Permutations: Difference between revisions

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@@ Line 9,322: / Line 9,322: @@
 =={{header|Sidef}}==
 ===Built-in===
-<syntaxhighlight lang="ruby">[0,1,2].permutations { |p|
+<syntaxhighlight lang="ruby">[0,1,2].permutations { |*a|
-    say p
+    say a
 }</syntaxhighlight>
@@ Line 9,331: / Line 9,331: @@
     loop {
-        callback([idx...])
+        callback(idx...)
         var p = n-1
@@ Line 9,347: / Line 9,347: @@
 }
-forperm({|p| say p }, 3)</syntaxhighlight>
+forperm({|*p| say p }, 3)</syntaxhighlight>
 ===Recursive===
 <syntaxhighlight lang="ruby">func permutations(callback, set, perm=[]) {
-    set.is_empty && callback(perm)
+    set || callback(perm)
     for i in ^set {
         __FUNC__(callback, [
-            set[(0 ..^ i)..., (i+1 ..^ set.len)...]
+            set[^i, i+1 ..^ set.len]
         ], [perm..., set[i]])
     }