tasks a-s

Task/Queue-Definition/Groovy/queue-definition-2.groovy

@@ -0,0 +1,27 @@
+def q = new Queue()
+assert q.empty
+
+['Crosby', 'Stills'].each { q.push(it) }
+assert !q.empty
+['Nash', 'Young'].each { q.enqueue(it) }
+println q
+assert !q.empty
+assert q.pop() == 'Crosby'
+println q
+assert !q.empty
+assert q.dequeue() == 'Stills'
+println q
+assert !q.empty
+assert q.pop() == 'Nash'
+println q
+assert !q.empty
+q.push('Crazy Horse')
+println q
+assert q.dequeue() == 'Young'
+println q
+assert !q.empty
+assert q.pop() == 'Crazy Horse'
+println q
+assert q.empty
+try { q.pop() } catch (NoSuchElementException e) { println e }
+try { q.dequeue() } catch (NoSuchElementException e) { println e }