consol. logに表示されない。

Question

cosole.logが表示されずエラーも表示されない。

class Element {
  constructor(name, buildYear) {
    this.name = name;
    this.buildYear = buildYear;
  }
}

class Park extends Element {
  constructor(name, buildYear, area, numTrees) {
    super(name, buildYear);
    this.area = area;
    this.numTrees = numTrees;
  }

  treeDensity() {
    const density = this.numTrees / this.area;
    console.log(`${this.name} has a tree density of ${density} trees per square km.`);
  }
}

class Street extends Element {
  constructor(name, buildYear, length, size = 3) {
    super(name, buildYear);
    this.length = length;
    this.size = size;
  }
  classifyStreet() {
    const classification = new Map();
    classification.set(1, 'tiny');
    classification.set(2, 'small');
    classification.set(3, 'normal');
    classification.set(4, 'big');
    classification.set(5, 'huge');
    console.log(`${this.name},build in ${this.buildYear}, is a${classification.get(this.size)}street.`);
  }
}
//1, 木の密度を調べたい。

const allParks = [new Park('Green park', 1987, 0.2, 215),
  new Park('National Park', 1894, 2.9, 3541),
  new Park('Oak  Park', 1953, 0.4, 949)
];

const allStreets = [new Street('Ocean Avenue', 1999, 1.1, 4),
  new Street('Evergreen Street', 2008, 2.7, 2),
  new Street('4th Street', 2015, 0.8),
  new Street('Sunset Boulevard', 1982, 2.5, 5)];

function calc(arr) {

  const sum = arr.reduce((prev, cur, index) => prev + cur, 0);
  //[3,5,6]

  return [sum, sum / arr.length];

}

function reportParks(p) {

  console.log('-------Parks report--------');

  //density
  p.forEach(el => el.treeDensity());
  //Average age
  const ages = p.map(el => new Date().getFullYear() - el.buildYear);
  const [totalAge, avgAge] = calc(ages);
  console.log(`Our ${p.length} parks have an average of ${avgAge} years`);

  //which park has mora than 1000 trees
}

function reportStreets(s) {

}![イメージ説明](bd4cf3e7fa058fab0c41c377e8ecc8bd.png)

Comments

[kei344]

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Answer 1

donefon====---------

Comments

[m.ts10806]

意味わかりません。
質問にもなってないし指摘はスルー。
自己解決も誰のためにもならない。
なぜ質問したんですか？