Trie

What is a Trie? A Trie is a data structure usually called a “prefix tree,” often represented as a nested tree of dictionaries where each key is a character that maps to the next character in a word. Let’s look at some examples of a Trie. The Trie consists of two main classes: the TrieNode class and the Trie class. TrieNode The TrieNode class has two properties: children - a property that represents all characters in a given word and points to the next character. isEndSymbol - a property that indicates the end of the word in a given sequence of characters. final class TrieNode { var children: [Character: TrieNode?] var isEndSymbol: Bool init() { self.children = [:] self.isEndSymbol = false } } Trie The Trie class has two main operations, insert and exists, and a root property that stores all possible combinations of words. ...