Class Repeat

src/Repeat.js:12–99

 * undefined, returns an infinite sequence of `value`.
 */
export class Repeat extends IndexedSeq {
  constructor(value, times) {
    if (!(this instanceof Repeat)) {
      // eslint-disable-next-line no-constructor-return
      return new Repeat(value, times);
    }
    this._value = value;
    this.size = times === undefined ? Infinity : Math.max(0, times);
    if (this.size === 0) {
      if (EMPTY_REPEAT) {
        // eslint-disable-next-line no-constructor-return
        return EMPTY_REPEAT;
      }
      // eslint-disable-next-line @typescript-eslint/no-this-alias
      EMPTY_REPEAT = this;
    }
  }

  toString() {
    if (this.size === 0) {
      return 'Repeat []';
    }
    return 'Repeat [ ' + this._value + ' ' + this.size + ' times ]';
  }

  get(index, notSetValue) {
    return this.has(index) ? this._value : notSetValue;
  }

  includes(searchValue) {
    return is(this._value, searchValue);
  }

  slice(begin, end) {
    const size = this.size;
    return wholeSlice(begin, end, size)
      ? this
      : new Repeat(
          this._value,
          resolveEnd(end, size) - resolveBegin(begin, size)
        );
  }

  reverse() {
    return this;
  }

  indexOf(searchValue) {
    if (this.size !== 0 && is(this._value, searchValue)) {
      return 0;
    }
    return -1;
  }

  lastIndexOf(searchValue) {
    if (this.size !== 0 && is(this._value, searchValue)) {
      return this.size - 1;
    }