CODEWITHSUNDEEP
c#arrayslist
user15810432
user15810432

Reputation:

When I append something to my array it doesn't add anything to the list

basically I'm trying to append something to an array, but for some reason in wont even work.

(gObject is a thing with a name and a value)

public gObject[] OBJECTS = {};
public void RegisterObjectToRender(gObject reg)
{
    OBJECTS.Append<gObject>(reg);
    for (int ri = 0; ri < OBJECTS.Length; ri++)
    {
       Console.WriteLine(OBJECTS[ri].Name);
    }
}

I hope everyone who is reading this is having a good day btw

Upvotes: 2

Views: 1886

Answers (2)

Mike Wijnen
Mike Wijnen

Reputation: 174

Append returns a new IEnumerable. It does not add to the OBJECTS, but essentially returns a new list. You have to capture the result of Append and use that: var extendedList = OBJECTS.Append(reg).

A better way is to use a list and use Add instead of Append. It is faster and cleaner.

Upvotes: 2

Marc Gravell
Marc Gravell

Reputation: 1062610

Arrays are fixed size, always. If you want a list: use a list, i.e. use List<Your type> instead of an array. A list has an Add method.

I'm guessing the Append method here is a local extension method that only exists in your code (that isn't a normal API). I'm also guessing that it calls Array.Resize internally, but: that creates a new and different array - it doesn't change the existing array. So if you use that, you'd need to swap the underlying reference afterwards, too - to the new array reference. However, don't do that: Array.Resize is incredibly inefficient, as it allocates a new array every append (contrast List<T> which keeps an oversized backing array, and tracks the count separately, only increasing the underlying array occasionally).

Upvotes: 3

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