Streak · 7 days+185 XP
7-Day Scala Kata Streak
Solve one small coding exercise in Scala every day for a week. Check in once a day.
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Coding · Facts & stats · iChallenge network
The Scala Challenge
Daily facts and stats about the scala programming language and functional coding, plus real challenges to put them to work.
Today's 3 challenges
In what year was Scala first publicly released?
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Streak0days
LeagueBronzeweekly
Daily #28Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Proof+250 XP
Model It With a Case Class
Write a short Scala program that models something from your day with a case class and pattern matching. Post a short write-up or a code link.
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Streak · 14 days+220 XP
14-Day Immutable Habit
Each day, refactor one bit of code to use val and immutable collections instead of var. Check in once a day.
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By the numbers
Live counts from ScalaChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days15
Challenge joins11
Leaderboard
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Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
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- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
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Questions
What languages count?
Any language. Challenges score consistency and completion, not syntax.
Is this for beginners?
Yes — quiz rounds start easy and scale with your streak.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.