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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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6 kyu
Zeros and Ones
793kodejuice
Puzzles
Logic
Algorithms
6 kyu
Convert string to camel case
193,956jhoffner
Regular Expressions
Algorithms
Strings
5 kyu
Primes in numbers
29,722g964
Fundamentals
Mathematics
5 kyu
Can you get the loop ?
28,594Devouring
Algorithms
Linked Lists
Performance
5 kyu
Human Readable Time
144,280BattleRattle
Date Time
Mathematics
Algorithms
5 kyu
Josephus Permutation
15,816GiacomoSorbi
Mathematics
Permutations
Algorithms
Combinatorics
3 kyu
Make a spiral
14,757Bugari
Algorithms
Arrays
Logic
3 kyu
Esolang Interpreters #4 - Boolfuck Interpreter
2,022donaldsebleung
Esoteric Languages
Interpreters
Algorithms
Tutorials
4 kyu
Boggle Word Checker
3,606evan-eleven
Arrays
Recursion
Puzzles
4 kyu
How many numbers III?
4,087raulbc777
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
4 kyu
Advanced Events
1,601akoptsov
Design Patterns
Event Handling
4 kyu
Dependency Injection
4,279kesheshyan
Regular Expressions
Design Patterns
Object-oriented Programming
Angular
4 kyu
Vigenère Cipher Helper
8,377jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Haskell List Dot Notation
473surtich
Functional Programming
Arrays
Algorithms
6 kyu
Unary function chainer
7,015tpatja
Functional Programming
Fundamentals
Retired
IQ Test (retired)
83,595AlexIsHappy
Fundamentals
Logic
6 kyu
Give me a Diamond
36,870jayeshcp
Strings
ASCII Art
Fundamentals
5 kyu
Rot13
92,730Rubikan
Ciphers
Fundamentals
6 kyu
Fibonacci, Tribonacci and friends
13,329GiacomoSorbi
Arrays
Lists
Number Theory
Fundamentals
6 kyu
String Evaluation
486sataman
Strings
Algorithms
6 kyu
Longest alphabetical substring
3,109Avanta
Fundamentals
Strings
7 kyu
Complementary DNA
225,401JustyFY
Strings
Fundamentals
7 kyu
Credit Card Mask
190,331samranjbari
Strings
Algorithms
7 kyu
Isograms
256,415chunjef
Strings
Fundamentals
7 kyu
Mumbling
231,156g964
Fundamentals
Strings
Puzzles
7 kyu
Vowel Count
418,411jayeshcp
Strings
Fundamentals
7 kyu
Highest and Lowest
300,702Deantwo
Fundamentals
Strings
8 kyu
Lexical this
2,777matt c
Fundamentals
8 kyu
Playing with cubes II
7,985Jotha
Fundamentals
Object-oriented Programming
5 kyu
Simple Pig Latin
164,411user2505876
Regular Expressions
Algorithms
5 kyu
Moving Zeros To The End
181,325xcthulhu
Arrays
Sorting
Algorithms
5 kyu
RGB To Hex Conversion
133,965jhoffner
Algorithms
6 kyu
Help the bookseller !
29,693g964
Fundamentals
Algorithms
6 kyu
Tribonacci Sequence
155,074GiacomoSorbi
Number Theory
Arrays
Lists
Fundamentals
6 kyu
The Supermarket Queue
52,124mattlub
Arrays
Fundamentals
6 kyu
Multiples of 3 or 5
428,225jhoffner
Mathematics
Algorithms
6 kyu
Split Strings
158,163jhoffner
Regular Expressions
Strings
Algorithms
6 kyu
Highest Scoring Word
100,823PG1
Fundamentals
Strings
Arrays
6 kyu
Build Tower
101,8548fdafs2
Strings
ASCII Art
Fundamentals
6 kyu
Which are in?
80,303g964
Arrays
Lists
Strings
Refactoring
6 kyu
Break camelCase
120,720hakt
Strings
Fundamentals
Retired
Character Frequency (retired)
6,074MysteriousMagenta
Fundamentals
Strings
8 kyu
Drink about
48,619darlanmendonca
Fundamentals
8 kyu
Triple Trouble
20,132G0ldenSp00n
Puzzles
8 kyu
Total amount of points
110,871petrosernivka
Fundamentals
Arrays
Strings
8 kyu
A wolf in sheep's clothing
35,552jkempster34
Fundamentals
Arrays
7 kyu
Check the exam
31,809Dmitry Kudla
Fundamentals
Arrays
7 kyu
Are the numbers in order?
29,742donaldsebleung
Fundamentals
Mathematics
Algorithms
8 kyu
Collatz Conjecture (3n+1)
14,378Goncalerta
Fundamentals
Algorithms
Mathematics
8 kyu
Is this my tail?
27,727PG1
Debugging
8 kyu
A Strange Trip to the Market
15,591sergarrick
Regular Expressions
Strings
Fundamentals
8 kyu
Who is going to pay for the wall?
14,565mamafrantz
Fundamentals
Strings
8 kyu
Capitalization and Mutability
39,811kolohelios
Strings
Debugging
5 kyu
Caesar Cipher Helper
4,947eugene-bulkin
Ciphers
Object-oriented Programming
Strings
Algorithms
5 kyu
PaginationHelper
40,375jhoffner
Object-oriented Programming
Arrays
Algorithms
5 kyu
Lazy Repeater
7,573nklein
Iterators
Algorithms
5 kyu
Vector class
8,587eugene-bulkin
Object-oriented Programming
Algorithms
Linear Algebra
5 kyu
Simple Events
5,761akoptsov
Design Patterns
Event Handling
Fundamentals
8 kyu
Bin to Decimal
32,426wichu
Binary
Fundamentals
8 kyu
Sum of positive
313,920JbPasquier
Arrays
Fundamentals
8 kyu
CSV representation of array
19,169Dmitry Kudla
Fundamentals
Arrays
Strings
8 kyu
String cleaning
25,940mkelty
Regular Expressions
Fundamentals
Strings
Retired
Man in the west (retired)
7,971vaca_gare
Fundamentals
8 kyu
Return Negative
348,975Deantwo
Fundamentals
8 kyu
Array plus array
87,153Dmitry Kudla
Fundamentals
Arrays
Debugging
8 kyu
Even or Odd
532,944suuuzi
Mathematics
Fundamentals
8 kyu
Do you speak "English"?
17,952tyeung2017
Fundamentals
8 kyu
ASCII Total
13,209user3220651
Fundamentals
8 kyu
Find the Remainder
27,193constablebrew
Mathematics
Fundamentals
Draft
A function within a function
13,610amrdraz
Status:Draft
Estimated Rank:
7 kyu
Fundamentals
8 kyu
Calculate average
164,061wichu
Fundamentals
Arrays
6 kyu
Counting Duplicates
232,395kgashok
Strings
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,719junthecoder
Fundamentals
Algorithms
Strings
Parsing
5 kyu
Regex Password Validation
28,615EricFreeman
Regular Expressions
Fundamentals