Make your own array

Question

This might be a very basic question, but really don't know how to make it. I want to create the following:

public class MyArray
{
    List<KeyValuePair<int, object>> myList = new List<KeyValuePair<int, object>>();

    public void Set_Value(int index, object value)
    {
        myList = myList.Where(a => a.Key != index).ToList();
        myList.Add(new KeyValuePair<int, object>(index, value));
    }
    public object Get_Value(int index)
    {
        if (myList.Any(a => a.Key == index)) return myList.FirstOrDefault(a => a.Key == index).Value;
        else return null;
    }
}
class Program
{
    static void Main(string[] args)
    {
        MyArray array = new MyArray();
        array[0] = "Hello world!";
    }
}

Make a array that i manipulate myself...

So what problem are you having with your array implementation? — Servy, May 07 '15 at 17:17
It's also worth noting that your implementation of this mechanism is *super* inefficient, in a lot of ways. — Servy, May 07 '15 at 17:18
This is called the [indexed property](https://msdn.microsoft.com/en-us/library/aa288464%28v=vs.71%29.aspx) — juharr, May 07 '15 at 17:19

score 1 · Accepted Answer · answered May 07 '15 at 17:19

You can add an index operator to your class:

public object this[int index]
{
    get
    {
        if (myList.Any(a => a.Key == index)) return myList.FirstOrDefault(a => a.Key == index).Value;
        else return null;
    }
    set
    {
        myList = myList.Where(a => a.Key != index).ToList();
        myList.Add(new KeyValuePair<int, object>(index, value));
    }
}

Note that you have several opportunities to improve your code; I just copy/pasted it to show the mechanics of the index operator.

score 0 · Answer 2 · edited May 23 '17 at 12:22

0

I think what you're asking is how you overload the indexer operator.

For that, see here: How do I overload the [] operator in C#

However, I'd advise against recreating the wheel here. It's probably better to actually use an array or inherit from a collection class.

edited May 23 '17 at 12:22

Community

1
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answered May 07 '15 at 17:19

Colin

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If you feel that a question is answered by another question you should flag/vote to close it as a duplicate, not post an answer with a link to the duplicate question. – Servy May 07 '15 at 17:21

Make your own array

2 Answers2