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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
Sort the odd
109,028fyvfyv
Fundamentals
Arrays
Sorting
7 kyu
Don't give me five!
41,524user5036852
Mathematics
Arrays
Algorithms
4 kyu
Pyramid Slide Down
18,293rodentrabies
Algorithms
Dynamic Programming
6 kyu
Array Helpers
23,118BattleRattle
Arrays
Fundamentals
Object-oriented Programming
4 kyu
Boggle Word Checker
3,606evan-eleven
Arrays
Recursion
Puzzles
1 kyu
Mine Sweeper
1,253myjinxin2015
Puzzles
Game Solvers
7 kyu
After(?) Midnight
1,183Aquila
Date Time
Algorithms
6 kyu
multiFilter
2,693gperales
Functional Programming
Fundamentals
4 kyu
Validate Sudoku with size `NxN`
9,423cbmono
Arrays
Puzzles
Algorithms
Object-oriented Programming
4 kyu
Snail
76,710stevenbarragan
Arrays
Algorithms
4 kyu
Ranking Poker Hands
3,346FrankK
Games
Algorithms
Object-oriented Programming
3 kyu
Sudoku Solver
14,304pineappleclock
Games
Game Solvers
Algorithms
6 kyu
Reverse polish notation calculator
11,394vgrichina
Algorithms
Mathematics
Interpreters
Parsing
Strings
1 kyu
Mystery function #2
182tianshuo
Algorithms
Puzzles
Security
Games
Mathematics
Bits
5 kyu
GPS Navigation
492jakber
Algorithms
Graph Theory
2 kyu
Evaluate mathematical expression
9,577ankr
Mathematics
Parsing
Algorithms
6 kyu
Convert string to camel case
193,969jhoffner
Regular Expressions
Algorithms
Strings
6 kyu
Duplicate Arguments
4,374lunitik
Algorithms
6 kyu
Valid Phone Number
19,911xDranik
Regular Expressions
Algorithms
5 kyu
String incrementer
49,207parceval
Regular Expressions
Strings
7 kyu
Reflection in PHP #1 - Introduction
305donaldsebleung
Object-oriented Programming
Reverse Engineering
Fundamentals
Tutorials
Retired
Format a string of names like 'Bart, Lisa & Maggie'. (retired)
71,234weavermedia
Fundamentals
Strings
Data Types
Formatting
Algorithms
Logic
7 kyu
Array Mappings
2,132donaldsebleung
Arrays
Object-oriented Programming
Fundamentals
1 kyu
Functional SQL
2,741surtich
Functional Programming
Algorithms
4 kyu
Currying vs. Partial Application
2,655surtich
Functional Programming
5 kyu
Hello W... wait what?
1,908MentalAtom
Puzzles
Algorithms
6 kyu
Functional Lists
1,035nklein
Functional Programming
Lists
Data Structures
Algorithms
7 kyu
Move Zeros
1,120KK20994
Arrays
Fundamentals
6 kyu
Highest Rank Number in an Array
17,170KK20994
Arrays
Fundamentals
6 kyu
Array#reduce
4,374user578387
Functional Programming
Algorithms
5 kyu
Pick peaks
28,619frenetic_be
Arrays
Algorithms
6 kyu
Coding Meetup #16 - Higher-Order Functions Series - Ask for missing details
2,458PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
6 kyu
Where is my parent!?(cry)
6,976smolen
Fundamentals
5 kyu
Robby, the robot
483BattleRattle
Matrix
Algorithms
Graph Theory
5 kyu
Decorator Pattern
452surtich
Design Patterns
Decorator
Object-oriented Programming
Fundamentals
Retired
Algebraic Data Types (retired)
370surtich
Algorithms
Functional Programming
Declarative Programming
Programming Paradigms
2 kyu
Simple SQL Engine
497SteveRuble
SQL
Parsing
Sets
Databases
Algorithms
4 kyu
Dependency Injection
4,279kesheshyan
Regular Expressions
Design Patterns
Object-oriented Programming
Angular
5 kyu
Best travel
20,736g964
Fundamentals