From: Alexis Laferrière <alexis.laf@xymus.net>
Date: Sun, 3 Apr 2011 15:57:20 +0000 (-0400)
Subject: lib: adds swap_at to arrays
X-Git-Tag: v0.5~33^2~4
X-Git-Url: http://nitlanguage.org

lib: adds swap_at to arrays

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
---

diff --git a/lib/standard/collection/array.nit b/lib/standard/collection/array.nit
index 8db629b..e8f7448 100644
--- a/lib/standard/collection/array.nit
+++ b/lib/standard/collection/array.nit
@@ -212,6 +212,13 @@ class AbstractArray[E]
 			_length = l - 1
 		end
 	end
+
+	fun swap_at( a : Int, b : Int )
+	do
+	    var e = self[a]
+	    self[a] = b
+	    self[b] = e
+	end
 end
 
 # Resizeable one dimention array of objects.