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Train Now

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
7 kyu
String Reordering
7,808user3010812
Fundamentals
Strings
Lists
8 kyu
Remove duplicates from list
37,222wichu
Fundamentals
Arrays
Lists
7 kyu
Unpacking Arguments
12,916user578387
Functional Programming
Fundamentals
8 kyu
A Strange Trip to the Market
15,705sergarrick
Regular Expressions
Strings
Fundamentals
7 kyu
The 'spiraling' box
1,729brodiemark
Arrays
Fundamentals
8 kyu
Classy Classes
17,430matt c
Fundamentals
Object-oriented Programming
8 kyu
Broken Counter
6,773BattleRattle
Debugging
Object-oriented Programming
8 kyu
Classy Extentions
11,415matt c
Fundamentals
Object-oriented Programming
8 kyu
SpeedCode #3 × Fun with ES6 Classes #5 - Dogs and Classes
3,055donaldsebleung
Object-oriented Programming
Refactoring
Puzzles
8 kyu
Barking mad
11,112niknmix
Fundamentals
Object-oriented Programming
7 kyu
Thinkful - Object Drills: Quarks
3,705Grae-Drake
Fundamentals
Object-oriented Programming
7 kyu
JavaScript class-like objects
10,796jhoffner
Object-oriented Programming
Fundamentals
7 kyu
Building blocks
12,468NaMe613
Object-oriented Programming
Fundamentals
7 kyu
What a "Classy" Song
4,944FurgieWurgie
Fundamentals
Object-oriented Programming
8 kyu
Playing with cubes II
8,391Jotha
Fundamentals
Object-oriented Programming
7 kyu
Fun with ES6 Classes #4 - Cubes and Setters
5,420donaldsebleung
Fundamentals
Object-oriented Programming
7 kyu
Fun with ES6 Classes #2 - Animals and Inheritance
13,486donaldsebleung
Fundamentals
Object-oriented Programming
7 kyu
Refactored Greeting
11,521jhoffner
Object-oriented Programming
Refactoring
8 kyu
Basic subclasses - Adam and Eve
18,629hansrusten
Fundamentals
Object-oriented Programming
7 kyu
Combine objects
9,172matthewglover
Arrays
Fundamentals
8 kyu
Take an Arrow to the knee, Functionally
13,951matt c
Arrays
Strings
Fundamentals
7 kyu
Colour Association
9,489nogainbar
Fundamentals
6 kyu
Primorial Of a Number
6,918MrZizoScream
Fundamentals
Arrays
Number Theory
7 kyu
Coding Meetup #5 - Higher-Order Functions Series - Prepare the count of languages
8,028PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
7 kyu
Find Count of Most Frequent Item in an Array
12,665Fosna
Data Structures
Fundamentals
7 kyu
Palindrome Pairs
709smepple
Lists
Strings
Fundamentals
7 kyu
Sum The Array
1,164vasekhlav
Arrays
Fundamentals
7 kyu
GA-DE-RY-PO-LU-KI cypher
2,717dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Map over a list of lists
2,164Paul Robertson
Fundamentals
Lists
6 kyu
"this" is an other problem
3,002ZozoFouchtra
Object-oriented Programming
Debugging
Language Features