Question FirstOrDefault not working even with System.Linq;

I've got no idea what going on, I followed a tutorial from a couple years ago to setup local multiplayer, however I already had a project made so I've been modifying existing code to add the tutorial code. Because of this I might not have imported an asset or package I needed.


using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerInputHandler : MonoBehaviour
{
private PlayerInput playerInput;
private Player1 player1;
// Start is called before the first frame update
private void Awake()
{
playerInput = GetComponent<PlayerInput>();
var player1s = FindObjectOfType<Player1>();
var index = playerInput.playerIndex;
player1 = player1s.FirstOrDefault(p => p.GetPlayerIndex == index);
}

// Update is called once per frame
void Update()
{

}
}

the FirstOrDefault has the error 'Player1' does not contain a definition for 'FirstOrDefault' and no accessible extension method 'FirstOrDefault' accepting a first argument of type 'Player1' could be found.

Thanks

 

well I found the fix and its just as stupid as you might think.
Change 'FindObjectOfType' to 'FindObjectsOfType'
and that's it. AutoComplete can be a b**** sometimes lol

 

That's the potential risk of using "var" as it may hide issues that would resurface further down the road. In your case because you used

FindObjectOfType

instead of

FindObjectsOfType

the variable

var player1s

would be automatically of type

Player1

instead of

Player1[]

. Typing out the type explicitly would already cause an error in that line. The

var

simply adapted to the "wrong" return type so the Linq methods of course failed since the variable was not a collection.

Don't get me wrong. I also use var in such cases. However, especially when debugging issues, you should be sure about what type you're expecting. In Visual Studio you can hover the var keyword with your mouse and the tooltip will tell you the actual type.