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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.
12,146JoshBrodieNZ
Games
Puzzles
7 kyu
Echo
374OpenByte
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
490jamad
Date Time
Debugging
7 kyu
Password Hashes
4,702user5854572
Security
Fundamentals
Beta
Create a password hashing function.
35int3_0xcc
Status:Testing & feedback needed
Estimated Rank:
4 kyu
Cryptography
Security
Mathematics
Algorithms
6 kyu
Hex to base64
356e.mihaylin
Strings
Algorithms
5 kyu
A Chain adding function
28,505gelus
Mathematics
Functional Programming
Puzzles
8 kyu
Yield to the Block
2,775agram
Functional Programming
Fundamentals
5 kyu
Calculating with Functions
81,596BattleRattle
Functional Programming
6 kyu
Schrödinger's Boolean
3,352docgunthrop
Language Features
Metaprogramming
Puzzles
6 kyu
The Desperate Rocket Scientist
1,144Cito
Arrays
Puzzles
4 kyu
Method Lockdown
910JoshBrodieNZ
Metaprogramming
6 kyu
Mnemonic Lookup
95AniaMakes
Fundamentals
6 kyu
None shall pass
1,350adriaanbaelus
Security
Puzzles
8 kyu
Not so black box
3,009g-sam
Puzzles
5 kyu
Pipelining and composing functions
522user5363957
Functional Programming
Fundamentals
5 kyu
Concatenating functions
2,026scheffield
Functional Programming
Fundamentals
6 kyu
hidden key
123matt c
Fundamentals
5 kyu
Simple Time Bomb
2,363constablebrew
Reverse Engineering
Games
Puzzles
6 kyu
sum function
598skibinska
Fundamentals
5 kyu
Javascript Magic Function
530candrabeqx
Language Features
Functional Programming
8 kyu
Generate user links
4,186matt c
Puzzles
7 kyu
First-Class Function Factory
6,701otajor
Fundamentals
Functional Programming
Arrays
8 kyu
!a == a ?!
2,957arhigod
Fundamentals
Language Features
7 kyu
Quine
192gkucmierz
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
468trashy_incel
Language Features
6 kyu
Spread number
253linisnie
Fundamentals
5 kyu
Compose functions (T Combinator)
2,259kylehill
Functional Programming
Fundamentals
5 kyu
Not Quine
341_nderscore
Algorithms
6 kyu
Array.isArray
665abednego
Arrays
Algorithms
6 kyu
Once
5,827osuushi
Functional Programming
Fundamentals
6 kyu
Combinator Flip
3,387JTipp
Functional Programming
Fundamentals
6 kyu
multiFilter
2,682gperales
Functional Programming
Fundamentals
5 kyu
Lazy evaluation
1,784surtich
Functional Programming
5 kyu
Lazy Chain
250dfrown123
Functional Programming
Fundamentals
7 kyu
Run your String
1,545VoodooLab
Strings
Fundamentals
7 kyu
Number-like counter
2,249osuushi
Fundamentals
Object-oriented Programming
6 kyu
"Stringing"+"Me"+"Along"
6,780shinchy
Functional Programming
Fundamentals
6 kyu
Function Composition
13,499user578387
Functional Programming
Fundamentals
6 kyu
Unary function chainer
6,989tpatja
Functional Programming
Fundamentals
5 kyu
Replicate `new`
6,908glebec
Object-oriented Programming
Fundamentals
5 kyu
Simple Events
5,737akoptsov
Design Patterns
Event Handling
Fundamentals
4 kyu
Dependency Injection
4,215kesheshyan
Regular Expressions
Design Patterns
Object-oriented Programming
Angular
Beta
Run n times
28bellentuck
Status:Waiting for issues to be resolved
Estimated Rank:
7 kyu
Fundamentals
6 kyu
Bag#every?
756saterus
Functional Programming
Fundamentals
6 kyu
Metaprogramming Conjurer
577Lordnibbler
Metaprogramming
Fundamentals
5 kyu
Phone my kids
1,153ineiti
Metaprogramming
Object-oriented Programming
Fundamentals