C#•6mo ago

method with object lists error

Hey all, new to C# and am trying to learn some basics, so im starting by making a trivia game, however im running into an error and i'm not sure why, any help would be greatly appreciated!

54 Replies

MathallOP•6mo ago

going to add another part later that goes through the lists and randomly picks and writes a questions

Angius•6mo ago

What is the error?

MathallOP•6mo ago

I'm not sure to be honest

shanks•6mo ago

Can you send the whole code snippet

MathallOP•6mo ago

one moment

MathallOP•6mo ago

message.txt

MathallOP•6mo ago

oop sorry

Angius•6mo ago

$code

MODiX•6mo ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat For longer snippets, use: https://paste.mod.gg/

Angius•6mo ago

Or $paste more like

MODiX•6mo ago

If your code is too long, you can post to https://paste.mod.gg/, save, and copy the link into chat for others to see your shared code!

Angius•6mo ago

And the whole thing. My suspicion is you have something like a variable inside of a namespace, a semicolon after an if(), something like that

MathallOP•6mo ago

https://paste.mod.gg/tkfiymhsvnwo/0

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MathallOP•6mo ago

would you also like the Question class?

MathallOP•6mo ago

https://paste.mod.gg/bhyzkojmfeuu/0

BlazeBin - bhyzkojmfeuu

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MathallOP•6mo ago

well there it is if needed

Angius•6mo ago

Seems... fine Does it build?

MathallOP•6mo ago

nope

Angius•6mo ago

Even from the CLI, with dotnet build?

MathallOP•6mo ago

let me try nope

MathallOP•6mo ago

I understant the null pointer erros just not the namespace stuff

shanks•6mo ago

You cant use public inside your function i guess

Angius•6mo ago

Oooooh Good catch! Yeah, local variables don't have access modifiers They're local

shanks•6mo ago

And i recommend u to use .add to ur list

MathallOP•6mo ago

Oh, interesting, thanks

Angius•6mo ago

I don't recommend .Add at all, it would make the whole thing unnecessarily verbose

MathallOP•6mo ago

i got rid of the publics and it works thanks!

Angius•6mo ago

I'd even shorten it even more with target-type new and collection expressions

MathallOP•6mo ago

im thinking about changing it to an array once i confirm all the questions im going to use

Angius•6mo ago

Or even better, by loading the questions from a json file

MathallOP•6mo ago

yeah no clue what that is lol was thinking about this but still inexperienced with json and just wanted to get a working thing

Angius•6mo ago

List<Thing> things = [
    new(1, 2, 3, "Goodbye"),
    new(4, 5, 6, "Hello"),
];

List<Thing> things = [
    new(1, 2, 3, "Goodbye"),
    new(4, 5, 6, "Hello"),
];

MathallOP•6mo ago

oh interesting, so you dont need to define it as a new list?

Angius•6mo ago

It is a new list

shanks•6mo ago

[] does that for u

Angius•6mo ago

It already has the type information in one place

MathallOP•6mo ago

oh, i see

Angius•6mo ago

It knows it's a list, and a list of things

MathallOP•6mo ago

would it be the same for an array? or similar with an array syntax

Angius•6mo ago

Should be

MODiX•6mo ago

Angius

REPL Result: Success

record Thing(int Foo, string Name);

Thing[] foos = [
    new(1, "a"),
    new(2, "b"),
];

record Thing(int Foo, string Name);

Thing[] foos = [
    new(1, "a"),
    new(2, "b"),
];

Compile: 370.544ms | Execution: 66.123ms | React with ❌ to remove this embed.

Angius•6mo ago

MathallOP•6mo ago

what is the "record" i havent seen that before

Angius•6mo ago

It's basically a shorthand for creating a class + constructor + properties + other stuff

MathallOP•6mo ago

neat, thanks I appreciate the help

MODiX•6mo ago

Angius

sharplab.io (click here)

record Thing(int Foo, string Name);

record Thing(int Foo, string Name);

Try the /sharplab command! | React with ❌ to remove this embed.

Angius•6mo ago

Here's what this record compiles into

MathallOP•6mo ago

So would one moment let me write this out lol

c#
class Thing
{
  int Foo;
  string Name;
  public Thing(int Foo, string Name) {
    this.Foo = Foo;
    this.Name = Name;
  }
}

c#
class Thing
{
  int Foo;
  string Name;
  public Thing(int Foo, string Name) {
    this.Foo = Foo;
    this.Name = Name;
  }
}

be the same as the record

Angius•6mo ago

class Thing
{
  public int Foo { get; init }
  public string Name { get, init; }
  public Thing(int Foo, string Name) {
    this.Foo = Foo;
    this.Name = Name;
  }
}

class Thing
{
  public int Foo { get; init }
  public string Name { get, init; }
  public Thing(int Foo, string Name) {
    this.Foo = Foo;
    this.Name = Name;
  }
}

would be closer But yes

MathallOP•6mo ago

ah yea, i havent really gone into the whole get set finish whatnots

Angius•6mo ago

Properties

MathallOP•6mo ago

Alright well thanks for your help I really appreciate

Angius•6mo ago

Anytime :Ok:

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method with object lists error