@karelpeeters I didn't know that, sounds like returning a Set<String> is the better solution

@Ruckus thanks for the snippet!

I have a

List<String>

like so: { "Hello", "ABC", "yo", "This is", "There are", "An App", "Hey", Help" } I have a

query : String = "Hl"

in Kotlin, how would I construct a filter such that the output is: { "Hello", Help" } If I have to implement the algorithm, what would be a good one? Or is the only way to do so is to loop through each char in the query string? Secondly, if the query is

query : String = "a"

, and let's say the output is { "ABC", "There are", "An App"} I would like to sort this list based on the first index of

query

, e.g: { "ABC", "An App", "There are"} How should I do so in Kotlin? My attempt:

val listOfFilteredString = listOfString
                .filter { s-> s.contains(query, ignoreCase = true) }
                .sortedWith(compareBy { s -> s.label.indexOf(query) })

It's not working 😕

Once things get this complicated it's often easier to let those fancy lambdas go and write a function for it.

Hi, I was playing around with reified generics in Kotlin. I tried to have a generic

get

function that wraps around a

getString

,

getInt

, methods. I wrote this https://try.kotlinlang.org/#/UserProjects/hcd4agpck875pl6a8ad31vg5vg/h83porfurr8cru60q1gv95kntm I'm not sure what is going on because this code seems to work fine for Kotlin v1.0.7 but not on v1.1.3. Anyone care to take a look?

related? https://youtrack.jetbrains.com/issue/KT-17879

Does anyone make Proguard works on a Kotlin project (Non Android)?

Guys anyone got an insight on this? https://stackoverflow.com/questions/45728304/how-to-revert-a-module-dependency-exclusion-in-intellij-after-code-inspection-f

Hm, anyone know the cleanest way of only performing some action if the return value of a function is not a default value (i.e. getInt() doesn't return 0)?

For nulls it's easy, i.e. I have arguments.getString()?.let { action() }

But I have arguments.getInt() now which returns a non-null Int, and returns a default value of 0 instead of null (since it's a java method)

There's also

takeIf

for the opposite case.

hm, unfortunately it looks like I can't do that if I need to reference the int in the let {} block

a better example I guess is that I want to do .let{ action(it) }

That does indeed work, no?

Otherwise there are

also

and

apply

.

I think takeIf returns a boolean, so when you call .let on it the type changes to that?

let

works for referencing

it

takeIf

returns the object in case the condition was met, null otherwise

from the source

public inline fun <T> T.takeIf(predicate: (T) -> Boolean): T? = if (predicate(this)) this else null

note that the return type is

T?

@User uploaded a file: Untitled

that's what I have right now, and it's saying that the second "it" is the wrong type

well,

setText

receives a

String

Or a

@StringRes int

It also takes in an integer

This works fine

oooh

Oh I see, it's complaining that the type is Int?, not Int