From: Christopher Allan Webber <cwebber@dustycloud.org>
Date: Mon, 23 Jan 2017 22:23:35 +0000 (-0600)
Subject: Use simple comma-join when listing items in a room.
X-Git-Tag: fosdem-2017~90
X-Git-Url: https://jxself.org/git/?p=mudsync.git;a=commitdiff_plain;h=e01e22fd4d31717292d3ff169b6489f1d8967d86;ds=inline

Use simple comma-join when listing items in a room.
---

diff --git a/mudsync/room.scm b/mudsync/room.scm
index 8dc1d84..877e2fa 100644
--- a/mudsync/room.scm
+++ b/mudsync/room.scm
@@ -134,23 +134,6 @@
 
 ;;; look commands
 
-(define (list-words-as-string words)
-  "A little utility for listing a bunch of words in an English-style list"
-  ;; TODO: This could be made faster by traversing the O(n)
-  ;;   list once, not twice
-  (let ((word-length (length words)))
-    (cond 
-     ((eqv? word-length 0) "")
-     ((eqv? word-length 1) (car words))
-     (else
-      ;; TODO: and this is NOT efficient
-      (string-append
-       (string-join
-        (drop-right words 1)
-        ", ")
-       " and "
-       (last words))))))
-
 (define (room-player-looks-around room player-id)
   "Handle looking around the room"
   ;; Get the room text
@@ -180,7 +163,8 @@
     (if (eq? occupant-names-filtered '())
         #f
         (format #f "You see here: ~a.\n"
-                (list-words-as-string occupant-names-filtered))))
+                (string-join occupant-names-filtered
+                             ", "))))
 
   (define final-text
     (if occupant-names-string