2 files changed, 13 insertions, 11 deletions
diff --git a/lib/functions.lisp b/lib/functions.lisp
index daeac0a..12b1df5 100644
--- a/lib/functions.lisp
+++ b/lib/functions.lisp
@@ -19,21 +19,21 @@
 
 (in-package :cantedraw.lib.functions)
 
-(fn range (start end &optional (step 1)) (-> (fixnum fixnum &optional fixnum) list)
-  "Make a list of numbers from START to END (exclusive).  If STEP is given, then
-each member is STEP distance apart."
+(fn range (&key (start 0) (end 0) (step 1))
+    (-> (&key (:start fixnum) (:end fixnum) (:step fixnum))
+        list)
+  "Return list of integers in interval [START, END).  If STEP is given, then
+each member is STEP distance apart i.e. {START + n * STEP | n from 0}.
+
+If END is not given, return interval [0, START)."
   (if (< end start)
       (error (format nil "~a < ~a" end start))
       (loop :for i :from start :to (1- end) :by step
             :collect i)))
 
-(fn take (n lst) (-> (fixnum sequence) sequence)
-  "Return the first N elements of LST."
-  (subseq lst 0 n))
-
 (fn split (n lst) (-> (fixnum sequence) (values sequence sequence))
   "Return CONS where CAR is the first N elements of LST and CDR is the rest."
-  (values (take n lst)
+  (values (subseq lst 0 n)
           (subseq lst n)))
 
 (fn rev-map (indicator lst &key (key-eq #'eq))
@@ -60,6 +60,3 @@ where key x in A has associations {y in LST : INDICATOR(y) = x}."
         :for item :in (coerce lst 'list)
         :if (not (member i indices))
           :collect item))
-
-(fn sort* (func lst) (-> (function sequence) sequence)
-  (sort lst func))
diff --git a/lib/macros.lisp b/lib/macros.lisp
index c60b867..2c4bdd8 100644
--- a/lib/macros.lisp
+++ b/lib/macros.lisp
@@ -124,3 +124,8 @@ sequentially via ->>"
 (defmacro alist-val (key alist)
   "Helper macro for getting the value of KEY in ALIST."
   `(cdr (assoc ,key ,alist)))
+
+(defmacro call-rev (func-name &rest arguments)
+  "Call a function with arguments but in reverse
+i.e. (call-rev f x1 x2 ... xn) => (f xn ... x2 x1)."
+  `(,func-name ,@(reverse arguments)))