Kata Library: JavaScript Practice
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algebra
1
Algorithms
26
Arrays
26
Combinatorics
1
Dynamic Programming
1
Fundamentals
3
Games
5
Geometry
1
Logic
2
Mathematics
7
Matrix
1
Object-oriented Programming
1
Parsing
1
Performance
4
Puzzles
26
Restricted
2
Simulation
1
Sorting
3
Strings
2
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
26 Kata Found
5 kyu
What doesn't belong to these?
261
user5036852
Mathematics
Arrays
Puzzles
Algorithms
4 kyu
Validate Sudoku with size `NxN`
9,820
cbmono
13 Issues Reported
Arrays
Puzzles
Algorithms
Object-oriented Programming
6 kyu
Simple Fun #92: Digit Difference Sort
269
myjinxin2015
3 Issues Reported
Puzzles
Arrays
Algorithms
Sorting
6 kyu
Guess the array
350
ice1000
Puzzles
Algorithms
Arrays
6 kyu
Playing With Toy Blocks ~ Can you build a 4x4 square?
763
rowcased
Logic
Arrays
Games
Puzzles
Geometry
Algorithms
2 kyu
6 By 6 Skyscrapers
2,538
FrankK
4 Issues Reported
Mathematics
Puzzles
Games
Arrays
Matrix
Algorithms
5 kyu
[Code Golf] Array Normalisation Puzzle
12
dfhwze
Puzzles
Algorithms
Arrays
Restricted
Mathematics
6 kyu
Masquerade Waiting Line
418
cdsa142
Algorithms
Arrays
Puzzles
Beta
Balanced centrifuge configurator
6
dfhwze
Status:
Ranking feedback needed
Estimated Rank:
1 kyu
Algorithms
Puzzles
Mathematics
Combinatorics
Arrays
Performance
Algebra
Dynamic Programming
7 kyu
If you can't beat 'em, join 'em!
776
megawatt
2 Issues Reported
Fundamentals
Arrays
Algorithms
Puzzles
2 kyu
Transforming Maze Solver
413
docgunthrop
2 Issues Reported
Algorithms
Arrays
Performance
Puzzles
6 kyu
Perfect Queues
108
dfhwze
Algorithms
Arrays
Puzzles
Performance
6 kyu
[Code Golf] Spinning Wheels
30
dfhwze
Puzzles
Algorithms
Arrays
Mathematics
Restricted
5 kyu
Galahad's Quests: Escape the Dungeon
27
dfhwze
Puzzles
Algorithms
Arrays
Performance
6 kyu
Controlled Detonation Safety
147
Kooloog
Arrays
Algorithms
Puzzles
5 kyu
Wood Cut
196
myjinxin2015
2 Issues Reported
Puzzles
Algorithms
Arrays
5 kyu
myjinxin katas #001 : Rotate, Remove, Return
335
myjinxin2015
3 Issues Reported
Puzzles
Algorithms
Arrays
6 kyu
Sort two arrays
474
myjinxin2015
2 Issues Reported
Puzzles
Fundamentals
Sorting
Algorithms
Arrays
7 kyu
Chuck Norris IV - Bearded Fist
774
PG1
1 Issue Reported
Fundamentals
Algorithms
Arrays
Puzzles
6 kyu
Hexagon Beam Max Sum
323
docgunthrop
Puzzles
Arrays
Algorithms
4 kyu
Queue Battle
111
docgunthrop
Arrays
Puzzles
Games
Algorithms
Beta
Simple Fun #392: Count Robot
6
myjinxin2015
1 Issue Reported
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Puzzles
Mathematics
Arrays
Algorithms
5 kyu
Snake Collision
137
kodejuice
1 Issue Reported
Arrays
Games
Algorithms
Simulation
Puzzles
5 kyu
Shrink the maze!
64
Cerbrus
Strings
Algorithms
Logic
Puzzles
Arrays
Parsing
Beta
Scrambled Numbers Sorting
18
CamWalker
2 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Strings
Arrays
Algorithms
Puzzles
Sorting
5 kyu
Stacked Deck (create a cheater's deck of cards)
280
Anthony Terra
1 Issue Reported
Mathematics
Arrays
Algorithms
Games
Puzzles
Confirm
Collect:
undefined
Loading collection data...