Created
April 13, 2021 10:32
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Flatten Nest list iterator (Java)
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public class NestedIterator implements Iterator<Integer> { | |
Queue<Integer> data = new LinkedList<>(); | |
public NestedIterator(List<NestedInteger> nestedList) { | |
flatten(nestedList); | |
} | |
public void flatten(List<NestedInteger> list) { | |
for (NestedInteger el : list) | |
if (el.isInteger()) data.add(el.getInteger()); | |
else flatten(el.getList()); | |
} | |
public Integer next() { return data.poll(); } | |
public boolean hasNext() { return data.size() > 0; } | |
} |
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