Chris Heilmann, Daniel Cranney, Justin Halsall, Werner Jeschko & Nicole Jeschko and Mirco Tomić

WeAreDevelopers LIVE - CODE100 at WeAreDevelopers Europe

A messy CSV file. A broken trophy. A JavaScript bug. Go behind the scenes of the intense CODE100 live coding challenge.

WeAreDevelopers LIVE - CODE100 at WeAreDevelopers Europe
#1about 2 minutes

Introducing the CODE100 live coding competition

The host introduces the CODE100 challenge and welcomes the moderator, winner, and fellow challengers to discuss the event.

#2about 8 minutes

The experience of coding live on a massive stage

Challengers share their experiences with stage fright, preparation strategies, and the pressure of competing in front of a large audience.

#3about 6 minutes

Breaking down the initial multiple-choice quiz questions

A review of several quiz questions covering obscure graphics formats, nested JavaScript backticks, mathematical sequences, and HTML phishing vulnerabilities.

#4about 9 minutes

Behind the scenes of the competition's technical setup

The host reveals the last-minute challenges of setting up competitor machines, dealing with AV issues, and managing live stage production.

#5about 3 minutes

Exploring data persistence, AI, and map-based challenges

A discussion of quiz questions on browser data persistence and AI hallucinations, followed by a look at the TomTom partner challenge involving maps.

#6about 12 minutes

Solving the pair programming geodistance calculation challenge

An in-depth look at the 'Capital Idea' challenge, which required parsing a tricky CSV file and implementing the Haversine formula to find distant cities.

#7about 10 minutes

Analyzing the tricky debugging and tiebreaker questions

A walkthrough of the debugging round, covering issues like JavaScript type coercion, Python f-strings, CSS Flexbox, and a tiebreaker about standardized text formats.

#8about 2 minutes

Dissecting the final challenge from Cloudflare

The winner and runner-up discuss their approaches to the final coding challenge, which involved processing a JSON dataset to find the fastest and most reliable result.

#9about 11 minutes

Prizes, reflections, and unique event traditions

The winner discusses the grand prize, an NVIDIA DGX Spark, while the host shares stories behind event traditions like the winner's bathrobe and the recurring broken trophy.

Notes and resources

This week we’re not live as Chris is on his way to NYC, but we’re joined by this year’s CODE100 Champion Werner Jeschko, fellow challenger and partner Nicole Jeschko, challenger Mirco Tomić and host Justin Halsall to look back on this year’s incredible event.

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