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CodingBat code practice

 

stackHead7b


Ensure the stack's head is 7. The stack may be empty.


stackHead7b([]) → [7]
stackHead7b([7]) → [7]
stackHead7b([3]) → [3, 7]

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

public ArrayList<Integer> stackHead7b(ArrayList<Integer> list) { }

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