afl-material: progs/pow.scala@37b126dbb0e7 (annotated)

964 d3e22099963d updated Christian Urban <christian.urban@kcl.ac.uk> parents: 882 diff changeset	1
365 9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	2	def concat(A: Set[String], B: Set[String]) : Set[String] =
564 638663141103 updated Christian Urban <urbanc@in.tum.de> parents: 525 diff changeset	3	for (x <- A ; y <- B) yield x ++ y
365 9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	4
9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	5	def pow(A: Set[String], n: Int) : Set[String] = n match {
9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	6	case 0 => Set("")
882 ccb28148bdf3 updated Christian Urban <christian.urban@kcl.ac.uk> parents: 801 diff changeset	7	case n => concat(A, pow(A, n - 1))
365 9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	8	}
9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	9
650 b34efa58f7d5 updated Christian Urban <urbanc@in.tum.de> parents: 638 diff changeset	10
b34efa58f7d5 updated Christian Urban <urbanc@in.tum.de> parents: 638 diff changeset	11
365 9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	12	val A = Set("a", "b", "c", "d")
9b71dead1219 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	13	val B = Set("a", "b", "c", "")
964 d3e22099963d updated Christian Urban <christian.urban@kcl.ac.uk> parents: 882 diff changeset	14	pow(A, 4).size
d3e22099963d updated Christian Urban <christian.urban@kcl.ac.uk> parents: 882 diff changeset	15	pow(B, 4).size
577 1d6043a87a3e updated Christian Urban <urbanc@in.tum.de> parents: 572 diff changeset	16
1d6043a87a3e updated Christian Urban <urbanc@in.tum.de> parents: 572 diff changeset	17

author	Christian Urban <christian.urban@kcl.ac.uk>
	Fri, 24 Oct 2025 10:52:05 +0100
changeset 1017	37b126dbb0e7
parent 964	d3e22099963d
permissions	-rw-r--r--