How do I use Singles.zip()? I had a Single.zip() in RxJava and when I converted it to Kotlin and tri...

# rx

[praful0203]

How do I use Singles.zip()? I had a Single.zip() in RxJava and when I converted it to Kotlin and tried to use same with RxKotlin it is showing error for BiFunction

[bezrukov]

val first = Single.just(1)
val second = Single.just(2)
Singles.zip(first, second) { f, s -> f + s }

[bezrukov]

or using Single.zip:

val first = Single.just(1)
val second = Single.just(2)
Single.zip(first, second, BiFunction { f, s -> f + s })

[arekolek]

Also this will work with new type inference:

val first = Single.just(1)
val second = Single.just(2)
Single.zip(first, second) { f, s -> f + s }

https://stackoverflow.com/a/50617880/1916449

[ursus]

use rxkotlin, it has sugar for this

[praful0203]

Thanks for the solutions! But I am not able to figure out the last parameter which I was trying with Singles.zip()
in RxKotlin

[ursus]

the rxkotlin classes are usually plural, so for example

Singles.zip(Single.just(""), Single.just("")) { a, b -> a + b}

[arekolek]

use rxkotlin, it has sugar for this

@ursus https://kotlinlang.slack.com/archives/C0B8Y8BHC/p1590737836124300?thread_ts=1590734739.124200&cid=C0B8Y8BHC

[ursus]

lol, sry