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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
Don't rely on luck.
11,889JoshBrodieNZ
Games
Puzzles
7 kyu
Echo
365OpenByte
Puzzles
Strings
Games
Draft
Return 2019 but without numbers or letters!
63Whimpers
Status:Draft
Estimated Rank:
4 kyu
7 kyu
Stop the loop after n seconds
461jamad
Date Time
Debugging
7 kyu
Password Hashes
4,577user5854572
Security
Fundamentals
Beta
Create a password hashing function.
32int3_0xcc
Status:Testing & feedback needed
Estimated Rank:
4 kyu
Cryptography
Security
Mathematics
Algorithms
6 kyu
Hex to base64
341e.mihaylin
Strings
Algorithms
5 kyu
A Chain adding function
27,615gelus
Mathematics
Functional Programming
Puzzles
8 kyu
Yield to the Block
2,766agram
Functional Programming
Fundamentals
5 kyu
Calculating with Functions
77,048BattleRattle
Functional Programming
6 kyu
Schrödinger's Boolean
3,253docgunthrop
Language Features
Metaprogramming
Puzzles
6 kyu
The Desperate Rocket Scientist
1,135Cito
Arrays
Puzzles
4 kyu
Method Lockdown
904JoshBrodieNZ
Metaprogramming
6 kyu
Mnemonic Lookup
91AniaMakes
Fundamentals
6 kyu
None shall pass
1,336adriaanbaelus
Security
Puzzles
8 kyu
Not so black box
2,944g-sam
Puzzles
5 kyu
Pipelining and composing functions
511user5363957
Functional Programming
Fundamentals
5 kyu
Concatenating functions
2,005scheffield
Functional Programming
Fundamentals
6 kyu
hidden key
118matt c
Fundamentals
5 kyu
Simple Time Bomb
2,340constablebrew
Reverse Engineering
Games
Puzzles
6 kyu
sum function
584skibinska
Fundamentals
5 kyu
Javascript Magic Function
522candrabeqx
Language Features
Functional Programming
8 kyu
Generate user links
3,976matt c
Puzzles
7 kyu
First-Class Function Factory
6,455otajor
Fundamentals
Functional Programming
Arrays
8 kyu
!a == a ?!
2,851arhigod
Fundamentals
Language Features
7 kyu
Quine
182gkucmierz
Puzzles
Retired
easy peasy - smallest input (retired)
17Tefferson
Status:Retired
Estimated Rank:
5 kyu
Puzzles
Algorithms
Mathematics
Restricted
Retired
Find a way to cheat the Codewars testing system (retired)
15tianshuo
Status:Retired
Estimated Rank:
1 kyu
Puzzles
Security
Bugs
Retired
Say "Hello World" JS Style and say even more! (retired)
24pzurowski
Status:Retired
Estimated Rank:
4 kyu
Fundamentals
Functions
Control Flow
Basic Language Features
Advanced Language Features
Retired
Convert Symbol to Array (retired)
88GeorgeSeeger
Status:Retired
Estimated Rank:
7 kyu
Arrays
Fundamentals
Retired
Know your language inner workings (retired)
11pocesar
Status:Retired
Estimated Rank:
6 kyu
Fundamentals
Numbers
Data Types
Retired
Easy virtue (retired)
7maximblack
Status:Retired
Estimated Rank:
4 kyu
Puzzles
Retired
May a == 1 && a == 2 && a == 3 (retired)
6Anonymous-Qsh
Status:Retired
Estimated Rank:
8 kyu
Fundamentals
Retired
JavaScript Wizardry (retired)
6ThibaultCarmantrand
Status:Retired
Estimated Rank:
6 kyu
Fundamentals
Retired
Equal or Not Equal: that is the question! (retired)
5AndrasG
Status:Retired
Estimated Rank:
4 kyu
Puzzles
Retired
Finicky Integers #1 (retired)
5funnbot
Status:Retired
Estimated Rank:
6 kyu
Puzzles
Numbers
Data Types
Integers
Games
7 kyu
Strict Mode
455trashy_incel
Language Features
6 kyu
Spread number
244linisnie
Fundamentals
5 kyu
Compose functions (T Combinator)
2,228kylehill
Functional Programming
Fundamentals
5 kyu
Not Quine
335_nderscore
Algorithms
6 kyu
Array.isArray
638abednego
Arrays
Algorithms
6 kyu
Once
5,769osuushi
Functional Programming
Fundamentals
6 kyu
Combinator Flip
3,344JTipp
Functional Programming
Fundamentals
6 kyu
multiFilter
2,642gperales
Functional Programming
Fundamentals
5 kyu
Lazy evaluation
1,779surtich
Functional Programming
5 kyu
Lazy Chain
244dfrown123
Functional Programming
Fundamentals
7 kyu
Run your String
1,532VoodooLab
Strings
Fundamentals
7 kyu
Number-like counter
2,219osuushi
Fundamentals
Object-oriented Programming
6 kyu
"Stringing"+"Me"+"Along"
6,236shinchy
Functional Programming
Fundamentals
6 kyu
Function Composition
13,356user578387
Functional Programming
Fundamentals
6 kyu
Unary function chainer
6,866tpatja
Functional Programming
Fundamentals
5 kyu
Replicate `new`
6,881glebec
Object-oriented Programming
Fundamentals
5 kyu
Simple Events
5,649akoptsov
Design Patterns
Event Handling
Fundamentals
4 kyu
Dependency Injection
4,188kesheshyan
Regular Expressions
Design Patterns
Object-oriented Programming
Angular
Beta
Run n times
27bellentuck
Status:Waiting for issues to be resolved
Estimated Rank:
7 kyu
Fundamentals
6 kyu
Bag#every?
753saterus
Functional Programming
Fundamentals
6 kyu
Metaprogramming Conjurer
575Lordnibbler
Metaprogramming
Fundamentals
5 kyu
Phone my kids
1,146ineiti
Metaprogramming
Object-oriented Programming
Fundamentals