mellowzippy Posts - Answer Overflow

mellowzippy

•Created by mellowzippy on 5/27/2024 in #help

✅ Readonly methods

My VSCode is telling me to change my methods to readonly. I can't find a good explanation anywhere as to what this does and why it's recommended. So I'd really like an explanation from someone who knows.

public struct Note(Book book, List<Entry> entries) : IEnumerable<Entry>
{
    public Book book = book;
    public List<Entry> entries = entries;

    public Note(Book book) : this(book, []) { }

    public Note(Book book, Entry entry) : this(book, [entry]) { }

    public readonly void Add(Entry entry)
    {
        entries.Add(entry);
    }

    public readonly void Remove(string title)
    {
        foreach (Entry entry in entries)
        {
            if (entry.Title == title)
            {
                entries.Remove(entry);
            }
        }
    }
    
    public IEnumerator<Entry> GetEnumerator()
    {
        return entries.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}

public struct Note(Book book, List<Entry> entries) : IEnumerable<Entry>
{
    public Book book = book;
    public List<Entry> entries = entries;

    public Note(Book book) : this(book, []) { }

    public Note(Book book, Entry entry) : this(book, [entry]) { }

    public readonly void Add(Entry entry)
    {
        entries.Add(entry);
    }

    public readonly void Remove(string title)
    {
        foreach (Entry entry in entries)
        {
            if (entry.Title == title)
            {
                entries.Remove(entry);
            }
        }
    }
    
    public IEnumerator<Entry> GetEnumerator()
    {
        return entries.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}

10 replies

CC#

•Created by mellowzippy on 4/23/2024 in #help

✅ Mysterious byte problem

45 replies

CC#

•Created by mellowzippy on 1/29/2024 in #help

Having trouble understanding patterns

Hello, I`m a second year student and I'm reading about patterns like a factory pattern. I have trouble understanding why I should use patterns and when to use which pattern.

254 replies

CC#

•Created by mellowzippy on 2/13/2023 in #help

❔ ✅ Trouble printing values

class Program
{
    public static void Main()
    {
        var square = new Square(5);
        Console.Write($"Side: {square.Side}");
        Console.WriteLine($"Area: {square.Area()}");
        Console.WriteLine($"Perimeter: {square.Perimeter()}");

        var square2 = new Square(10);
        Console.Write($"Side: {square2.Side}");
        Console.WriteLine($"Area: {square2.Area()}");
        Console.WriteLine($"Perimeter: {square2.Perimeter()}");
    }
}

class Square
{
    public int Side;

    public Square(int side)
    { this.Side = side; }

    public int Area() => this.Side * this.Side;
    public int Perimeter() => this.Side * 4;
}

class Program
{
    public static void Main()
    {
        var square = new Square(5);
        Console.Write($"Side: {square.Side}");
        Console.WriteLine($"Area: {square.Area()}");
        Console.WriteLine($"Perimeter: {square.Perimeter()}");

        var square2 = new Square(10);
        Console.Write($"Side: {square2.Side}");
        Console.WriteLine($"Area: {square2.Area()}");
        Console.WriteLine($"Perimeter: {square2.Perimeter()}");
    }
}

class Square
{
    public int Side;

    public Square(int side)
    { this.Side = side; }

    public int Area() => this.Side * this.Side;
    public int Perimeter() => this.Side * 4;
}

Expected output:

Side: 5
Area: 25
Perimeter: 20
Side: 10
Area: 100
Perimeter: 40

Side: 5
Area: 25
Perimeter: 20
Side: 10
Area: 100
Perimeter: 40

Actual output:

Side: 5Area: 25
Perimeter: 20
Side: 10Area: 100
Perimeter: 40

Side: 5Area: 25
Perimeter: 20
Side: 10Area: 100
Perimeter: 40

How do I get it to print under each other and not next to each other?

7 replies

Gaming

Programming