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CodingBat code practice

 

queueHead7


Ensure the queue's head is 7.


queueHead7([1, 4, 9]) → [7, 1, 4, 9]
queueHead7([3, 4, 7, 9]) → [7, 3, 4, 7, 9]
queueHead7([]) → [7]

...Save, Compile, Run (ctrl-enter)

public ArrayList<Integer> queueHead7(ArrayList<Integer> list) { }

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