YAPC::EU 2018 Glasgow Update!

Task/Stack/REBOL/stack.rebol

@@ -1,7 +1,5 @@
 REBOL [
 	Title: "Stack"
-	Author: oofoe
-	Date: 2010-10-04
 	URL: http://rosettacode.org/wiki/Stack
 ]
 

Task/Stack/Ring/stack.ring

@@ -0,0 +1,17 @@
+# Project : Stack
+
+load "stdlib.ring"
+ostack = new stack
+for n = 5 to 7
+     see "Push: " + n + nl
+     ostack.push(n)
+next
+see "Pop:" + ostack.pop() + nl
+see "Push: " + "8" + nl
+ostack.push(8)
+while len(ostack) > 0
+        see "Pop:" + ostack.pop() + nl
+end
+if len(ostack) = 0
+   see "Pop: stack is empty" + nl
+ok