1 files changed, 10 insertions, 17 deletions
diff --git a/lualibs-math.lua b/lualibs-math.lua
index fc8db47..43f60b5 100644
--- a/lualibs-math.lua
+++ b/lualibs-math.lua
@@ -9,33 +9,26 @@ if not modules then modules = { } end modules ['l-math'] = {
 local floor, sin, cos, tan = math.floor, math.sin, math.cos, math.tan
 
 if not math.round then
-    function math.round(x)
-        return floor(x + 0.5)
-    end
+    function math.round(x) return floor(x + 0.5) end
 end
 
 if not math.div then
-    function math.div(n,m)
-        return floor(n/m)
-    end
+    function math.div(n,m) return floor(n/m) end
 end
 
 if not math.mod then
-    function math.mod(n,m)
-        return n % m
-    end
+    function math.mod(n,m) return n % m end
 end
 
 local pipi = 2*math.pi/360
 
-function math.sind(d)
-    return sin(d*pipi)
+if not math.sind then
+    function math.sind(d) return sin(d*pipi) end
+    function math.cosd(d) return cos(d*pipi) end
+    function math.tand(d) return tan(d*pipi) end
 end
 
-function math.cosd(d)
-    return cos(d*pipi)
-end
-
-function math.tand(d)
-    return tan(d*pipi)
+if not math.odd then
+    function math.odd (n) return n % 2 ~= 0 end
+    function math.even(n) return n % 2 == 0 end
 end