi Everyone! Just started AS 3 and Kotlin last week. Coming over from iOS / Swift. Need to develop a few apps for work and we use Android tablets. So far I really like what I see. Any suggested Kotlin-centric websites you would suggest to keep abreast of?

Title

Rich Gabrielli

03/02/2018, 9:19 PM

dgngulcan

03/02/2018, 11:01 PM

Hi! I wish you a happy learning journey! I've made an open source app to keep up with android development articles, podcasts, etc. It's not kotlin focused but nowadays most of the content involves kotlin. You can check it out at Github: https://github.com/dgngulcan/droid-feed

Rich Gabrielli

03/02/2018, 11:19 PM

Thanks @dgngulcan! I will check it out as soon as I get an actual android device. I am currently only using emulators. I am still an iPhone user.

👍 1

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