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You know what, left pad is javascript package and referenced by React: Github link One day his author unpublished it, then a lot of javascript project 阅读全文
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Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integ 阅读全文
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For an array A, if i < j, and A [i] > A [j], called (A [i], A [j]) is a reverse pair.return total of reverse pairs in A. ExampleGiven A = [2, 4, 1, 3, 阅读全文
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17.9 Design a method to find the frequency of occurrences of any given word in a book. 这道题让我们找书中单词出现的频率，那么首先需要搞清楚的问题是，只需要统计一个单词，还是多个单词。如果是一个单词的话，那直接就遍 阅读全文
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17.8 You are given an array of integers (both positive and negative). Find the contiguous sequence with the largest sum. Return the sum. LeetCode上的原题， 阅读全文
