Minor reedit;

new topic in readme.md;

Author: CuberArt

Program.cs

@@ -1,51 +1,9 @@
 // See https://aka.ms/new-console-template for more information
 
 using algorithms_cs.Algorithm.Sort.External.Merge;
-using algorithms_cs.Tape;
-using algorithms_cs.Serial;
 
+const int numberWays = 4;
+const string pathFile = "E:\\projects\\algorithms-cs\\resource\\1.test";
 
-//var b1 = new BufferedTapeReader((string)"E:\\projects\\algorithms-cs\\resource\\1.test");
-//var b2 = new BufferedTapeReader((string)"E:\\projects\\algorithms-cs\\resource\\2.test");
-//var b3 = new BufferedTapeReader((string)"E:\\projects\\algorithms-cs\\resource\\3.test");
-
-/*
-var seriesList = new List<Series>();
-
-seriesList.Add(new Series(b1));
-seriesList.Add(new Series(b2));
-seriesList.Add(new Series(b3));
-
-var collector = new Collector(seriesList);
-
-SeriesReturn<double> value;
-do
-{
-    value = collector.Next();
-    Console.Write( value.GetType() == SeriesReturnType.Correct ? value.GetValue() + " " : "");
-} while (value.GetType() == SeriesReturnType.Correct);
-*/
-
-
-
-
-
-
-/*var s1 = new Series(b1);
-SeriesReturn<double> value;
-do
-{
-    do
-    {
-        value = s1.Next();
-        Console.Write(value.GetType());
-        Console.WriteLine(value.GetValue());
-    } while (value.GetType() == SeriesReturnType.Correct);
-    s1 = new Series(b1);
-} while (value?.GetType() != SeriesReturnType.TapeEnded);*/
-
-
-
-var sort = new MultiwaySort(4, (string)"D:\\coding\\algorithm-cs\\resource\\1.test");
-
+var sort = new MultiwaySort(numberWays, pathFile);
 sort.Start();

readme.md

@@ -8,6 +8,33 @@ Overview
 This project is designed to learning **computer science** by [a roadmap](https://roadmap.sh/computer-science).
 
 
+Use
+---
+
+For start sorting file create `MultiwaySort()` with 2 parameters such `number of ways` and (`filename` or path file).
+Then call `Start()` method.
+
+After sorting is completed, a new file will be created with the same name and postscript `-sorted`.
+
+
+Example use
+-----------
+```csharp
+using algorithms_cs.Algorithm.Sort.External.Merge;
+
+const int numberWays = 4;
+const string pathFile = @"someDirectory\\resource\\1.test";
+
+var sort = new MultiwaySort(NumberWays, PathFile);
+sort.Start();
+```
+
+```
+/1.test            12 4 1 2 -6 12 645 12 54 -2,0001
+/1.test-sorted     -6 -2,0001 1 2 4 12 12 12 54 645 
+```
+
+
 External Multiway Merge Sort
 ----------------------------
 

src/Algorithm/Sort/External/Merge/Collector.cs

@@ -34,9 +34,10 @@ private MinReturn Min()
             Index = 0
         };
 
-        for (int i = 0; i < _bufferSeriesReturns.Count; i++)
+        for (var i = 0; i < _bufferSeriesReturns.Count; i++)
         {
-            if (_bufferSeriesReturns[i].GetType() == SeriesReturnType.Correct && value > _bufferSeriesReturns[i].GetValue())
+            if (_bufferSeriesReturns[i].GetType() == SeriesReturnType.Correct 
+                && value > _bufferSeriesReturns[i].GetValue())
             {
                 value = _bufferSeriesReturns[i].GetValue();
                 minReturn.Element = _bufferSeriesReturns[i];
@@ -47,15 +48,9 @@ private MinReturn Min()
         return minReturn;
     }
 
-    public bool IsEmpty()
-    {
-        return _bufferSeriesReturns.All(x => x.GetType() != SeriesReturnType.Correct);
-    }
+    private bool IsEmpty() => _bufferSeriesReturns.All(x => x.GetType() != SeriesReturnType.Correct);
 
