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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
Kebabize
12,709user4316848
Fundamentals
Strings
Regular Expressions
6 kyu
Sort the odd
105,361fyvfyv
Fundamentals
Arrays
Sorting
6 kyu
Your order, please
166,055iamstone
Strings
Fundamentals
6 kyu
Title Case
36,889user527539
Strings
Fundamentals
6 kyu
Data Reverse
23,839sataman
Arrays
Fundamentals
6 kyu
Highest Scoring Word
97,998PG1
Fundamentals
Strings
Arrays
6 kyu
Generic numeric template formatter
1,292GiacomoSorbi
Regular Expressions
Strings
Algorithms
6 kyu
Number Format
3,087cnawaraj
Regular Expressions
Fundamentals
Retired
Format a string of names like 'Bart, Lisa & Maggie'. (retired)
71,234weavermedia
Fundamentals
Strings
Data Types
Formatting
Algorithms
Logic
6 kyu
Unique In Order
181,289pinelopi
Algorithms
Fundamentals
6 kyu
Find the unique number
142,526isqua
Fundamentals
Algorithms
Arrays
6 kyu
Array.diff
279,163marcinbunsch
Arrays
Fundamentals
Algorithms
6 kyu
Persistent Bugger.
194,488joh_pot
Fundamentals
Mathematics
6 kyu
extract portion of file name
8,051Javatlacati
Regular Expressions
Fundamentals
5 kyu
Human Readable Time
140,267BattleRattle
Date Time
Mathematics
Algorithms
6 kyu
Sort two arrays
454myjinxin2015
Puzzles
Fundamentals
Sorting
Algorithms
Arrays
6 kyu
DefaultList
713beniolenio
Fundamentals
6 kyu
Break camelCase
116,285hakt
Strings
Fundamentals
6 kyu
IPv4 to int32
10,613sahglie
Networks
Algorithms
Bits
Binary
Fundamentals
6 kyu
Get root property name
437kodejuice
Data Structures
Fundamentals
6 kyu
Consecutive strings
77,856g964
Fundamentals
6 kyu
Prize Draw
6,934g964
Fundamentals
Strings
Sorting
6 kyu
Sorting by bits
9,035kodejuice
Logic
Arrays
Algorithms
Data Structures
Fundamentals
Bits
Binary
Sorting
6 kyu
Simple Simple Simple String Expansion
3,418alansun
Strings
Regular Expressions
Fundamentals
6 kyu
zipWith
6,676JohanWiltink
Lists
Arrays
Functional Programming
Algorithms
5 kyu
Count IP Addresses
27,701xDranik
Algorithms
5 kyu
Vector Class
844Detry322
Fundamentals
Object-oriented Programming
6 kyu
Vector Affinity
1,599keithhamilton
Data Structures
Algorithms
6 kyu
Coordinates Validator
6,867louy
Regular Expressions
Algorithms
5 kyu
Scramblies
54,141joh_pot
Strings
Performance
Algorithms
6 kyu
Sequence generator
809NaMe613
Fundamentals
6 kyu
Number Shortening Filter
936GiacomoSorbi
Angular
Algorithms
6 kyu
Find within array
3,507kylehill
Arrays
Functional Programming
Fundamentals
5 kyu
Convert A Hex String To RGB
14,653Krxtopher
Parsing
Strings
Algorithms
5 kyu
RGB To Hex Conversion
129,905jhoffner
Algorithms
6 kyu
Function Composition
13,475user578387
Functional Programming
Fundamentals
6 kyu
Calculate String Rotation
7,252obnounce
Strings
Arrays
Algorithms
5 kyu
Function Overloading for Types
88Kacarott
Decorator
Language Features
Metaprogramming
5 kyu
Self-closing Cookie Jar
194ecolban
Object-oriented Programming
Fundamentals
5 kyu
Lazy Repeater
7,374nklein
Iterators
Algorithms
5 kyu
Vector class
8,380eugene-bulkin
Object-oriented Programming
Algorithms
Linear Algebra
5 kyu
Land perimeter
4,791St3f4n
Fundamentals
5 kyu
A Chain adding function
28,315gelus
Mathematics
Functional Programming
Puzzles
5 kyu
Convert all the cases!
1,401AJFarmar
Strings
Regular Expressions
Algorithms
5 kyu
Function Addition
192wookie184
Fundamentals
6 kyu
Split Strings
152,949jhoffner
Regular Expressions
Strings
Algorithms
6 kyu
Count characters in your string
91,850riston
Strings
Fundamentals
6 kyu
Detect Pangram
178,613anindyabd
Strings
Data Structures
Fundamentals
6 kyu
Which filetypes are you using the most?
951ok-john
Fundamentals
Algorithms
Strings
Arrays
5 kyu
Limited number of instances
85FArekkusu
Object-oriented Programming
Metaprogramming
6 kyu
Schrödinger's Boolean
3,336docgunthrop
Language Features
Metaprogramming
Puzzles
6 kyu
Vowel Shifting
1,357user5036852
Strings
Regular Expressions
Algorithms
6 kyu
Shifted cycles
167eugene-katsevman
Iterators
Fundamentals
6 kyu
Get a User's Honor
323user2514386
Strings
Regular Expressions
Fundamentals
6 kyu
JSON Class Decorator
423SquishyStrawberry
Fundamentals
Object-oriented Programming
6 kyu
Determine the date by the day number
1,513LarisaOvchinnikova
Fundamentals
Date Time
Algorithms
5 kyu
Calculating with Functions
80,641BattleRattle
Functional Programming
6 kyu
Expected Type Decorator
473filipkonieczny
Fundamentals
Design Patterns
Object-oriented Programming
5 kyu
flatten()
4,394jhoffner
Arrays
Algorithms
5 kyu
Matching And Substituting
2,256g964
Fundamentals
5 kyu
Directory tree
89ecolban
Fundamentals
5 kyu
Return substring instance count - 2
3,002ineiti
Strings
Regular Expressions
Algorithms
5 kyu
Domain name validator
538Disassembler0
Regular Expressions
Strings
Fundamentals
5 kyu
Simple Events
5,723akoptsov
Design Patterns
Event Handling
Fundamentals
5 kyu
Street Fighter 2 - Character Selection - Part 2
1,969mmalkavian
Arrays
Lists
Fundamentals
Graph Theory
5 kyu
Binary search tree validation
949plastic
Trees
Recursion
Data Structures
Algorithms