Cannot find the length of an array

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Hello! I am getting an error when I try to find the length of an array! All I am trying to accomplish with this script is spawn a random gameobject from an array. To do that I need to find the length of an array, yet for some reason Unity won't let me do that. The error I am getting is: CS0117 UnityEngine.GameObject[] does not contain a definition for 'Length'

Here is my code, also note I have tried to just print the length of the array to the console out of the instantiate and just in the start function, it resulted in the same error.

 using UnityEngine;
 using System.Collections;
 
 public class SpawnScript : MonoBehaviour {
     
     public GameObject[] objects;
     
     // runs spawn func
     void Start () {
         Spawn();
     }
     
     //spawns in a random item from an array and then does it every .5 seconds.
     void Spawn()
     {    
         Instantiate(objects[Random.Range (0, objects.Length)], transform.position, Quaternion.identity);
         Invoke ("Spawn", .5f);
     }
 }

Thanks for viewing (and hopefully helping)!

Answer 1

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Answer by benbendixon · Sep 06, 2015 at 03:29 PM

@bunny83 @wibble82 Yes I am sure I haven't changed anything. I even created a new project and tried running a debug line that would just print the length of a simple array and that didn't work. I have not "given up" on this question, I just simply don't have anything to add. I have been trying to work with a support member. Feel free to mark the question as unreproduceable.

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Mikilo · Sep 06, 2015 at 05:40 PM 0

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Did you try to look through a step-by-step debugger?

Bunny83 · Sep 07, 2015 at 01:56 AM 0

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@benbendixon: Well, you haven't addressed any of the questions we asked back.

Like:

What exact Unity version do you use?
Where exactly do you get that error? In Unity, in $$anonymous$$onoDevelop, in another IDE you use like VisualStudio?
I asked you to copy and paste the exact and complete error message from the console that includes the file name and line / column numbers.

Apart from that there are at least 2 different "XXX doesn't contain a definition for YYY" errors. There is CS0117 and CS1061. CS1061 would usually apply to your case but you say you get CS0117 which applies to cases where you try to access a member in a "base class" which is completely impossible for array types since you can't derive classes from an array type.

If you ignore all the other counter questions, at least tell use which exact Unity version you're using. For example i still use "5.1.1f1 Personal". You can see that version in the "About" screen.

Nobody is able to reproduce your problem and i don't even know any way to purposely generate that exact error.

benbendixon · Sep 07, 2015 at 04:00 AM 0

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@Bunny83 I haven't answered any of the questions because I am already in contact with unity support and this appears to be something that only they would be able to figure out since it is their software and there is an issue with my install or something like that. If you would like me to answer them I will.

I am running Unity 4.6.3f Personal

It happens in line 16 and I already gave the error message, I would copy and paste but I am much farther along in my game and am no longer using this script because of the error.

I get the error in unity and monodevelop.

Answer 2

Answer by Cryptomane · Sep 06, 2015 at 04:07 PM

Works fine for me, even if the array was empty.

The only thing that comes to my mind might be some corrupted library in your project, OR ...

Do you have a "GameObject" class in your project?

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benbendixon · Sep 06, 2015 at 05:45 PM 0

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No I do not, as I said it is something wrong with my install of unity obviously. I am working with support.

Answer 3

Answer by OceKat3 · Oct 27, 2019 at 10:32 PM

@benbendixon This is how I fixed the problem for myself: Use an uppercase L in "Length" instead of a lowercase one. The unity documentation makes it seem like you should use a lowercase L, which I find weird.

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Mikilo · Oct 27, 2019 at 10:34 PM 0

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The documentation? Can you provide the link?

Bunny83 Mikilo · Oct 29, 2019 at 11:15 AM 0

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Probably this one. I agree that the documentation is a little bit misleading as they describe both UnityScript's Array class (which does not exist anymore) and native C# built-in arrays. The code example is about the built-in arrays while the actual page is about the Array class. The "length" property of that class actually was lower case.

If you want to look up information on standard / built-in C# / .NET framework classes, head for the $$anonymous$$SDN documentation

Cannot find the length of an array

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