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# rx
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praful0203
05/29/2020, 6:45 AMHow 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
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bezrukov
05/29/2020, 7:37 AM Copy code
val first = Single.just(1)
val second = Single.just(2)
Singles.zip(first, second) { f, s -> f + s }or using Single.zip:
Copy code
val first = Single.just(1)
val second = Single.just(2)
Single.zip(first, second, BiFunction { f, s -> f + s })a
arekolek
05/29/2020, 8:08 AMAlso this will work with new type inference:
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val first = Single.just(1)
val second = Single.just(2)
Single.zip(first, second) { f, s -> f + s }u
ursus
05/29/2020, 5:37 PMuse rxkotlin, it has sugar for this
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praful0203
05/30/2020, 5:53 PMThanks for the solutions! But I am not able to figure out the last parameter which I was trying with Singles.zip()
in RxKotlin
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ursus
05/31/2020, 1:27 AMthe rxkotlin classes are usually plural, so for example
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Singles.zip(Single.just(""), Single.just("")) { a, b -> a + b}a
arekolek
06/01/2020, 9:15 AMuse rxkotlin, it has sugar for this@ursus https://kotlinlang.slack.com/archives/C0B8Y8BHC/p1590737836124300?thread_ts=1590734739.124200&cid=C0B8Y8BHC
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ursus
06/01/2020, 11:32 AMlol, sry
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