diff -r c82a45f48bfc -r 5365ef60707e progs/while-arrays/compile_arrays.sc
--- a/progs/while-arrays/compile_arrays.sc	Fri Oct 13 23:49:34 2023 +0100
+++ b/progs/while-arrays/compile_arrays.sc	Sat Oct 21 09:09:09 2023 +0100
@@ -88,11 +88,12 @@
 // convenient string interpolations 
 // for generating instructions and labels
 
-implicit def sring_inters(sc: StringContext) = new {
+extension (sc: StringContext) {
     def i(args: Any*): String = "   " ++ sc.s(args:_*) ++ "\n"
     def l(args: Any*): String = sc.s(args:_*) ++ ":\n"
 }
 
+
 def compile_op(op: String) = op match {
   case "+" => i"iadd"
   case "-" => i"isub"
@@ -215,14 +216,8 @@
 
 // automating the above
 
-// pre-2.5.0 ammonite 
-// import ammonite.ops._
-
-// post 2.5.0 ammonite
 import os._
 
-
-
 def compile_to_file(bl: Block, class_name: String) : Unit = 
   write.over(pwd / s"$class_name.j", compile(bl, class_name))  
 
@@ -246,5 +241,4 @@
 
 
 
-// runs with amm2 and amm3