Slight tweak to the mapconcat function

kaushalmodi · Oct 11, 2018 · 57a0bdf · 57a0bdf
1 parent 8504af1
commit 57a0bdf
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/config.nims b/config.nims
@@ -17,11 +17,13 @@ const
 # https://github.com/kaushalmodi/nimy_lisp
 proc dollar[T](s: T): string =
   result = $s
-proc mapconcat[T](s: openArray[T]; op: proc(x: T): string = dollar; sep = " "): string =
+proc mapconcat[T](s: openArray[T]; sep = " "; op: proc(x: T): string = dollar): string =
   ## Concatenate elements of ``s`` after applying ``op`` to each element.
   ## Separate each element using ``sep``.
-  for x in s:
-    result.add op(x) & sep
+  for i, x in s:
+    result.add(op(x))
+    if i < s.len-1:
+      result.add(sep)
 
 task installPcre, "Installs PCRE using musl-gcc":
   if not existsFile(pcreLibFile):