Any issues with adding a `chunked` (or `chunkedBy...

# stdlib

[nkiesel]

Any issues with adding a chunked (or chunkedBy) which takes a predicate instead of an Int? Something like

fun <T> List<T>.chunkedBy(predicate: (T) -> Boolean): List<List<T>> =
    fold(mutableListOf(mutableListOf<T>())) { acc, item ->
        if (predicate(item)) {
            acc.add(mutableListOf())
        } else {
            acc.last().add(item)
        }
        acc
    }

[marcinmoskala]

Are there any use-cases for that? It seems redundant and limiting to me.

[nkiesel]

I regularly use it when converting a list of items into a grouped list. Example: List<String>, with groups separated by empty lines. list.chunkedBy { it.isEmpty() } neatly expresses that. (and yes, mostly comes up in December every year during AoC).

[marcinmoskala]

Hmm, that does make sense