Print arraylist values to console

Question

With the help of info here I created a random unique number generator in an arraylist.

I want to print the arraylist content to my console but I only get this message: System.Collections.ArrayList

If I use .Count or .IndexOf it works. I can't find a solution anywhere on the internet. And Unity doesn't support arraylist in their documentation at all.

Thanks!

My code:

 var totalHumans:int = 8;
 var aHuman = ArrayList();
 
 function Start ()
 {
     while (aHuman.Count < totalHumans)
     {
         var human = Random.Range(0, 17);
         if (!aHuman.Contains(human))
         aHuman.Add(human);
         
     }
     Debug.Log(aHuman);
 }

Answer 1

Best Answer

Answer by Molix · Jun 08, 2011 at 01:48 PM

You can iterate over the list with something like:

 for( var human in aHuman )
 {
   Debug.Log( human );
 }

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Freich · Jun 08, 2011 at 02:07 PM 0

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I'll try, thanks :)

Freich · Jun 09, 2011 at 09:37 AM 1

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It works, thank you.

Answer 2

Answer by jana-jarecki · Jan 17, 2017 at 01:29 PM

In case anyone is still following up, here is what I use to get a one-line array output

 Debug.Log("Human = " +String.Join("",
             new List<int>(aHuman)
             .ConvertAll(i => i.ToString())
             .ToArray()));

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gabearts · Aug 09, 2017 at 05:51 AM 0

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Worked Beautifully, thank you!

takibacsi · Sep 07, 2018 at 03:41 PM 0

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This is a very nice implementation, you can also concat several strings into one in the ConvertAll section. I use it to log child-parent name pairs.

diwang · Oct 13, 2019 at 05:15 AM 0

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For efficiency , ToArray() is not needed because unity already treat List<> similar to the way they treat array , so without ToArray() it still work and give better performance .

Answer 3

Answer by Pflegeleichtt · Jun 08, 2011 at 01:48 PM

I think your're looking for an Array().

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Freich · Jun 08, 2011 at 01:58 PM 1

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No, because I have to use .Contains. Which is only supported by ArrayList();

Answer 4

Answer by iggy · Jun 08, 2011 at 01:51 PM

here are all the methods for ArrayList.

http://msdn.microsoft.com/en-us/library/system.collections.arraylist_methods(v=VS.85).aspx

i don't think there is one you seek.

why don't you add in your WHILE loop something like this:

Debug.Log("human"+aHuman.Count+"="+human);

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Freich · Jun 08, 2011 at 02:06 PM 0

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Yes I read a lot on the pages there. Here the example staits: "The following code example shows how to create and initialize an ArrayList and how to print out its values". http://msdn.microsoft.com/en-us/library/7x4b0a97%28v=VS.80%29.aspx It's JavaScript, so I suppose it's possible? Bit difficult for me to understand.

Anyway thanks, I'll try what you said :)

iggy · Jun 08, 2011 at 11:14 PM 0

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yea just be careful when copy-pasting from $$anonymous$$SDN.

There is no "Console.Write" in Unity but use something similar like "Debug.Log()", etc...

Print arraylist values to console

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