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Given a 2-D int array, write an iterator that traverses it from left to right and top to bottom. The iterator has 2 methods - boolean hasNext() and int next(). The array can have rows of different sizes, so for e.g. 1, 2, 4, 5 5, 6 <null/empty>, 10, 40, 50 The 2D int array was represented as ArrayList<ArrayList<Integer>>().
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Software Engineer (Backend)

Interviewed at Airbnb

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Nov 18, 2015

Given a 2-D int array, write an iterator that traverses it from left to right and top to bottom. The iterator has 2 methods - boolean hasNext() and int next(). The array can have rows of different sizes, so for e.g. 1, 2, 4, 5 5, 6 <null/empty>, 10, 40, 50 The 2D int array was represented as ArrayList<ArrayList<Integer>>().

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