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
7
Fundamentals
4
Mathematics
1
Parsing
12
Regular Expressions
12
Strings
8
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
12 Kata Found
7 kyu
Hashtaggery
837
Lordnibbler
Regular Expressions
Fundamentals
Strings
Parsing
6 kyu
Linux history and `!` command. Series#5 The `!?string` command
299
nbeck
1 Issue Reported
Strings
Parsing
Regular Expressions
Algorithms
6 kyu
Linux history and `!` command. Series#4 The `!string` command
292
nbeck
3 Issues Reported
Strings
Parsing
Regular Expressions
Algorithms
6 kyu
Linux history and `!` command. Series#3 The `!-n` command
300
nbeck
3 Issues Reported
Strings
Parsing
Regular Expressions
Algorithms
6 kyu
Linux history and `!` command. Series#2 The `!n` command
411
nbeck
Strings
Parsing
Regular Expressions
Algorithms
6 kyu
Linux history and `!` command. Series#1 The `!!` command
639
nbeck
Strings
Parsing
Regular Expressions
Algorithms
4 kyu
Simplifying multilinear polynomials
4,978
SleepingCode
6 Issues Reported
Mathematics
Strings
Regular Expressions
Parsing
Fundamentals
4 kyu
Breadcrumb Generator
4,714
GiacomoSorbi
1 Issue Reported
Parsing
Regular Expressions
Algorithms
6 kyu
Acronym Buster
546
pbywater
5 Issues Reported
Regular Expressions
Parsing
Strings
Algorithms
5 kyu
Extract the domain name from a URL
84,745
xianpants
13 Issues Reported
Parsing
Regular Expressions
6 kyu
Parse the log
426
IVBakker
4 Issues Reported
Regular Expressions
Parsing
Fundamentals
7 kyu
Parsing Commandline Arguments
323
btaitelb
2 Issues Reported
Parsing
Regular Expressions
Fundamentals
Confirm
Collect:
undefined
Loading collection data...