Folks, what tool can measure test coverage in Android app with Kotlin? Jacoco shows zeros. Is there any demo on github?

Does the current Kotlin 1.1 already have the Relaxed rules for sealed classes and data classes ?

yes

Then I have to try it out 😃

Does kotlin div method round up or down when dealing with non floating point values?

I thought it works like integer "%"

and "/"

like Int in any other language

it’s not a round. it’sa truncation.

Hi. New here. Yesterday I found an example of some code that I expected to compile but it didn't. https://discuss.kotlinlang.org/t/compiler-requires-help-with-smart-casting-and-sealed-classes/2073

Thought it could be interesting or perhaps a bug

@janvladimirmostert great article!

Thanks @avolkmann 😀

I must confess, I know its a really small thing, but I really like being able to use unicode values in signatures:

lowerBound = bound?.start ?: `-∞`
upperBound = bound?.endInclusive ?: `+∞`

with

val `+∞` = Double.POSITIVE_INFINITY`

(also intelliJ's monospace unicode font is better than slacks)

please don’t, we need less unicode sourcecode 😄

Is there a way to name a function including a backtick? Not that you should, I'm just curious.

There's no way, I think. IDEA says it's invalid identifier. By the way,

<

and

>

are allowed in IDEA's Rename dialog, but considered illegal characters by IDEA's code analysis. So, you can't name a method

<init>

or

<clinit>

😐

or anything with angle brackets, for that matter.

<foo

,

>

,

<><><>>>>

are all invalid

re: unicode - would be nice if you didn't even have to escape non-alphanumeric names. ofc this conflicts with operators though. but you could at least have

val ∞ = ...

actually seems to explain why swift has such complicated operator overloading... an operator is an identifier is an operator 🙂

Interesting, I wasn't aware

@damian Talking about swift, Id like to know how people are dealing with maintaining code from 2 years ago when they introduced the "feature" of emojis in variables

private fun doSomeAction() = {
        // Very important code here.
    }

private fun doSomeAction() {
        // Very important code here.
    }

Trick or treat 🙂 It’s hard to see an error here. In the first example it returns

() -> Unit

in the second just an

Unit

. Maybe it would be worth considering if the compiler/lint would warn us about the first scenario? Only on case when there is no assignment in the function usage.

Shouldnt it rather be the callsite that gets a warning of the

code has no effect

kind

I have been bitten by this multiple times.. though not because of this kind of function declaration

When I try to extend a sealed class outside of the class (M02) I get a warning that init is private

@spand I’ve heard that in Swift 3 it’s the default warning. It looks like a good idea.

Hi, can I hot swap some code in kotlin repl in Intellij Idea? Like adding some functions?