Remove single-element permutations

2019-11-06 06:22:10 +01:00 · 2019-11-06 06:22:10 +01:00 · 12572889a1
commit 12572889a1
parent ade18b5ccf
1 changed files with 2 additions and 1 deletions
--- a/src/dev/w1zzrd/math/Permutation.kt
+++ b/src/dev/w1zzrd/math/Permutation.kt
@ -22,6 +22,7 @@ class Permutation {
     */
    operator fun times(perm: Permutation)
            = Permutation(this(*perm(*orderedElements)).zip(orderedElements)    // Generate transpositions
+        .filterNot{ it.first == it.second }
        .foldRight(ArrayList<Pair<Char, Char>>()){                              // Deduplicate transpositions
                insert, acc ->
            acc.firstOrNull {