[Swift]LeetCode937. 重新排列日志文件 | Reorder Log Files

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You have an array of logs.  Each log is a space delimited string of words.

For each log, the first word in each log is an alphanumeric identifier.  Then, either:

  • Each word after the identifier will consist only of lowercase letters, or;
  • Each word after the identifier will consist only of digits.

We will call these two varieties of logs letter-logs and digit-logs.  It is guaranteed that each log has at least one word after its identifier.

Reorder the logs so that all of the letter-logs come before any digit-log.  The letter-logs are ordered lexicographically ignoring identifier, with the identifier used in case of ties.  The digit-logs should be put in their original order.

Return the final order of the logs.

Example 1:

Input: ["a1 9 2 3 1","g1 act car","zo4 4 7","ab1 off key dog","a8 act zoo"]
Output: ["g1 act car","a8 act zoo","ab1 off key dog","a1 9 2 3 1","zo4 4 7"]

Note:

  1. 0 <= logs.length <= 100
  2. 3 <= logs[i].length <= 100
  3. logs[i] is guaranteed to have an identifier, and a word after the identifier.

你有一个日志数组 logs。每条日志都是以空格分隔的字串。

对于每条日志，其第一个字为字母数字标识符。然后，要么：

  • 标识符后面的每个字将仅由小写字母组成，或；
  • 标识符后面的每个字将仅由数字组成。

我们将这两种日志分别称为字母日志和数字日志。保证每个日志在其标识符后面至少有一个字。

将日志重新排序，使得所有字母日志都排在数字日志之前。字母日志按字母顺序排序，忽略标识符，标识符仅用于表示关系。数字日志应该按原来的顺序排列。

返回日志的最终顺序。

示例 ：

输入：["a1 9 2 3 1","g1 act car","zo4 4 7","ab1 off key dog","a8 act zoo"]
输出：["g1 act car","a8 act zoo","ab1 off key dog","a1 9 2 3 1","zo4 4 7"]

提示：

  1. 0 <= logs.length <= 100
  2. 3 <= logs[i].length <= 100
  3. logs[i] 保证有一个标识符，并且标识符后面有一个字。
92ms
 1 class Solution {
 2     func reorderLogFiles(_ logs: [String]) -> [String] {
 3         var digitLogs  = [String]()
 4         var letterLogs = [String]()
 5         var keys = [String]()
 6         var letterDic = [String:String]()
 7         for log in logs {
 8             if log.last! >= "a" && log.last! <= "z" {
 9                 var index = 0
10                 let length = log.count
11                 for char in log {
12                     if char == " " {
13                         let suffix = String(log.suffix(length-index-1))
14                         letterDic[suffix] = log
15                         keys.append(suffix)
16                         break
17                     }
18                     index += 1
19                 }
20             }else {
21                 digitLogs.append(log)
22             }
23         }
24         keys = keys.sorted()
25         for key in keys {
26             letterLogs.append(letterDic[key] ?? "")
27         }
28         return letterLogs+digitLogs
29     }
30 }

96ms

 1 class Solution {
 2     struct Log {
 3         let identifier: String
 4         let content: String
 5         let orig: String
 6         let isLetter: Bool
 7         
 8         init(_ orig: String) {
 9             self.orig = orig
10             
11             let index = orig.firstIndex(of: " ")!
12             self.identifier = String(orig[orig.startIndex..<index])
13             self.content = String(orig[orig.index(after:index)...])
14             self.isLetter = Int(String(self.content.first!)) == nil            
15         }
16     }
17     func reorderLogFiles(_ logs: [String]) -> [String] {
18         
19         let logsArr: [Log] = logs.map { Log($0) }
20         var letters = logsArr.filter { $0.isLetter }
21         var digits = logsArr.filter { !$0.isLetter }
22         
23         letters.sort { 
24             if $0.content == $1.content {
25                 return $0.identifier < $1.identifier
26             } else {
27                 return $0.content < $1.content
28             }
29         }
30         
31         return [letters, digits].flatMap { arr in
32             return arr.map { $0.orig }
33         }
34     }
35 }

