Practice resources for the challenge

Hello all!

As the 21DCC start date approaches, we recommend you check out some of prep resources we’ve prepared to get ahead early, and to make sure you hit the ground running on day one.

We’ve prepared a three-part JavaScript crash course so you can learn (or revisit) some of the concepts we’ll be covering during the challenge.

Additionally, you can read some of our insider tips and tricks for getting the best out of your 21DCC experience.

Good luck!

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For those of us who are complete n00bs, I have a stupid question…

I’m trying to do the practice exercises on this page:

I cannot for the life of me find a link to anything that tells me WHERE to type these things. Do you have any recommended (free or open source) coding applications, some kind of compiling tool, or are we literally just supposed to type out what we think it will be in Notepad and move on?


You can use as it’s a browser-based editor, and no need to download any software. Let us know if there’s anything else that comes up and we’d be happy to help.


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