From 0bbb74b7b0d8130cfcb71aedd7971e2906362a08 Mon Sep 17 00:00:00 2001
From: Ben Sima <ben@bsima.me>
Date: Tue, 12 May 2020 12:32:57 -0700
Subject: for -> turn

Inspired by hoon
---
 Alpha/Core.scm |  2 +-
 Biz/Serval.scm |  7 +------
 z.scm          | 24 ++++++++++--------------
 3 files changed, 12 insertions(+), 21 deletions(-)

diff --git a/Alpha/Core.scm b/Alpha/Core.scm
index db5975b..0ef1098 100644
--- a/Alpha/Core.scm
+++ b/Alpha/Core.scm
@@ -206,7 +206,7 @@
 (define (contains? ls x)
   (member? x ls))
 
-(define (for ls f)
+(define (turn ls f)
   (map f ls))
 
 (define (seq x)
diff --git a/Biz/Serval.scm b/Biz/Serval.scm
index 1ccab41..2ea89c2 100644
--- a/Biz/Serval.scm
+++ b/Biz/Serval.scm
@@ -86,11 +86,6 @@
   ;; should this kit start when the host starts?
   (auto-start get-auto-start set-auto-start!))
 
-(define-syntax for
-  (syntax-rules ()
-    ((_ a b) (map b a))
-    ((_ a ... b) (map b a ...))))
-
 (define (zip a b)
   "Combine a and b into a single list of pairs."
   ;; TODO: zip-list, zip-with, in Core
@@ -99,7 +94,7 @@
 (define (serialize kit)
   "Turns a kit into an association list."
   (let* ((fields (record-type-fields @Kit))
-         (values (for fields
+         (values (turn fields
                    (lambda (field) ((record-accessor @Kit field) kit)))))
     (zip fields values)))
 
diff --git a/z.scm b/z.scm
index e379066..46e6fcf 100644
--- a/z.scm
+++ b/z.scm
@@ -155,7 +155,7 @@
 (define (index-node id)
   (let ([node (load-node id)])
     (dict.set *titles* (title node) id)
-    (for (tags node)
+    (turn (tags node)
       (/. tag
           (if tag
               (dict.update
@@ -177,14 +177,6 @@
 (define (get-by-title title)
   (dict.get *titles* title))
 
- ;; Printing
-
-(define (print-titles)
-  (for (list-nodes)
-    (lambda (id)
-      (pr id) (pr ": ")
-      (prn (title (load-node id))))))
-
  ;; webserver
 
 (define *css* "body{max-width:650px;margin:40px auto;padding:0 10px;font:18px/1.5 -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, \"Noto Sans\", sans-serif, \"Apple Color Emoji\", \"Segoe UI Emoji\", \"Segoe UI Symbol\", \"Noto Color Emoji\";color:#444}h1,h2,h3{line-height:1.2}@media (prefers-color-scheme: dark){body{color:white;background:#444}a:link{color:#5bf}a:visited{color:#ccf}}")
@@ -240,7 +232,7 @@
     ['()
      (respond
       `((ul
-         ,@(for (list-nodes)
+         ,@(turn (list-nodes)
              (lambda (id)
                `(li (a (@ (href ,(fmt "/node/~a" id)))
                        ,(fmt "~a: ~a"
@@ -254,14 +246,14 @@
      (let ((tags (dict.keys *tags*)))
        (reindex)
        (respond
-        `((ul ,@(for tags
+        `((ul ,@(turn tags
                   (lambda [tag]
                     `(li (a (@ (href ,(fmt "/tag/~a" tag)))
                             ,(fmt "~a" tag)))))))))]
     [("tag" tag)
      (let ([ids (tagged tag)])
        (respond
-        `((ul ,@(for ids
+        `((ul ,@(turn ids
                   (lambda [id]
                     `(li (a (@ (href ,(fmt "/node/~a" id)))
                             ,(fmt "~a: ~a"
@@ -292,11 +284,15 @@ where 'command' is:
            [editor (os.getenv "EDITOR")])
        (subprocess.call (list editor (path node)))
        (exit EXIT_SUCCESS))]
-    [("ls") (print-titles)]
+    [("ls")
+     (turn (list-nodes)
+       (lambda (id)
+         (pr id) (pr ": ")
+         (prn (title (load-node id)))))]
     [("tagged" tag)
      (begin
        (reindex)
-       (for (tagged tag)
+       (turn (tagged tag)
          (lambda (id)
            (pr id)
            (pr ": ")
-- 
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