104ms

 1 class Solution {
 2     func reorderLogFiles(_ logs: [String]) -> [String] {
 3         
 4         let letters = logs.filter {
 5             let lastChar = $0.charAt($0.count - 1) 
 6             return CharacterSet.letters.contains(lastChar.unicodeScalars.first!)
 7         }.map { 
 8             $0.split(separator: " ") 
 9         }.map {
10             (Array($0[1..<$0.count]).joined(separator: " "), $0[0])
11         }.sorted {
12             return $0.0 < $1.0
13         }
14 
15         let digits = logs.filter {
16             let lastChar = $0.charAt($0.count - 1)
17             return CharacterSet.decimalDigits.contains(lastChar.unicodeScalars.first!)
18         }
19         
20         return letters.map { $0.1 + " " + $0.0 } + digits
21     }
22 }
23 
24 extension String {
25     func charAt(_ pos:Int) -> String {
26         guard pos < self.count else {
27             assertionFailure("Index out of range!")
28             return String()
29         }
30         let index = self.index(self.startIndex, offsetBy: pos)
31         return String(self[index])
32     }
33 }

108ms

 1 class Solution {
 2         func reorderLogFiles(_ logs: [String]) -> [String] {
 3             var letters = [String]();
 4             var digits = [String]();
 5             var output = [String]();
 6             for log in logs{
 7                 let elements = log.split(separator: " ");
 8                 let firstElement = elements[1];
 9                 var isLetter = false;
10                 for char in firstElement.utf8{
11                     if (char >= "a".utf8.first! && char <= "z".utf8.first!){
12                         isLetter = true;
13                         break;
14                     }
15                 }
16                 if isLetter{
17                     letters.append(log);
18                 }else{
19                     digits.append(log);
20                 }
21             }
22             letters.sort(by: {(a:String,b:String)->Bool in
23                 var index = a.firstIndex(of: " ");
24                 index = a.index(index!, offsetBy: 1)
25                 let suffixA = a.suffix(from: index!)
26                 index = b.firstIndex(of: " ")
27                 index = b.index(index!, offsetBy: 1)
28                 let suffixB = b.suffix(from: index!)
29                 return suffixA < suffixB;
30             })
31             for str in letters{
32                 output.append(str)
33             }
34             for str in digits{
35                 output.append(str)
36             }
37             return output;
38         }
39     }

112ms

 1 class Solution {
 2     func reorderLogFiles(_ logs: [String]) -> [String] {
 3         guard logs.count > 0 else {
 4             return []
 5         }
 6         var result : [String] = []
 7         var alphaLogDictionary : [String : (identifier : String, word : String)] = [:]
 8         var digitLogArray : [String] = []
 9 
10         for log in logs{
11             if isDigitLog(log){
12                 digitLogArray.append(log)
13             }else{
14                 alphaLogDictionary[log] = dissectAlphaLog(log)
15             }
16         }
17         
18         let sortedAlpha = alphaLogDictionary.sorted { (first, second) -> Bool in
19             if first.value.word == second.value.word{
20                 return first.value.identifier < second.value.identifier
21             }else{
22                 return first.value.word < second.value.word
23             }
24         }
25         
26         for pair in sortedAlpha{
27             result.append(pair.key)
28         }
29         for value in digitLogArray{
30             result.append(value)
31         }
32         
33         return result
34         
35     }
36     
37     private func dissectAlphaLog(_ s : String)->(identifier : String, word : String){
38         var str = Array(s)
39         var movingIndex : Int = 0
40         var identifier : String = ""
41         var word : String = ""
42         while movingIndex < str.count{
43             if str[movingIndex] != " "{
44                 movingIndex += 1
45             }else{
46                 identifier = String(str[0..<movingIndex])
47                 word = String(str[movingIndex..<str.count])
48                 return (identifier : identifier, word : word)
49             }
50         }
51         
52         return (identifier : "", word : "")
53         
54     }
55     
56     private func isDigitLog(_ s : String)->Bool{
57         var movingIndex : Int = 0
58         var str = Array(s)
59         var char : Character = Character.init("a")
60         while movingIndex < str.count {
61             if str[movingIndex] != " "{
62                 movingIndex += 1
63             }else{
64                 char = str[movingIndex + 1]
65                 break
66             }
67         }
68         
69         let letterSet = CharacterSet.letters
70         if letterSet.contains(char.unicodeScalars.first!){
71             return false
72         }else{
73             return true
74         }
75     }
76 }

