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simona1@sfusd.edu arraylist2 > firstHalfList
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Given an ArrayList of integers, return a new ArrayLIst that contains the first half of the elements. The resulting ArrayList should have a size of nums.size()/2


firstHalfList([1, 2, 1, 1]) → [1, 2]
firstHalfList([1, 2, 1]) → [1]
firstHalfList([1]) → []

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public ArrayList <Integer> firstHalfList(ArrayList <Integer> nums) { }

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