From fc6a799fc68092998f352ef5689eed2b7f847e1b Mon Sep 17 00:00:00 2001
From: def <dennis@felsin9.de>
Date: Sat, 12 Jul 2014 03:04:43 +0200
Subject: Add random() for openarrays

---
 lib/pure/math.nim | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/pure/math.nim b/lib/pure/math.nim
index 2f7a696b9..78154cdad 100644
--- a/lib/pure/math.nim
+++ b/lib/pure/math.nim
@@ -279,8 +279,13 @@ proc `mod`*(x, y: float): float =
   result = if y == 0.0: x else: x - y * (x/y).floor
 
 proc random*[T](x: TSlice[T]): T =
+  ## For a slice `a .. b` returns a value in the range `a .. b-1`.
   result = random(x.b - x.a) + x.a
-  
+
+proc random[T](a: openarray[T]): T =
+  ## returns a random element from the openarray `a`.
+  result = a[random(a.low..a.len)]
+
 type
   TRunningStat* {.pure,final.} = object  ## an accumulator for statistical data
     n*: int                              ## number of pushed data
-- 
cgit 1.4.1-2-gfad0