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Commit 909871d

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Question 76
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‎README.md‎

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@@ -3079,3 +3079,55 @@ The correct answer is D, and btw "happy new year"!
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</p>
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</details>
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###### 76. What's the output?
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```javascript
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const address = {
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name: 'hoccoban.com',
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author: 'Vuong Nguyen',
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}
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const key = Reflect.has(address, 'author') ? Reflect.ownKeys(address)[0] : "hello";
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Reflect.set(address, 'language', 'JavaScript');
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const totalKeys = Reflect.ownKeys(address).length;
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const name = Reflect.get(address, key).length;
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const language = Reflect.get(address, 'language').length
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console.log(totalKeys + name + language);
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```
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- A: 22
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- B: 10
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- C: 20
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- D: 25
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<details><summary><b>Answer</b></summary>
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<p>
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The correct answer is D. Why? Now let break it down:
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- `Reflect.has(address, 'author')` gives us `true` given that the object `address` has the key `author`. Simple as it is. So the value of the variable `key` is now `Reflect.ownKeys(address)[0]`, which in fact is the key `name`.
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- `Reflect.set(address, 'language', 'JavaScript');` set another key-value to the object `address`.
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- `Reflect.ownKeys(address).length;` gives us 3 because now it has three keys, so `totalKeys` is now 3.
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- `Reflect.get(address, key).length;` gives us the length of the string `hoccoban.com` which is 12.
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- `Reflect.get(address, 'language').length` is the length of the string `JavaScript`, which is 10.
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- The final answer is 3 + 12 + 10 = 25.
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#### Answer: D
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</p>
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</details>
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