lab-intro-node-solution.js

class SortedList {
  constructor() {
    this.items = [];
    this.length = 0;
  }

  add(item) {
    this.items.push(item);
    this.items.sort((a, b) => {
      if (a > b) {
        return 1;
      } else if (a < b) {
        return -1;
      } else {
        return 0;
      }
    });
    // this.items.sort((a, b) => a - b);
    this.length = this.items.length;
  }

  get(pos) {
    if (pos > this.items.length - 1) {
      throw new Error('OutOfBounds');
    } else {
      return this.items[pos];
    }
  }

  max() {
    if (this.length === 0) {
      throw new Error('EmptySortedList');
    } else {
      return this.items[this.length - 1];
    }
  }

  min() {
    if (!this.length) {
      throw new Error('EmptySortedList');
    } else {
      return this.items[0];
    }
  }

  sum() {
    return this.items.reduce((total, value) => {
      return total + value;
    }, 0);
  }

  avg() {
    if (this.length === 0) {
      throw new Error('EmptySortedList');
    } else {
      return this.sum() / this.length;
    }
  }
}

module.exports = SortedList;