Data update

Task/Queue-Usage/PowerShell/queue-usage-1.ps1

@@ -0,0 +1,26 @@
+[System.Collections.ArrayList]$queue = @()
+# isEmpty?
+if ($queue.Count -eq 0) {
+    "isEmpty? result : the queue is empty"
+} else {
+    "isEmpty? result : the queue is not empty"
+}
+"the queue contains : $queue"
+$queue += 1                    # push
+"push result : $queue"
+$queue += 2                    # push
+$queue += 3                    # push
+"push result : $queue"
+
+$queue.RemoveAt(0)             # pop
+"pop result : $queue"
+
+$queue.RemoveAt(0)             # pop
+"pop result : $queue"
+
+if ($queue.Count -eq 0) {
+    "isEmpty? result : the queue is empty"
+} else {
+    "isEmpty? result : the queue is not empty"
+}
+"the queue contains : $queue"