intrinsics rewritten without ++, --, etc

fd.cm

@@ -12,11 +12,11 @@ function last_pos(str, sep) {
 
 // Helper to join paths
 function join_paths(base, rel) {
-  base = replace(base, /\/+$/, "")
-  rel = replace(rel, /^\/+/, "")
-  if (!base) return rel
-  if (!rel) return base
-  return base + "/" + rel
+  var b = replace(base, /\/+$/, "")
+  var r = replace(rel, /^\/+/, "")
+  if (!b) return r
+  if (!r) return b
+  return b + "/" + r
 }
 
 fd.join_paths = join_paths
@@ -39,7 +39,8 @@ fd.stem = function stem(path) {
 }
 
 fd.globfs = function(globs, dir) {
-  if (dir == null) dir = "."
+  var _dir = dir
+  if (_dir == null) _dir = "."
   var results = []
   
   function check_neg(path) {
@@ -88,9 +89,9 @@ fd.globfs = function(globs, dir) {
     });
   }
   
-  var st = fd.stat(dir)
+  var st = fd.stat(_dir)
   if (st && st.isDirectory) {
-    visit(dir, "")
+    visit(_dir, "")
   }
   
   return results