Kata Library: Ruby 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
Algorithms
19
Arrays
2
Ciphers
15
Cryptography
30
Fundamentals
14
Games
1
Performance
1
Puzzles
6
Regular Expressions
1
Security
8
Strings
11
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
30 Kata Found
7 kyu
Decoding a message
2,895
samhstn
Puzzles
Algorithms
Cryptography
Security
Games
7 kyu
Mirroring cipher
829
user8580805
Strings
Cryptography
Security
Algorithms
6 kyu
Keyword Cipher
1,296
user8580805
Cryptography
Strings
Algorithms
5 kyu
Break the Caesar!
853
kingcobra
1 Issue Reported
Ciphers
Cryptography
Fundamentals
6 kyu
Scooby Doo Puzzle
312
adrian.eyre
2 Issues Reported
Puzzles
Cryptography
Algorithms
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 3 - Missing key
611
dcieslak
1 Issue Reported
Fundamentals
Ciphers
Cryptography
5 kyu
Coding with Squared Strings
2,110
g964
1 Issue Reported
Fundamentals
Strings
Ciphers
Cryptography
6 kyu
Polybius square cipher - encode
1,337
tiriana
Cryptography
Ciphers
Algorithms
6 kyu
One down
1,205
WesleyYoung
1 Issue Reported
Strings
Algorithms
Cryptography
Puzzles
6 kyu
Rotation Cipher Cracker
926
NicholasSeward
1 Issue Reported
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
Number encrypting: cypher
1,168
dgrcode
Fundamentals
Strings
Ciphers
Cryptography
7 kyu
GA-DE-RY-PO-LU-KI cypher
2,850
dcieslak
1 Issue Reported
Fundamentals
Ciphers
Cryptography
6 kyu
Cryptography #1 - Viva Cesare
800
Dentzil
Fundamentals
Cryptography
Algorithms
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 2
1,087
dcieslak
1 Issue Reported
Fundamentals
Ciphers
Cryptography
6 kyu
Digital cypher vol 3 - missing key
1,065
dcieslak
1 Issue Reported
Fundamentals
Ciphers
Cryptography
5 kyu
Second Variation on Caesar Cipher
2,001
g964
2 Issues Reported
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
3,335
dcieslak
Fundamentals
Ciphers
Cryptography
6 kyu
Crack the PIN
3,044
zLuki
Algorithms
Cryptography
7 kyu
Digital cypher
8,303
dcieslak
Fundamentals
Ciphers
Cryptography
3 kyu
Rail Fence Cipher: Encoding and Decoding
9,034
darrentburgess
3 Issues Reported
Algorithms
Ciphers
Cryptography
Strings
Security
6 kyu
Simple Encryption #1 - Alternating Split
29,623
user5036852
3 Issues Reported
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Encrypt this!
23,542
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
7 kyu
The Barksdale Code
2,751
milesflo
2 Issues Reported
Cryptography
Puzzles
6 kyu
Real Password Cracker
552
anter69
Security
Cryptography
Algorithms
7 kyu
Decrypt this school cipher
455
isqua
1 Issue Reported
Cryptography
Fundamentals
Strings
Algorithms
6 kyu
Caesar Cipher Encryption - Variation
834
patrickwalkowicz
Algorithms
Cryptography
3 kyu
Alphametics Solver
440
docgunthrop
Puzzles
Performance
Cryptography
Algorithms
6 kyu
ROT13 variant cipher
659
user8580805
1 Issue Reported
Cryptography
Security
Strings
Algorithms
Beta
Polybius Square
36
chipit24
4 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
7 kyu
Cryptography
Algorithms
Beta
Playfair cipher
7
durfi
1 Issue Reported
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Ciphers
Cryptography
Security
Strings
Algorithms
Confirm
Collect:
undefined
Loading collection data...