Decode a Binary Message using JavaScript

#javascript #tutorial

Today I passed 14k subs on Twitter and as usual I wrote a tweet to thank all the people who support me on this journey.

But this time I did something different. Instead of staying: 14,000, I've put the number in binary: 11011010110000.

And something fun happened...

My good friend Mike replied with a message that was in binary format. 🙈

Mike Eling

@drfr0st

@florinpop1705 01010100 01101000 01100001 01110100 00100111 01110011 00100000 01110011 01101111 00100000 01100011 01101111 01101111 01101100 00100000 01000110 01101100 01101111 01110010 01101001 01101110 00100001 😊

09:01 AM - 29 Jan 2020

0 1

That's something he would obviously do (because he's a hacker 😆).

So now... I had to decode it.

Here is a Video Tutorial if you are interested to see how I did it:

...

Or for you "lazier" people out there, here is the code:

// storing the message
const mes =
    '01011001 01101111 01110101 00100000 01100001 01110010 01100101 00100000 01110111 01100101 01101100 01100011 01101111 01101101 01100101';

const res = mes
    // split the string into an array of strings (removing the ' ')
    .split(' ')
    // map over the substrings and convert them to numbers
    .map(b => parseInt(b, 2))
    // map over again to convert the numbers to characters
    .map(num => String.fromCharCode(num))
    // join the characters back into a string
    .join('');

// getting the answer
console.log(res);

I hope you enjoyed this little tutorial!

Happy Coding! 😇

Top comments (7)

Barzi • Jan 30 '20

Hi Florin, thank you for your post. I really appreciate the way you wrote your code (I'm one of those lazy guys that didn't watch your video), I find it very clean and straightforward. Keep it up!