diff --git a/src/util/swap.scad b/src/util/swap.scad
index 0ffd2833..1e3bca8c 100644
--- a/src/util/swap.scad
+++ b/src/util/swap.scad
@@ -5,9 +5,9 @@
 * @license https://opensource.org/licenses/lgpl-3.0.html
 *
 * @see https://openhome.cc/eGossip/OpenSCAD/lib3x-swap.html
-*
+* 
 **/ 
-
+ 
 function swap(lt, i, j) =
     i == j ? lt :
     let(
@@ -17,9 +17,8 @@ function swap(lt, i, j) =
 		b = ab[1]
 	) 
 	[
-		each [for(idx = 0; idx < a; idx = idx + 1) lt[idx]],
-		lt[b],
-		each [for(idx = a + 1; idx < b; idx = idx + 1) lt[idx]],
-		lt[a],
-		each [for(idx = b + 1; idx < leng; idx = idx + 1) lt[idx]]
+		for(i = [0:leng - 1])
+		if(i == a) lt[b] 
+		else if(i == b) lt[a]
+		else lt[i]
 	];
\ No newline at end of file