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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using Microsoft.VisualBasic.FileIO; | ||
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| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| var path = @"../babynames.csv"; | ||
| List<BabyName> namelist = new List<BabyName>(); | ||
| using (TextFieldParser csvReader = new TextFieldParser(path)) | ||
| { | ||
| csvReader.CommentTokens = new string[] { "#" }; | ||
| csvReader.SetDelimiters(new string[] { "," }); | ||
| csvReader.HasFieldsEnclosedInQuotes = true; | ||
| csvReader.ReadLine(); | ||
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| while (!csvReader.EndOfData) | ||
| { | ||
| // Read current line fields, pointer moves to the next line. | ||
| string[]? fields = csvReader.ReadFields(); | ||
| var newRecord = new BabyName(year_string: fields[0], name_string: fields[1], | ||
| percent_string: fields[2], gender_string: fields[3]); | ||
| namelist.Add(newRecord); | ||
| } | ||
| } | ||
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| // Angabe mit LINQ Semantik | ||
| // Was sind die zehn Namen von Jungen mit den höchsten Anteilen dem gesamten Datenzeitraum? | ||
| var query = from s in namelist | ||
| where s.gender == "boy" | ||
| orderby s.percent descending | ||
| select s; | ||
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| // Beispiel mit Methoden Syntax | ||
| // Was sind die zehn Namen von Mädchen mit den höchsten Anteilen dem gesamten Datenzeitraum? | ||
| var query2 = namelist.Where(x => x.gender == "girl") | ||
| .OrderByDescending(x => x.percent); | ||
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| Console.WriteLine("\n\nTop 10 Jungen Namen Top 10 Mädchen Namen"); | ||
| Console.WriteLine("---------------------- ----------------------"); | ||
| for (int i = 0; i < 10; i++){ | ||
| var boys = query.ElementAt(i); | ||
| var girls = query2.ElementAt(i); | ||
| Console.Write("{0,-6} - {1,-10} {2:0.000}", boys.year, boys.name, boys.percent); | ||
| Console.WriteLine(" {0,-6} - {1,-10} {2:0.000}", girls.year, girls.name, girls.percent); | ||
| } | ||
| } | ||
| } | ||
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| class BabyName: IComparable | ||
| { | ||
| // Readonly properties can only be set in the constructor. | ||
| public int year { get; private set; } | ||
| public string name { get; private set; } | ||
| public double percent { get; private set; } | ||
| public string gender { get; private set; } | ||
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| public BabyName(string year_string, string name_string, | ||
| string percent_string, string gender_string) | ||
| { | ||
| year = int.Parse(year_string); | ||
| name = name_string; | ||
| percent = double.Parse(percent_string); | ||
| gender = gender_string; | ||
| } | ||
|
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| public override string ToString(){ | ||
| return $"{this.year} - {this.name}"; | ||
| } | ||
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| public int CompareTo(object obj){ | ||
| if (obj == null) return 1; | ||
| BabyName otherName = obj as BabyName; | ||
| return this.percent>otherName.percent ? 1 : -1; | ||
| } | ||
| } |
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