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gaurav.gupta@mq.edu.au arraylists > sum2D
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Define a function that when passed an ArrayList of ArrayList of Integer objects, returns the sum of all items in the list.


sum2D([[10, 70], [20, 90]]) → 190
sum2D([[10, 70, 20], [90]]) → 190
sum2D([[10, 70, 20, 90]]) → 190

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int sum2D(ArrayList<ArrayList<Integer>> list) { }

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