10 more Javascript Challenges!

Do you know Javascript? After the success of the previous video, I've decided to make a second one with 10 more challenges to test your knowledge of the language.

These are 4 out of the 10 challenges you'll find in the video:

The ++ operator is really handy and you can put it either before or after the variable. But do you know the difference between the two?

let value = 3;console.log(value++);console.log(++value);

You can use _ and the letter e in numbers and they're still valid!

const THE_ANSWER = 1_2 + 3e1;console.log(THE_ANSWER);

Isn't the output here supposed to be 7 on both cases? Actually, none of them is 7!

const x = "5";console.log(1 + 1 + x);console.log(x + 1 + 1);

Can you spot any unintended side effect here?

let me = { name: "Leonardo", socials: { twitter: "@balastrong" } };let luca = { ...me };luca.name = "Luca";luca.socials.twitter = "@puppo92";console.log(me);console.log(luca);

If you're curious about the answers, you can find them in the video below. I hope you enjoy it!

In the video above, I go through all challenges and show the answer, but I also recorded a slower version where I actually explain them in more detail. If you're curious and want to learn more, you can find it here.

Let me know how many did you got right! :D

Thanks for reading this article, I hope you found it interesting!

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Leonardo MontiniFollow

I talk about Open Source, GitHub, and Web Development. I also run a YouTube channel called DevLeonardo, see you there!