Florin Pop

Posted on Mar 15, 2019 • Updated on Apr 26, 2019

JavaScript Coding Challenges

#javascript #coding #challenge

When it comes to programming, I am a big fan of two things: JavaScript and Coding Challenges! And I can't be happier than when I'm able to combine these two! 😃

I've (re)started recently to not only play with different Coding Challenges on sites like HackerRank, CodeWars or CodeSignal, but I'm also writing my own solutions with explanation for these challenges on my blog.

You can find a list of all the different Coding Challenges that I've tackled and solved using JavaScript:

If you are interested in solving the challenges, make sure that you solve them on your own before reading the solution as this will help you learn much more in the long run. By doing so at the end you might end up having two solutions for the same problem, which is a double win! 😉

I'm planning to write more blog posts in the future on this topic and I'd love to get your opinion on it. Is this something you are interested in reading? Are you also a fan of Coding Challenges? What about JavaScript?

All the feedback is highly appreciated! Thank you, amazing community of devs! 🙏

P.S. I'm going to update this list whenever I'm writing a new blog post, so if you are interested in reading more, make sure that you bookmark this post or you visit the challenges section on my blog often. (Or you can receive these posts directly into your inbox by clicking here).

Top comments (13)

Sundeep • Mar 16 '19 • Edited

heads up, you've got a typo - missing 'c' in Regular Brakets

I have a few beginner to intermediate level exercises for Python - you could translate them to Javascript if you are interested :)

I also have some resource links for practice ideas and sites - might help you get more challenges to solve

mehdibenhemdene • Oct 23 '19

Suggested alternative solution for "Where do I belong" using Array.prototype.filter:

var array = [1, 2, 3, 4];

function getIndexToIns(arr, number) {
  let result = arr.sort().filter(el => el <= number).length;
  return result;
}

console.log(getIndexToIns(array, 8));

mehdibenhemdene • Oct 23 '19

Also a simple "Destroyer" implementation:

function destroyer(arr, ...params) {
  return arr.filter(el=>!params.includes(el));
}

Ram Newton • Mar 20 '21

function destroyer(arr, ...params){
    params_set = new Set(params);
    return arr.filter(item => !(params_set.has(item)))
};

.includes() does a linear search. Creating a set out of the parameters and using the .has() method will improve performance

Matt MacPherson • Aug 30 '19

Check out Edabit; I think you'll like it.

Ricardo Pedroso • Jan 24 '20

Thanks for the post, I had a lot of fun going through these exercises!

For the phone number one, I'll leave here my one line solution:

Have a nice day :)

Deepak Pal • Mar 16 '19

Good Post to read and thank for sharing the links

Florin Pop • Mar 16 '19

My pleasure! ☺️

Daniel Med • Mar 16 '19

Thank you so much for that , as a developer I think the only way to define you level is by solving coding challenges , hope we see some other challenges