[swift] LeetCode 49. Group Anagrams

Given an array of strings, group anagrams together.

Example:

Input: ["eat", "tea", "tan", "ate", "nat", "bat"] ,

Output:[ [“ate”,”eat”,”tea”], [“nat”,”tan”], [“bat”] ]

Note:

• All inputs will be in lowercase.
• The order of your output does not matter.

func groupAnagrams(_ strs: [String]) -> [[String]] {
    var dict = [String: [String]]()
    strs.forEach {
        let s = String($0.sorted())
        dict[s] = (dict[s] == nil) ? [$0] : dict[s]! + [$0]
    }
    return dict.map({$0.value})
}

（随着网站访问量的激增，服务器配置只得一再升级以维持网站不“404 Not Found”，所以网站的维护费用也在不断上涨……（目前的阿里云服务器ECS+云数据库RDS+域名购买+七牛云的费用是2200元/年），为了能不放弃该网站，所以我又把打赏链接放上来啦～所有打赏金额都会被记账并投入博客维护中，感谢厚爱，多多关照～）