Jibz Posts - Answer Overflow

Jibz

•Created by Jibz on 11/3/2023 in #help

❔ How do I check for an array key in Dictionary?

Dictionary<int[], int> test =
    new()
    {
        { new int[] { 2, 3 }, 3 }, // <- this one
        { new int[] { 3, 3 }, 6 },
        { new int[] { 3, 2 }, 3 }
    };

Console.WriteLine(test.ContainsKey(new int[] { 2, 3 }));

Dictionary<int[], int> test =
    new()
    {
        { new int[] { 2, 3 }, 3 }, // <- this one
        { new int[] { 3, 3 }, 6 },
        { new int[] { 3, 2 }, 3 }
    };

Console.WriteLine(test.ContainsKey(new int[] { 2, 3 }));

output:

False

14 replies

CC#

•Created by Jibz on 9/25/2023 in #help

✅ How do I convert a char to ascii and ascii back to char?

I tried this:

int b = (int)'b';
int e = (int)'e';
int c = e - b;
Console.WriteLine("char is: " + c);

int b = (int)'b';
int e = (int)'e';
int c = e - b;
Console.WriteLine("char is: " + c);

and the output is:

char is:

basically .... nothing

26 replies

CC#

•Created by Jibz on 8/15/2023 in #help

✅ cannot connect console dotnet project with microsoft SQL

I'm following this : https://learn.microsoft.com/en-us/azure/azure-sql/database/connect-query-dotnet-core?view=azuresql-mi I'm running microsoft sql from docker. I can access my database from azure data studio by setting server as "localhost" so I tried to do the same in my code. My confusion is here builder.DataSource = "<your_server.database.windows.net>"; setting "server" in azure data studio works so I thought it should work as well in code but it throws error when I do this: builder.DataSource = "localhost"; or this builder.DataSource = "localhost.database.windows.net"; What am i doing wrong?

4 replies

CC#

•Created by Jibz on 8/10/2023 in #help

❔ BinaryFormatter.Serialize(Stream, object)' is obsolete, What do I use instead?

I'm learning serialization in C# but it says binary formatters are obsolete. what should i use?

11 replies

CC#

•Created by Jibz on 7/27/2023 in #help

getting warning: CS8618 - Non-nullable variable must contain a non-null value when exiting construct

I guess, it's not a big deal since the code is getting compiled but I still want to understand why I'm getting this warning and how can I resolve this. I was using a generic struct

truct Rectangle<T> 
{
    T length;
    T width;

    public T Length{
        readonly get{ return length; }
        set{ length = value; }
    }
    public T Width{
        readonly get{ return width; }
        set{ width = value; }
    }

    public Rectangle(T L, T W) // <-- this is where I am getting the warning
    {
        Length = L;
        Width = W;
    }
}

truct Rectangle<T> 
{
    T length;
    T width;

    public T Length{
        readonly get{ return length; }
        set{ length = value; }
    }
    public T Width{
        readonly get{ return width; }
        set{ width = value; }
    }

    public Rectangle(T L, T W) // <-- this is where I am getting the warning
    {
        Length = L;
        Width = W;
    }
}

45 replies

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