From 9cabfbd1d09b41b7b78ebf57a42957ba87ff136f Mon Sep 17 00:00:00 2001
From: Bart Kroon <bart@tarmack.eu>
Date: Wed, 7 Sep 2011 22:22:05 +0200
Subject: [PATCH] Made list#unique about 5 times faster using filter().

---
 list.vim | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/list.vim b/list.vim
index 44d6b20..ee243d4 100644
--- a/list.vim
+++ b/list.vim
@@ -6,18 +6,9 @@
 " Remove duplicate values from {list} in-place (preserves order).
 
 function! xolox#misc#list#unique(list)
-  let index = 0
-  while index < len(a:list)
-    let value = a:list[index]
-    let match = index(a:list, value, index+1)
-    if match >= 0
-      call remove(a:list, match)
-    else
-      let index += 1
-    endif
-    unlet value
-  endwhile
-  return a:list
+  call reverse(a:list)
+  call filter(a:list, 'count(a:list, v:val) == 1')
+  return reverse(a:list)
 endfunction
 
 " Binary insertion (more efficient than calling sort() after each insertion).