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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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Ad
6 kyu
Minimum dollar bill's count
179jteodoro
Fundamentals
Arrays
Algorithms
6 kyu
Change Machine
400Lordnibbler
Algorithms
Performance
Retired
Christmas Day (retired)
1,140fizis
Date Time
Fundamentals
Retired
Authenticate a list of usernames (retired)
639PiotrBerebecki
Strings
Regular Expressions
Arrays
Data Structures
Algorithms
6 kyu
TGI Friday!!
1,014papuarza
Date Time
6 kyu
Custom sort function
1,255lunitik
Sorting
Arrays
Algorithms
Restricted
7 kyu
Sorting Arrays ... wait, what?!
505donaldsebleung
Algorithms
Logic
Object-oriented Programming
Sorting
5 kyu
Array.diff hero
732Iprit
Arrays
Fundamentals
7 kyu
Find the Combination
500hfliu
Fundamentals
Strings
Regular Expressions
7 kyu
Simple Moon Rating
685morteify
Fundamentals
5 kyu
Not Quine
344_nderscore
Algorithms
4 kyu
Default Arguments
1,331xcthulhu
Functional Programming
Metaprogramming
6 kyu
Javascript filter - 3
2,057ineiti
Regular Expressions
Arrays
Fundamentals
5 kyu
Sorted list
393osuushi
Algorithms
Arrays
Performance
Object-oriented Programming
Sorting
6 kyu
Count word occurrences
270Uraza
Strings
Algorithms
6 kyu
Once
6,191osuushi
Functional Programming
Fundamentals
6 kyu
Shortest code: Bug in Apple
477myjinxin2015
Puzzles
Games
Restricted
6 kyu
100 prisoners, 100 drawers, 100 paper slips
54donaldsebleung
Puzzles
Mathematics
Probability
Logic
6 kyu
Probability 101
95valerio_c
Probability
Mathematics
Fundamentals
6 kyu
Fun with lists: filter
1,172janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Fun with lists: map
1,701janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Fun with lists: reduce
1,101janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Numerology
2,216user4806669
Date Time
Fundamentals
6 kyu
Coding Meetup #10 - Higher-Order Functions Series - Create usernames
3,442PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
6 kyu
Coding Meetup #16 - Higher-Order Functions Series - Ask for missing details
2,524PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
6 kyu
The Non-Discriminate Factorial
1,014SamTay
Mathematics
Fundamentals
Retired
Validate my Password (retired)
3,787Capocaccia
Regular Expressions
Fundamentals
5 kyu
Maximum Contiguous Sum
919thibaultCha
Arrays
Algorithms
6 kyu
Trim a String
2,391BattleRattle
Strings
Regular Expressions
Fundamentals
6 kyu
Find the unique number
2,151kayahr
Arrays
Performance
Fundamentals
5 kyu
Partition On
6,640jcorbin@wunjo.org
Functional Programming
Arrays
Algorithms
6 kyu
Sum The Tree
4,937jz9000
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Fundamentals
5 kyu
7-segment converter
702wthit56
Binary
Bits
Fundamentals
5 kyu
Bit calculator
2,123riomus
Bits
Mathematics
Algorithms
6 kyu
Function composition
9,462matthewglover
Functional Programming
Fundamentals
6 kyu
Island Count
250finetype
Puzzles
5 kyu
Missing and Duplicate Number
243Uraza
Arrays
Algorithms
5 kyu
Advanced Pig Latin
1,187davidbrear
Regular Expressions
Fundamentals
6 kyu
Reverse linked list
1,147vgrichina
Algorithms
Lists
Data Structures
6 kyu
The Most Sacred of Days
548laoris
Date Time
Algorithms
5 kyu
#Hashtag
1,137barakyo
Strings
Regular Expressions
Algorithms
6 kyu
Dreidel dreidel
874steinbachr
Games
Algorithms
6 kyu
Santa's Master Plan
991xDranik
Arrays
Filtering
Algorithms
5 kyu
Vending Machines
522xcthulhu
Puzzles
Algorithms
6 kyu
Array Helpers
23,827BattleRattle
Arrays
Fundamentals
Object-oriented Programming
5 kyu
Word Finder
2,060BattleRattle
Strings
Regular Expressions
Filtering
Algorithms
5 kyu
Simple Linear Regression Cost Function (Machine Learning)
301Ban-Ath
Machine Learning
Algorithms
Mathematics
Data Science
6 kyu
None shall pass
1,357adriaanbaelus
Security
Puzzles
5 kyu
Fibonacci Generator
922x-way
Mathematics
Algorithms
5 kyu
Compose functions (T Combinator)
2,289kylehill
Functional Programming
Fundamentals
5 kyu
Object extend
1,531kylehill
Arrays
Fundamentals
6 kyu
Simple Fun #254: Factorized GCD
106myjinxin2015
Fundamentals
Mathematics
7 kyu
Greed
805rememberchicken
Regular Expressions
Debugging
6 kyu
Recursion: An introduction
472powderham
Recursion
Fundamentals
Tutorials
6 kyu
Next smaller pronic
859LesRamer
Mathematics
Algorithms
Fundamentals
6 kyu
Maximum and minimum
408osofem
Fundamentals