120ms

 1 class Solution {
 2     func reorderLogFiles(_ logs: [String]) -> [String] {
 3         var n:Int = logs.count
 4         var ss:[[String]] = [[String]](repeating: [String](), count: n)
 5         for i in 0..<n
 6         {
 7             let str:String = logs[i]
 8             var end = str.firstIndex(of: " ") ?? str.endIndex
 9             //不包括结束索引
10             var id:String = String(str[str.startIndex..<end])
11             let start = end == str.endIndex ? str.endIndex : str.index(end, offsetBy: 1)
12             var rem:String = String(str[start..<str.endIndex])
13             ss[i] = [rem, id, str, String(format: "%05d",i)]
14         }
15         ss.sort(by: compare)
16         var ret:[String] = [String] (repeating:String(),count: n)
17         for i in 0..<n
18         {
19             ret[i] = ss[i][2]
20         }
21         return ret
22     }
23     
24     func compare(_ a:[String],_ b:[String]) -> Bool
25     {
26         //'0':ASCII码值 48; '9'ASCII码值 57
27         var num1:Int = a[0].toInt(0)
28         var ad:Bool = num1 >= 48 && num1 <= 57
29         
30         var num2:Int = b[0].toInt(0)
31         var bd:Bool = num2 >= 48 && num2 <= 57
32         
33         if !ad && bd{return true}
34         if ad && !bd{return false}
35         var str1:String
36         var str2:String
37         if !ad && !bd
38         {
39             if a[0] != b[0]
40             {
41                 str1 = a[0]
42                 str2 = b[0]
43             }
44             else
45             {
46                 str1 = a[1]
47                 str2 = b[1]
48             }
49         }
50         else
51         {
52             str1 = a[3]
53             str2 = b[3]
54         }
55         let num = str1.caseInsensitiveCompare(str2).rawValue
56         if num == -1
57         {
58             return true
59         }
60         return false
61     }
62 }
63 
64 extension String {
65     //获取指定索引位置的字符，返回为字符串形式
66     func charAt(_ num:Int) -> String
67     {
68         return String(self[index(self.startIndex,offsetBy: num)]) 
69     }
70     
71     //获取指定索引位置字符的ASCII整数值
72     func toInt(_ num:Int) -> Int
73     {
74         let s = charAt(num).unicodeScalars
75         return Int(s[s.startIndex].value) 
76     }
77 }

 124ms

 1 extension Array {
 2     mutating func stableSort(by areInIncreasingOrder: (Array<Element>.Element, Array<Element>.Element) -> Bool) {
 3         for startIdx in startIndex..<endIndex {
 4             for targetIdx in index(after:startIdx)..<endIndex {
 5                 if !areInIncreasingOrder(self[startIdx], self[targetIdx]) {
 6                     let tmp = self[startIdx]
 7                     self[startIdx] = self[targetIdx]
 8                     self[targetIdx] = tmp
 9                 }
10             }
11         }
12     }
13 }
14 
15 extension String {
16     var cdr:Substring? {
17         return split(separator: " ", maxSplits: 1).last 
18     }
19 }
20 class Solution {
21     func reorderLogFiles(_ logs: [String]) -> [String] {
22         let digiLogs = logs.filter{Int($0[$0.index(before:$0.endIndex)..<$0.endIndex]) != nil}
23         var letterLogs = logs.filter{Int($0[$0.index(before:$0.endIndex)..<$0.endIndex]) == nil}
24         letterLogs.sort()
25         letterLogs.stableSort{String($0.cdr!) < String($1.cdr!)}
26         return letterLogs + digiLogs
27     }
28 }

132ms

 1 class Solution {
 2     func getLogStr(_ s: String) -> Substring {
 3       return s.suffix(from: s.index(after: s.firstIndex(of: " ")!))
 4     }
 5     func isDig(_ s: String) -> Bool {
 6       let digits = Character("0")...Character("9")
 7       let l = getLogStr(s)
 8       return digits.contains(l[l.startIndex])
 9     }
10     func cmp(_ a: String, _ b: String) -> Bool {
11       let la = getLogStr(a)
12       let lb = getLogStr(b)
13       if la == lb { return a < b }
14       return la < lb
15     }
16     func reorderLogFiles(_ logs: [String]) -> [String] {
17       let dig = logs.filter(isDig)
18       let alp = logs.filter{!isDig($0)}
19       return alp.sorted(by: cmp) + dig
20     }
21 }

140ms

 1 class Solution {
 2     func reorderLogFiles(_ logs: [String]) -> [String] {
 3              let one = logs.filter { (str) -> Bool in
 4             Int(String(String(str.split(separator: " ")[1]).first!)) != nil
 5         }
 6         
 7         var two = logs.filter { (str) -> Bool in
 8             Int(String(String(str.split(separator: " ")[1]).first!)) == nil
 9         }
10         
11         two.sort { (a, b) -> Bool in
12             let arrayOne = a.split(separator: " ")
13             let arrayTwo = b.split(separator: " ")
14             let str_one = String(arrayOne[1...].joined(separator: " "))
15             let str_two = String(arrayTwo[1...].joined(separator: " "))
16             return str_one<str_two
17         }
18         
19         return two + one
20     }
21 }
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原文地址：https://www.cnblogs.com/strengthen/p/9942450.html