For now I did a simple: ``` inline fun <K, V&g...

# stdlib

[dimsuz]

For now I did a simple:

inline fun <K, V> MutableMap<K,V>.replaceOrPut(key: K, updateOp: (V?) -> V): MutableMap<K, V> {
  val current = this[key]
  this[key] = updateOp(current)
  return this
}

[Nir]

Is there any chance of getting something like this in the standard library?

Context:

inline fun <K, V> MutableMap<K,V>.replaceOrPut(key: K, updateOp: (V?) -> V): MutableMap<K, V> {
  val current = this[key]
  this[key] = updateOp(current)
  return this
}

I prefer to call this function update personally but the idea is the same. It's very useful. Without this I've found it's rather awkward to do certain things in Kotlin; updating for example integers in MutableMap<*, Int> is annoying, you can't even do m["hello"] += 1

This is quite similar to Java hashmaps compute function: https://www.geeksforgeeks.org/hashmap-compute-method-in-java-with-examples/ which is absent in Kotlin's stdlib. Note that Python and C++ to take two examples, allow compound arithmetic on their mutable Maps, so this is fairly awkward relative to quite a number of existing mainstream languages