Implement peek() and pop() from java iterator(). 这道题应该是这样子问的。。# JobHunting - 待字闺中
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Implement peek() and pop() from java iterator().
for example [1,2,3,4,5], peek() = 1, pop() = 1, peek() = 2, peek() = 2, pop(
) = 2
for example [1,2,3,4,5], peek() = 1, pop() = 1, peek() = 2, peek() = 2, pop(
) = 2