Algorithms

Title Case a Sentence

Learn how to solve the freeCodeCamp algorithm 'Title Case a Sentence' using String.toLowerCase(), String.split(), Array.map(), and more!

Algorithms

Truncate a String

Learn how to solve the freeCodeCamp algorithm 'Truncate a String' using a for-loop and the String.slice() method!

Algorithms

Repeat a String Repeat a String

Learn how to solve the freeCodeCamp algorithm 'Repeat a String Repeat a String' using a for-loop, Array.push(), and Array.join().

Algorithms

Mutations

Learn how to solve the freeCodeCamp algorithm 'Mutations' using the String.toLowerCase() & String.indexOf() methods and a good old-fashioned for-loop!

Algorithms

Where Do I Belong

Learn how to solve the freeCodeCamp algorithm 'Where Do I Belong' using the Array.sort() method and some good old fashioned logic!

JavaScript

Diff Two Arrays

Learn how to solve the freeCodeCamp algorithm 'Diff Two Arrays' using the Array.indexOf() JavaScript method and a for-loop.

JavaScript

Sum All Numbers in a Range

Learn how to solve the freeCodeCamp algorithm 'Sum All Numbers in a Range' using the Array.sort() JavaScript method and a for-loop.

Tutorials Featured

GitHub API Tutorial

Build a simple web application by learning the fundamentals of the GitHub API and then display dynamic data to the front-end!

GitHub API Tutorial (Original)

Build a simple web application by learning the fundamentals of the GitHub API and then display dynamic data to the front-end!

JavaScript

String.charAt()

The JavaScript String.charAt() method returns a new string containing the character from the index specified.

Tutorials

Creating Your Own Cryptocurrency In 10 Simple Steps

Learn how to create your own cryptocurrency in 10 simple steps. Create a smart contract and deploy it to the blockchain within minutes!

JavaScript

Chunky Monkey

Learn how to solve the freeCodeCamp algorithm 'Chunky Monkey' using a for-loop and the Array.push() JavaScript method.

Algorithms

Wherefore Art Thou

Learn how to solve the freeCodeCamp algorithm 'Wherefore Art Thou' using the Array.filter() and other JavaScript methods.

JavaScript

Date Object

The JavaScript Date object is a great tool for using dates and times in your web application. Check out the practical example used for generating timestamps for an example chat app.

JavaScript

Array.unshift()

The Array.unshift() JavaScript method allows you to quickly add one or more items to the beginning of an array and returns the new length of said array.

JavaScript

Array.shift()

The Array.shift() JavaScript method allows you to easily remove the first item of an array, and will subsequently return the removed item.

JavaScript

Array.pop()

The Array.pop() JavaScript method allows you to easily remove the last item of an array, and will subsequently return the removed item.

JavaScript

Array.join()

The Array.join() JavaScript method takes all of the items in an array and joins them together as a string, with the option for a separator between each array item.

JavaScript

Array.reverse()

The Array.reverse() method is an extremely useful, yet simple JavaScript method that takes an array and reverses it's contents.

JavaScript

String.slice()

The JavaScript String.slice() method allows you to extract part of a string and return a new string with the extracted value.

Algorithms

Seek and Destroy

Learn how to solve the freeCodeCamp algorithm 'Seek and Destroy' using the Arguments Object and Array.prototype.splice() JavaScript methods.

Algorithms

Confirm the Ending

Learn how to solve the freeCodeCamp algorithm 'Confirm the Ending' using the String.slice() method.

Algorithms

Return Largest Numbers in Arrays

Learn how to solve the freeCodeCamp algorithm 'Return Largest Numbers in Arrays' using a for-loop and the Array.push() method.

Algorithms

Find the Longest Word in a String

Learn how to solve the freeCodeCamp algorithm 'Find the Longest Word in a String' using the String.split() method and a for loop.

Algorithms

Slice and Splice

Learn how to solve the freeCodeCamp algorithm 'Slice & Splice' using the Array.prototype.slice() and Array.prototype.splice() JavaScript methods.