Hi! Anybody know what i should replace this with? Or how to add default value = 0

var harvest : HashMap<String,Int> = HashMap()
harvest[plant.name] += amount

See if

compute()

isnt what you need

triple backticks on multi lines

Or perhaps a MutableMap declared with https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/with-default.html?

exactly.

val harvest = mutableMapOf<String, Int>().withDefault { 0 }
// getValue is necessary to use the default set above:
harvest[plant.name] = harvest.getValue(plant.name) + amount

Thank you!

There is also

getOrElse

which I personally prefer to

withDefault

if there is only one place that retrieves values.