September 2017 Update

Task/Queue-Usage/Elena/queue-usage.elena

@@ -1,25 +1,24 @@
-#import system.
-#import system'collections.
-#import extensions.
+import system'collections.
+import extensions.
 
-#symbol program =
+program =
 [
     // Create a queue and "push" items into it
-    #var queue := Queue new.
+    var queue := Queue new.
 
     queue push:1.
     queue push:3.
     queue push:5.
 
     // "Pop" items from the queue in FIFO order
-    console writeLine:(queue pop). // 1
-    console writeLine:(queue pop). // 3
-    console writeLine:(queue pop). // 5
+    console printLine(queue pop). // 1
+    console printLine(queue pop). // 3
+    console printLine(queue pop). // 5
 
     // To tell if the queue is empty, we check the count
-    console writeLine:"queue is ":((queue length == 0) iif:"empty":"nonempty").
+    console printLine("queue is ",(queue length == 0) iif("empty","nonempty")).
 
     // If we try to pop from an empty queue, an exception
     // is thrown.
-    queue pop | if &Error: e [ console writeLine:"Queue empty.". ].
+    queue pop | if(:e)[ console writeLine:"Queue empty.". ].
 ].