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A Result type for Kotlin

There is a newer version: 2.0.0

package com.natpryce


fun  Iterable>.allValues(): Result, E> =
    Ok(map { r -> r.onError { return it } })

fun  Iterable>.anyValues(): List =
    filterIsInstance>().map { it.value }

fun  Iterable>.partition(): Pair, List> {
    val oks = mutableListOf()
    val errs = mutableListOf()
    forEach {
        when (it) {
            is Ok -> oks.add(it.value)
            is Err -> errs.add(it.reason)
        }
    }
    return Pair(oks, errs)
}