Circular Buffer Js

Questions & Answers
1

I’m attempting to create a BuiltIn Array wrapper in order to make a Circular Buffer, I basically want a class that acts just like an array… although when you Add it checks the maximum length and Shifts the first item if the length is exceeded.

What would be the best approach to this?

2

It’s a slow day, thought I’d write you one. You can use it from JS but I wrote it in C# as I wanted to create a generic version. Hence you should put this in a CS file and place it in a Plugins folder to access it from JS.

public class CircularBuffer<T> : List<T>
{
	public int Capacity = 1;
	
	public CircularBuffer(int capacity)
	{
		Capacity = capacity;
	}
	
	public CircularBuffer()
	{
	}
	
	public void Add (T item)
	{
		base.Add(item);
		if(Count > Capacity)
			RemoveAt(0);
		
	}
	public void Insert (int index, T item)
	{
		base.Insert(index,item);
		if(Count > Capacity)
			RemoveAt(0);
	}
}

To use in Javascript:

    var buffer = new CircularBuffer.<object>(10);  //Use your base class
    buffer.Add("2");

If you choose to use insert, be aware that inserting at 0 will cause it to be immediately deleted if the list is at capacity.