is there a `Map<K, V>.putAllWith(other: Map<K, V>, remappingFunction: (V, V) -> V): M...

# announcements

[Leon K]

is there a Map<K, V>.putAllWith(other: Map<K, V>, remappingFunction: (V, V) -> V): Map<K,V> equivalent?

[elizarov]

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/map-values-to.html

[Dominaezzz]

With Map is mutable? Nvm.

[Leon K]

yes, with map mutable. That seems to be what I'm looking for, thanks!

[Leon K]

or no, it actually isn't. what i'm looking for is this:

/** merge another map into this map,
 * applying the given remapping function too the two values if there is a key-conflict. */
fun <K, V> MutableMap<K, V>.putAllWith(other: Map<K, V>, remappingFn: (V, V) -> V) = other.forEach { (k, v) ->
    merge(k, v, remappingFn)
}

[Dominaezzz]

I don't think that can be done with a single function.

[Leon K]

I guess I'll propose this in the stdlib channel then, i've needed it several times and it seems like a good addition!