题目: Implement a trie with insert, search, and startsWith methods. 链接: http://leetcode.com/problems/implement-trie-prefix-tree/ 题解: 设计Trie.题目给了很多条件,所以大大简化了我们的思考时间.那么我们就构造一个经典的R-way Trie吧.首先要设计Trie节点,对R-way Trie的话我们使用一个R个元素的数组TrieNode[] next = new Trie
Haskell functions can take functions as parameters and return functions as return values. A function that does either of those is called a higher order function. Higher order functions aren't just a part of the Haskell experience, they pretty much ar