Kata Library
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
Algorithms
9
Arrays
2
Domain Specific Languages
1
Functional Programming
3
Fundamentals
4
Mathematics
1
Networks
1
Object-oriented Programming
1
Parsing
2
Puzzles
3
Regular Expressions
1
Sorting
1
Streams
14
Strings
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
14 Kata Found
4 kyu
Functional streams
771
muesli4
2 Issues Reported
Streams
Functional Programming
Algorithms
4 kyu
One-Semicolon Stream Zipping
22
phantamanta44
1 Issue Reported
Algorithms
Streams
Puzzles
4 kyu
Set Closure Generator
254
ecolban
Streams
Algorithms
5 kyu
One-Semicolon Fibonacci Stream
158
phantamanta44
Algorithms
Streams
Puzzles
Beta
s-array language
3
A-Z
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Arrays
Domain Specific Languages
Streams
5 kyu
Rescue a Ship on the Integer Sea
16
glebec
Mathematics
Streams
Puzzles
Algorithms
Beta
Creating a custom PHP stream wrapper
5
rubs33
Status:
Testing & feedback needed
Estimated Rank:
7 kyu
Streams
Algorithms
5 kyu
Gigabyte Streaming
61
jcsahnwaldt
Streams
Fundamentals
5 kyu
Gigabyte Storage
34
jcsahnwaldt
Streams
Fundamentals
6 kyu
Triple Sorting - Sort & Stringify a list by 3 attributes
785
pojo
Streams
Strings
Algorithms
Arrays
Sorting
Beta
Network Programming: Fun with Telnet
16
provector
3 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
6 kyu
Networks
Streams
Parsing
Object-oriented Programming
Functional Programming
Fundamentals
Beta
FloatStream
8
wthit56
2 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Regular Expressions
Streams
Parsing
Fundamentals
5 kyu
Java Functional Programming (Part 4: Row Row Row Your Boat, Gently Down the...)
286
Azuaron
Streams
Functional Programming
Algorithms
5 kyu
Streams - endless arrays
339
scheffield
Streams
Algorithms
Confirm
Collect:
undefined
Loading collection data...