Null object: Difference between revisions

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@@ Line 99: / Line 99: @@
       DIM s{a%, b#, c$}
-      IF !^a() PRINT "a() is defined" ELSE PRINT "a() is not defined"
+      IF !^a() = 0 PRINT "a() is null" ELSE PRINT "a() is not null"
-      IF !^b() PRINT "b() is defined" ELSE PRINT "b() is not defined"
+      IF !^b() = 0 PRINT "b() is null" ELSE PRINT "b() is not null"
-      IF !^s{} PRINT "s{} is defined" ELSE PRINT "s{} is not defined"
+      IF !^s{} = 0 PRINT "s{} is null" ELSE PRINT "s{} is not null"
-      IF !^t{} PRINT "t{} is defined" ELSE PRINT "t{} is not defined"</lang>
+      IF !^t{} = 0 PRINT "t{} is null" ELSE PRINT "t{} is not null"</lang>
 '''Output:'''
 <pre>
-a() is defined
+a() is not null
-b() is not defined
+b() is null
-s{} is defined
+s{} is not null
-t{} is not defined
+t{} is null
 </pre>