RosettaCodeData/Task/Queue-Definition/NetRexx/queue-definition.netrexx

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/* NetRexx */
options replace format comments java crossref savelog symbols nobinary
mqueue = ArrayDeque()
viewQueue(mqueue)
a = "Fred"
mqueue.push('') /* Puts an empty line onto the queue */
mqueue.push(a 2) /* Puts "Fred 2" onto the queue */
viewQueue(mqueue)
a = "Toft"
mqueue.add(a 2) /* Enqueues "Toft 2" */
mqueue.add('') /* Enqueues an empty line behind the last */
viewQueue(mqueue)
loop q_ = 1 while mqueue.size > 0
parse mqueue.pop.toString line
say q_.right(3)':' line
end q_
viewQueue(mqueue)
return
method viewQueue(mqueue = Deque) private static
If mqueue.size = 0 then do
Say 'Queue is empty'
end
else do
Say 'There are' mqueue.size 'elements in the queue'
end
return