Naive `Iterable<T>.chunkedBy` implemention to Kotlin

chunkedBy.kt

inline fun <T> Iterable<T>.chunkedBy(
    predicate: (T) -> Boolean
): List<List<T>> {
    val iterator = this.iterator()
    if (!iterator.hasNext()) {
        return emptyList()
    }
    
    var lastElem = iterator.next()
    var lastList = mutableListOf(lastElem)
    val acc = mutableListOf<MutableList<T>>(lastList)
    
    for(elem in iterator) {
        if (predicate(lastElem) == predicate(elem)) {
            lastList.add(elem)
        } else {
            lastList = mutableListOf(elem)
            acc.add(lastList)
        }
        lastElem = elem
    }
    
    return acc.map{it.toList()}.toList()
}

fun main() {
    val a = listOf(1, 2, 2, 3, 3, 5, 5, 6)
    
    print(a.chunkedBy{it % 2 == 0})
    // [[1], [2, 2], [3, 3, 5, 5], [6]]
}