src/utils/CircularArray.ts

   1
   2 export default class CircularArray<T> extends Array<T> {
   3   public size: number;
   4   private readonly maximumCircularArraySize = 2000;
   5
   6   constructor(size?: number) {
   7     super();
   8     this.size = size && size <= this.maximumCircularArraySize ? size : this.maximumCircularArraySize;
   9   }
  10
  11   push(...items: T[]): number {
  12     if (this.length + items.length > this.size) {
  13       super.splice(0, (this.length + items.length) - this.size);
  14     }
  15     return super.push(...items);
  16   }
  17
  18   unshift(...items: T[]): number {
  19     if (this.length + items.length > this.size) {
  20       super.splice(this.size - items.length, (this.length + items.length) - this.size);
  21     }
  22     return super.unshift(...items);
  23   }
  24
  25   concat(...items: (T|ConcatArray<T>)[]): T[] {
  26     if (this.length + items.length > this.size) {
  27       super.splice(0, (this.length + items.length) - this.size);
  28     }
  29     return super.concat(items as T[]);
  30   }
  31
  32   splice(start: number, deleteCount?: number, ...items: T[]): T[] {
  33     this.push(...items);
  34     return super.splice(start, deleteCount);
  35   }
  36 }