Method pushAll

src/Stack.js:71–97

(iter)

  }

  pushAll(iter) {
    iter = IndexedCollection(iter);
    if (iter.size === 0) {
      return this;
    }
    if (this.size === 0 && isStack(iter)) {
      return iter;
    }
    assertNotInfinite(iter.size);
    let newSize = this.size;
    let head = this._head;
    iter.__iterate((value) => {
      newSize++;
      head = {
        value: value,
        next: head,
      };
    }, /* reverse */ true);
    if (this.__ownerID) {
      this.size = newSize;
      this._head = head;
      this.__hash = undefined;
      this.__altered = true;
      return this;
    }
    return makeStack(newSize, head);
  }

  pop() {
    return this.slice(1);