tommy Posts - Answer Overflow

tommy

•Created by tommy on 11/17/2024 in #help

✅ How do Avro, ORC and Parquet work?

I have been learning about big data and these came across as a few of the popular "optimized file formats". I want to understand how they work.

13 replies

CC#

•Created by tommy on 11/16/2024 in #help

✅ What is the use of `LogLevel` type in C#?

I have also tried to use this type by adding the using Microsoft.Extensions.Logging; directive, but this shows me an error that the Extensions type does not exist in the Microsoft namespace. How to use this then?

10 replies

CC#

•Created by tommy on 11/13/2024 in #help

✅ How to add newlines in ASP.NET Web Forms?

What I have been doing is that making a Label and adding <br /> as its text. But this doesn't seem to be working on Firefox. Are there any alternative methods?

3 replies

CC#

•Created by tommy on 11/11/2024 in #help

✅ Difference between `string[]` and `IEnumerable<string>`

in the following the code, the output seems to be the same:

using System;
using System.IO;

class Program
{
  public static void Main()
  {
    foreach (string dir in Directory.GetDirectories("Settings"))
      Console.WriteLine(dir);
    
    foreach (string dir in Directory.EnumerateDirectories("Settings"))
      Console.WriteLine(dir);
  }
}

using System;
using System.IO;

class Program
{
  public static void Main()
  {
    foreach (string dir in Directory.GetDirectories("Settings"))
      Console.WriteLine(dir);
    
    foreach (string dir in Directory.EnumerateDirectories("Settings"))
      Console.WriteLine(dir);
  }
}

i know that enums are used to define a set of exhaustive types, and are closely related to ints. but what does it mean to have IEnumerable<string> and how different is it from string[]?

23 replies

CC#

•Created by tommy on 11/4/2024 in #help

why do we declare overloaded operators as `static` methods?

i have been looking for a simple answer that i can understand because i am beginner.

20 replies

CC#

•Created by tommy on 11/2/2024 in #help

✅ Having trouble going from the old syntax to top level statements

i have been learning C# using the old syntax. i do not know the name for it, but this is what it is:

using System;
class Program
{
  public static void Main()
  {
    Console.WriteLine("Hello, World!");
  }
}

using System;
class Program
{
  public static void Main()
  {
    Console.WriteLine("Hello, World!");
  }
}

but now that i have started working on Visual Studio, i am having a hard time learning what is the meaning of top level statements. So, how to think about this, considering that i have learnt my basics over Notepad?

9 replies

CC#

•Created by tommy on 10/22/2024 in #help

/reference flag in C# compiler

What is the use of this flag?

12 replies

CC#

•Created by tommy on 10/19/2024 in #help

✅ difference between `MyClass obj2 = obj1;` and `MyClass obj2 = new MyClass(obj1);`

I am learning copy constructors and trying to know how to create shallow and deep copy constructors.

47 replies

CC#

•Created by tommy on 10/16/2024 in #help

✅ what is a primary constructor? is it any similar to parameterless constructor?

the content provided on Microsoft Learn is confusing.

172 replies

CC#

•Created by tommy on 10/10/2024 in #help

✅ difference between internal and file access modifiers

the content on Microsoft Learn is a bit difficult to understand.

46 replies

CC#

•Created by tommy on 9/14/2024 in #help

Why do we enclose the `Main` function inside of a class in C#?

After learning C++, I think it makes sense to include the main function outside of a class. Why do we not do it in C#? Like what disadvantage I would have by not including the main function in a class in C++? Would it be accessible to everyone? Does including the Main method in a class in C# make it "safer" than it being present at a global scope? What is the reason behind this?

9 replies

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