Daily JavaScript Challenge #JS-133: Count Unique Characters in a String

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Daily JavaScript Challenge: Count Unique Characters in a String

Hey fellow developers! 👋 Welcome to today's JavaScript coding challenge. Let's keep those programming skills sharp!

The Challenge

Difficulty: Easy

Topic: Strings

Description

Create a function that counts the number of unique characters in a given string. The function should be case-sensitive, meaning that 'a' and 'A' are considered different characters.

Ready to Begin?

https://www.dpcdev.com/

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Write your solution
Test it against the provided test cases
Share your approach in the comments below!

Want to Learn More?

Check out the documentation about this topic here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set

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This is part of our Daily JavaScript Challenge series. Follow me for daily programming challenges and let's grow together! 🚀

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Top comments (1)

James Curran • Mar 25

In C#: (Since C# lets you treat a string like an array of characters, this becomes trivial)

    void Main()
    {
        string text = "the quick brown fox jumps over the lazy dog";

        CountCharacters(text).Dump();
    }

    int CountCharacters(string text) 
                              => text.Distinct().Count();