How do I implement the word ladder (BFS) in Swift?

In this guide, we will explore how to implement the word ladder problem using Breadth-First Search (BFS) in Swift. A word ladder is a puzzle where you start with a given word and change one letter at a time to form a new word, with the goal of reaching a target word. BFS is an effective algorithm for finding the shortest transformation sequence from the start word to the target word.

Swift Implementation of Word Ladder

Here's a straightforward implementation using BFS:

import Foundation func wordLadder(beginWord: String, endWord: String, wordList: [String]) -> [String]? { var wordSet = Set(wordList) guard wordSet.contains(endWord) else { return nil } var queue: [(String, [String])] = [(beginWord, [beginWord])] var visited = Set() while !queue.isEmpty { let (currentWord, path) = queue.removeFirst() if currentWord == endWord { return path } visited.insert(currentWord) for i in 0..

word ladder BFS Swift algorithm programming data structures code challenge

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