Array in Array Swift

Question

Ich habe ein Array wie folgt mit 13 Elementen.

var data =[“MonthFolder/", 
"MonthFolder/January", 
"MonthFolder/February", 
"MonthFolder/March", 
"DayFolder/", 
"DayFolder/Monday", 
"DayFolder/Tuesday", 
"DayFolder/Wednesday", 
"DayFolder/Thursday", 
"YearFolder/", 
"YearFolder/2016", 
"YearFolder/2015", 
"YearFolder/2014"] 

Ich versuche, wie unten

[("MonthFolder/January","MonthFolder/February","MonthFolder/March"), 
("DayFolder/Monday","DayFolder/Tuesday","DayFolder/Wednesday","DayFolder/Thursday"), 
("YearFolder/2016", "YearFolder/2015”, "YearFolder/2014")]” 

ein Array mit Endergebnis drucken ich dieses

var fileName = [AnyObject]() 
var allFiles = [AnyObject]() 

for item in data{ 

    let keyString = item.characters.last 

    if keyString != "/"{ 
     fileName.append(item) 
    } 
    else if keyString == "/"{ 
     if fileName.count > 0{ 
      allFiles.append(fileName) 
      fileName = [] 
     } 
    } 
} 

und bekam die Ausgabe als

[("MonthFolder/January","MonthFolder/February","MonthFolder/March"), 
("DayFolder/Monday","DayFolder/Tuesday","DayFolder/Wednesday","DayFolder/Thursday”)] 

getan haben, fehlt das dritte Objekt in allFiles bec Verwenden Sie andernfalls die Else, wenn die Bedingung für die letzte Iteration fehlschlägt. Wie erreiche ich meine gewünschte Leistung? Vielen Dank.

Answer 1

Auf diese Weise werden Sie Ausgang zu erwarten erhalten:

var fileName = [AnyObject]() 
var allFiles = [AnyObject]() 

for item in data{ 

    let keyString = item.characters.last 

    if keyString != "/"{ 
    fileName.append(item) 
    } 
    else if keyString == "/"{ 
    if fileName.count > 0{ 
     allFiles.append(fileName) 
     fileName = [] 
    } 
    } 
} 
if fileName.count != 0 { 
    allFiles.append(fileName) 
    fileName = [] 
} 

Hoffnung das wird dir helfen :)

Answer 2

Ich habe schon versucht, diese

 


    var data = ["MonthFolder/", "MonthFolder/January", "MonthFolder/February", "MonthFolder/March", "DayFolder/", "DayFolder/Monday", "DayFolder/Tuesday", "DayFolder/Wednesday", "DayFolder/Thursday", "YearFolder/", "YearFolder/2016", "YearFolder/2015", "YearFolder/2014"]; 
    var fileName = [] 
    for (item in data) {   
     var keyString = data[item].split("/"); 
     if(keyString[1] == "") 
      { 
       var keyV = keyString[0]; 
       fileName[keyV]= new Array(); 
      } 
      else 
      { 
       fileName[keyV].push(data[item]);     
      } 
    } 
    console.log(fileName) 

und ich bekam eine Ausgabe wie

 
[ 


DayFolder 
    ["DayFolder/Monday", "DayFolder/Tuesday", "DayFolder/Wednesday", "DayFolder/Thursday"] 

MonthFolder 
    ["MonthFolder/January", "MonthFolder/February", "MonthFolder/March"] 

YearFolder 
    ["YearFolder/2016", "YearFolder/2015", "YearFolder/2014"] 
    ] 

Bitte überprüfen

Answer 3

Functional Art und Weise:

var data = ["MonthFolder/", 
      "MonthFolder/January", 
      "MonthFolder/February", 
      "MonthFolder/March", 
      "DayFolder/", 
      "DayFolder/Monday", 
      "DayFolder/Tuesday", 
      "DayFolder/Wednesday", 
      "DayFolder/Thursday", 
      "YearFolder/", 
      "YearFolder/2016", 
      "YearFolder/2015", 
      "YearFolder/2014"] 

var allFolders = [String]() 
var allFiles = [String]() 

func gatherFiles(files: [String], inFolders folders: [String]) -> [[String]] { 
     return folders.map { folder in 
      return (files.filter { $0.containsString(folder)}) 
     } 
    } 

for item in data { 
    let components = item.componentsSeparatedByString("/").filter({!$0.isEmpty}) 
    if components.count > 1 { 
     allFiles.append(item) 
    } else { 
     allFolders.append(item) 
    } 
} 

let finalArr = gatherFiles(allFiles, inFolders: allFolders) 

Hinweis

• Nachteile: Mit dieser Art und Weise, es gibt mehr Iterationen.
• Pro: Sie könnten es wiederverwenden?

Answer 4

Versuchen Sie, diese

data.forEach { (item) ->() in 
    if item.characters.last != "/" { 
     fileName.append(item) 
    } else if fileName.count > 0 { 
     allFiles.append(fileName) 
     fileName = [] 
    } 
} 
allFiles.append(fileName) 
print(allFiles) 

Answer 5

Sie auch allgemeinere Ansatz basiert auf Wörterbuch struct

var filesDict = [String : [String]]() 

for fileName in data { 
    let fileComponents = fileName.componentsSeparatedByString("/") 
    let fileKey = fileComponents[0] 
    let fileValue = fileComponents[1] 

    var itemsArray = filesDict[fileKey] 
    if itemsArray == nil { 
     itemsArray = [] 
    } 

    if fileValue != "" { 
     itemsArray!.append(fileName) 
    } 
    filesDict[fileKey] = itemsArray 
} 

//conversion from Dictionary to Array 
let outputArray = Array(filesDict.values) 
print(outputArray) 

Ausgang

[["MonthFolder/January", "MonthFolder/February", "MonthFolder/March"], 
["DayFolder/Monday", "DayFolder/Tuesday", "DayFolder/Wednesday", "DayFolder/Thursday"], 
["YearFolder/2016", "YearFolder/2015", "YearFolder/2014"]]