-    public bool TapeEnded()
-    {
-        return _bufferSeriesReturns.All(x => x.GetType() == SeriesReturnType.TapeEnded);
-    }
+    public bool TapeEnded() => _bufferSeriesReturns.All(x => x.GetType() == SeriesReturnType.TapeEnded);
 
     public SeriesReturn<double> Next()
     {

src/Algorithm/Sort/External/Merge/MergeSort.cs

@@ -3,7 +3,6 @@
 
 namespace algorithms_cs.Algorithm.Sort.External.Merge;
 
-
 public class MultiwaySort: Sort
 {
     private readonly string _sourceFilePath;
@@ -13,14 +12,15 @@ public class MultiwaySort: Sort
     private List<Tape.Tape> _tapes;
     private readonly string _templateNameFiles;
 
-
     public MultiwaySort(int N, string sourceFilePath)
     {
         if (N <= 1) throw new InvalidDataException("");
 
         _sourceFilePath = sourceFilePath;
+        
         var directoryName = Path.GetDirectoryName(_sourceFilePath);
         if (directoryName == null) throw new DirectoryNotFoundException();
+        
         _tempDirectory = directoryName + "\\temp\\";
         _templateNameFiles = _tempDirectory + "tempfile-{0}.multiwaymergesort";
         Directory.CreateDirectory(_tempDirectory);
@@ -30,11 +30,11 @@ public MultiwaySort(int N, string sourceFilePath)
 
         var firstFilenames = new List<string>();
         var secondFilenames = new List<string>();
-        for (int i = 0; i < _n; i++)
+        for (var i = 0; i < _n; i++)
         {
             firstFilenames.Add(string.Format(_templateNameFiles, i.ToString()));
         }
-        for (int i = _n; i < _n*2; i++)
+        for (var i = _n; i < _n*2; i++)
         {
             secondFilenames.Add(string.Format(_templateNameFiles, i.ToString()));
         }
@@ -73,12 +73,8 @@ private void InitTapeSplit()
     { 
         var initTape = new BufferedTapeReader(_sourceFilePath);
 
-        var tapeWrites = new List<TapeWriter<double>>();
-        foreach (var filename in _dominoes.WriteFilenames)
-        {
-            tapeWrites.Add(new TapeWriter<double>(filename));
-        }
-        
+        var tapeWrites = _dominoes.WriteFilenames.Select(filename => new TapeWriter<double>(filename)).ToList();
+
         var indexTape = 0;
         if (indexTape >= _n) throw new IndexOutOfRangeException("indexTape out of range tapeWrites");
 
@@ -128,7 +124,6 @@ private int MainRound()
         var writeTapes = new List<TapeWriter<double>>();
         if (writeTapes == null) throw new ArgumentNullException(nameof(readTapes));
         writeTapes.AddRange(_dominoes.WriteFilenames.Select(filename => new TapeWriter<double>(filename)));
-
 
         var indexTape = 0;
         if (indexTape >= _n) throw new IndexOutOfRangeException("indexTape out of range tapeWrites");

src/Algorithm/Sort/Sort.cs

@@ -2,13 +2,5 @@ namespace algorithms_cs.Algorithm.Sort;
 
 public abstract class Sort
 {
-    protected Sort()
-    {
-        
-    }
-
-    private void Start()
-    {
-        
-    }
+    protected Sort() { }
 }

src/Tape/TapeReader.cs

@@ -39,7 +39,7 @@ private bool ValueIsDigit(int value)
     public virtual TapeReturn<double> Next()
     {
         var token = "";
-        bool tokenIsNumber = false;
+        var tokenIsNumber = false;
         //_isHaveNumber = IsEnd();
 
         while (!IsEnd)
@@ -54,7 +54,9 @@ public virtual TapeReturn<double> Next()
             if (!tokenIsNumber) continue;
 
             // Checking negative or float number or continues digit
-            tokenIsNumber = ValueIsDigit(currentChar is '.' or ',' or '-' ? nextChar : currentChar);
+            tokenIsNumber = ValueIsDigit(currentChar is '.' or ',' or '-'
+                ? nextChar
+                : currentChar);
 
             if (!tokenIsNumber)
             {