1 files changed, 15 insertions, 19 deletions
diff --git a/scheme/utils.scm b/scheme/utils.scm
index 6ba98cd..d17f20c 100644
--- a/scheme/utils.scm
+++ b/scheme/utils.scm
@@ -1,22 +1,18 @@
-(define fold
-  (lambda (f acc xs)
-    (if (null? xs)
-      acc
-      (fold f (f acc (car xs)) (cdr xs)))))
+(define (fold f acc xs)
+  (if (null? xs)
+    acc
+    (fold f (f acc (car xs)) (cdr xs))))
 
-(define sum
-  (lambda (xs) (fold + 0 xs)))
+(define (sum xs) (fold + 0 xs))
 
-(define range
-  (lambda (start stop step)
-    (if (>= start stop)
-      '()
-      (cons start (range (+ start step) stop step)))))
+(define (range start stop step)
+  (if (>= start stop)
+    '()
+    (cons start (range (+ start step) stop step))))
 
-(define filter
-  (lambda (predicate xs)
-    (if (null? xs)
-      '()
-      (let* ((x (car xs))
-             (filtered (filter predicate (cdr xs))))
-        (if (predicate x) (cons x filtered) filtered)))))
+(define (filter predicate xs)
+  (if (null? xs)
+    '()
+    (let* ((x (car xs))
+           (filtered (filter predicate (cdr xs))))
+      (if (predicate x) (cons x filtered) filtered))))