so use ` x as y = null` kotlinlang #getting-started

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getting-started

Title

c

ClaudiuB

01/17/2018, 7:06 PM

so use

x as? y != null

a

adam-mcneilly

01/17/2018, 7:08 PM

Are you interroping with Java at all? If you just use Kotlin,

is

can compare against nullable types.

val x: String? = null
    
    println(x is String) // false
    println(x is String?) // true

c

ClaudiuB

01/17/2018, 7:11 PM

Hmm thing is I don't have objects, I have an object and a type, but I'm working with

KClass<Any>

instances, which i can't use in both sides of the

is

operator

👍 1

Came up with this in case you'll need it 😄 Edit: That was wrong, better way

infix fun <T : Any> KClass<out Any>.instanceof(clazz: KClass<T>): Boolean {
    return try {
        this as T
        true
    } catch (e: ClassCastException) {
        false
    }
}

m

Max Russek

01/18/2018, 2:05 AM

Might as well make that reified

6 Views

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