Initial data commit

Task/Sorting-algorithms-Permutation-sort/Sidef/sorting-algorithms-permutation-sort.sidef

@@ -0,0 +1,22 @@
+func psort(x, d=x.end) {
+
+    if (d.is_zero) {
+        for i in (1 .. x.end) {
+            (x[i] < x[i-1]) && return false;
+        }
+        return true;
+    }
+
+    (d+1).times {
+        x.prepend(x.splice(d, 1)...);
+        x[d] < x[d-1] && next;
+        psort(x, d-1) && return true;
+    }
+
+    return false;
+}
+
+var a = 10.of { 100.irand };
+say "Before:\t#{a}";
+psort(a);
+say "After:\t#{a}";