C#•2y 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•2y ago

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

Angius•2y ago

What is the error?

MathallOP•2y ago

I'm not sure to be honest

BeyondMo•2y ago

Can you send the whole code snippet

MathallOP•2y ago

one moment

MathallOP•2y ago

message.txt

MathallOP•2y ago

oop sorry

Angius•2y ago

$code

MODiX•2y 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•2y ago

Or $paste more like

MODiX•2y 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•2y 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•2y ago

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

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MathallOP•2y ago

would you also like the Question class?

MathallOP•2y ago

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

BlazeBin - bhyzkojmfeuu

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MathallOP•2y ago

well there it is if needed

Angius•2y ago

Seems... fine Does it build?

MathallOP•2y ago

nope

Angius•2y ago

Even from the CLI, with dotnet build?

MathallOP•2y ago

let me try nope

MathallOP•2y ago

I understant the null pointer erros just not the namespace stuff

BeyondMo•2y ago

You cant use public inside your function i guess

Angius•2y ago

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

BeyondMo•2y ago

And i recommend u to use .add to ur list

MathallOP•2y ago

Oh, interesting, thanks

Angius•2y ago

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

MathallOP•2y ago

i got rid of the publics and it works thanks!

Angius•2y ago

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

MathallOP•2y ago

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

Angius•2y ago

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

MathallOP•2y 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•2y 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•2y ago

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

Angius•2y ago

It is a new list

BeyondMo•2y ago

[] does that for u

Angius•2y ago

It already has the type information in one place

MathallOP•2y ago

oh, i see

Angius•2y ago

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

MathallOP•2y ago

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

Angius•2y ago

Should be

MODiX•2y 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•2y ago

MathallOP•2y ago

what is the "record" i havent seen that before

Angius•2y ago

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

MathallOP•2y ago

neat, thanks I appreciate the help

MODiX•2y 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•2y ago

Here's what this record compiles into

MathallOP•2y 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•2y 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•2y ago

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

Angius•2y ago

Properties

MathallOP•2y ago

Alright well thanks for your help I really appreciate

Angius•2y ago

Anytime :Ok:

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method with object lists error

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