arrow-fx-stm/arrow.fx.stm/STM/removeAll

removeAll

open fun <A> TQueue<A>.removeAll(pred: (A) -> Boolean)(source)

Filter a TQueue, removing all elements for which pred returns false.

import arrow.fx.stm.TQueue
import arrow.fx.stm.atomically

suspend fun main() {
  //sampleStart
  val tq = TQueue.new<Int>()
  atomically {
    tq.write(0)
    tq.removeAll { it != 0 }
  }
  //sampleEnd
  println("Items in queue ${atomically { tq.flush() }}")
}

This function never retries.

This function has to access both TVar's and thus may lead to increased contention, use sparingly.