Data commit

Task/Permutations/PowerShell/permutations.psh

@@ -0,0 +1,26 @@
+function permutation ($array) {
+    function generate($n, $array, $A) {
+        if($n -eq 1) {
+            $array[$A] -join ' '
+        }
+        else{
+            for( $i = 0; $i -lt ($n - 1); $i += 1) {
+                generate ($n - 1) $array $A
+                if($n % 2 -eq 0){
+                    $i1, $i2 = $i, ($n-1)
+                    $A[$i1], $A[$i2] = $A[$i2], $A[$i1]
+                }
+                else{
+                    $i1, $i2 = 0, ($n-1)
+                    $A[$i1], $A[$i2] = $A[$i2], $A[$i1]
+                }
+            }
+            generate ($n - 1) $array $A
+        }
+    }
+    $n = $array.Count
+    if($n -gt 0) {
+        (generate $n $array (0..($n-1)))
+    } else {$array}
+}
+permutation @('A','B','C')