学ぶ Challenge: Object Property Iteration with hasOwnProperty()

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Task

Create a loop that iterates through the properties of an object and prints each property along with its value. However, you should only print properties that belong directly to the object, not those inherited from its prototype chain. Utilize the hasOwnProperty() method to achieve this.


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const song = {
  name: "Bohemian Rhapsody",
  band: "Queen",
  released: "31 October 1975",
  duration: 355,
};

___ (___ ___ in ___) {
  if (song.___(key)) {
    console.log(`${key}:`, song[key]);
  }
}

Expected output:

name: Bohemian Rhapsody
band: Queen
released: 31 October 1975
duration: 355

Use a for...in loop to iterate through the object's properties.
Within the loop, check if each property is an own property of the object using hasOwnProperty() before logging it.


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const song = {
  name: "Bohemian Rhapsody",
  band: "Queen",
  released: "31 October 1975",
  duration: 355,
};

for (let key in song) {
  if (song.hasOwnProperty(key)) {
    console.log(`${key}:`, song[key]);
  }
}

すべて明確でしたか？

フィードバックありがとうございます！

セクション 1. 章 16

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セクション 1. 章 16