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.