init

lib/util.lua

@@ -0,0 +1,17 @@
+local Util = {}
+
+function Util.indexOf(haystack, needle)
+	for b,blade in pairs(haystack) do
+		if blade == needle then return b end
+	end
+end
+
+function Util.getNext(stack, item, d)
+	local w = Util.indexOf(stack, item)
+	if not w then return nil end
+	local i = (((w-1) + d) % #stack) + 1
+	return stack[i]
+end
+
+return Util
+