From 6671e036b8a4a96c30f021a5bf9a824b6b28d33b Mon Sep 17 00:00:00 2001
From: Jeff Bezanson <jeff.bezanson@gmail.com>
Date: Tue, 4 Dec 2012 18:26:14 -0500
Subject: [PATCH] add unique(). fixes #1645

---
 base/export.jl | 1 +
 base/set.jl    | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/base/export.jl b/base/export.jl
index f20ffd698f2a4..36cfb919e9224 100644
--- a/base/export.jl
+++ b/base/export.jl
@@ -767,6 +767,7 @@ export
     toggle_each,
     union,
     union!,
+    unique,
     values,
     valtype,
     xor!,
diff --git a/base/set.jl b/base/set.jl
index 098b3a127e847..0f793dec392bc 100644
--- a/base/set.jl
+++ b/base/set.jl
@@ -82,3 +82,5 @@ end
 -(a::Set, b::Set) = setdiff(a,b)
 
 isequal(l::Set, r::Set) = length(l) == length(r) == length(intersect(l,r))
+
+unique(C) = elements(add_each(Set{eltype(C)}(), C))