Method unshift

tfjs-data/src/util/ring_buffer.ts:137–143

* Adds an item to the beginning of the buffer.

(value: T)

   * Adds an item to the beginning of the buffer.
   */
  unshift(value: T) {
    if (this.isFull()) {
      throw new RangeError('Ring buffer is full.');
    }
    this.begin = this.wrap(this.begin - 1);
    this.set(this.begin, value);
  }

  /**
   * Removes and returns the first item in the buffer.