scala list all permutations

Scala: List All Permutations

To list all permutations of a list in Scala, you can use the permutations method provided by the List class. Here's an example:

val myList = List(1, 2, 3)
val permutations = myList.permutations.toList

In this example, we have a list myList containing the elements 1, 2, and 3. We call the permutations method on myList to generate all possible permutations of the elements. The permutations method returns an iterator, so we convert it to a list using the toList method.

Now, the permutations variable will contain a list of lists, where each inner list represents a different permutation of the original list. For example, if myList is [1, 2, 3], the permutations list will be [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]].

Please note that the permutations method generates all possible permutations, so the number of permutations can grow exponentially with the size of the input list. It's important to consider the performance implications when working with large lists.