use switch

4chan_x.user.js

@@ -576,7 +576,16 @@
           return $.cache[pathname].abort();
         case '-':
           a.textContent = a.textContent.replace('-', '+');
-          num = g.BOARD === 'b' ? 3 : g.BOARD === 't' ? 1 : 5;
+          num = (function() {
+            switch (g.BOARD) {
+              case 'b':
+                return 3;
+              case 't':
+                return 1;
+              default:
+                return 5;
+            }
+          })();
           table = $.x("following::br[@clear][1]/preceding::table[" + num + "]", a);
           while ((prev = table.previousSibling) && (prev.nodeName === 'TABLE')) {
             $.rm(prev);

script.coffee

@@ -400,7 +400,10 @@ expandThread =
       when '-'
         a.textContent = a.textContent.replace '-', '+'
         #goddamit moot
-        num = if g.BOARD is 'b' then 3 else if g.BOARD is 't' then 1 else 5
+        num = switch g.BOARD
+          when 'b' then 3
+          when 't' then 1
+          else 5
         table = $.x "following::br[@clear][1]/preceding::table[#{num}]", a
         while (prev = table.previousSibling) and (prev.nodeName is 'TABLE')
           $.rm prev