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generate a random euromillions play / published by https://github.com/dacr/code-examples-manager #182068a4-970a-4ca0-bccb-f41fa2d44d31/e44d5a6796daced68362346b8f813b00c8fd7991
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| // summary : generate a random euromillions play | |
| // keywords : scala, euromillions, random, rng, fdj, @testable | |
| // publish : gist | |
| // authors : David Crosson | |
| // license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2) | |
| // id : 182068a4-970a-4ca0-bccb-f41fa2d44d31 | |
| // created-on : 2021-02-10T21:45:49Z | |
| // managed-by : https://github.com/dacr/code-examples-manager | |
| // run-with : scala-cli $file | |
| // --------------------- | |
| //> using scala "3.6.4" | |
| // --------------------- | |
| def gen(limit:Int):Int = scala.util.Random.nextInt(limit)+1 | |
| def select(limit:Int,count:Int):List[Int]= { | |
| LazyList | |
| .continually(gen(limit)) | |
| .scanLeft(Set.empty[Int]) ( (selected, randomlyChosen) => selected+randomlyChosen) | |
| .find(_.size == count) | |
| .get | |
| .toList | |
| .sorted | |
| } | |
| println("nums : " + select(50,5).mkString(" - ")) | |
| println("stars : " + select(12,2).mkString(" - ")) |
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