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
5
Arrays
2
Date Time
1
Fundamentals
12
Games
1
Geometry
1
Lists
1
Logic
2
Mathematics
7
Puzzles
13
Refactoring
1
Restricted
30
Strings
8
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
30 Kata Found
6 kyu
File Path Operations
1,744
user2514386
3 Issues Reported
Fundamentals
Strings
Restricted
6 kyu
Sum of Two Integers
5,957
MrZizoScream
8 Issues Reported
Restricted
7 kyu
No ifs no buts
3,215
MichaelSel
Restricted
Fundamentals
6 kyu
One line task: Square Every Digit
1,125
Firefly2002
Puzzles
Games
Restricted
Refactoring
7 kyu
[Code Golf] Compare Two Numbers
138
uttumuttu
Restricted
8 kyu
Name on billboard
20,446
val_alex
5 Issues Reported
Fundamentals
Restricted
Strings
7 kyu
isEven? - Bitwise Series
1,906
MichaelSel
1 Issue Reported
Restricted
Fundamentals
7 kyu
Finding Remainder Without Using '%' Operator
2,705
DivyanshBatham
1 Issue Reported
Mathematics
Restricted
Algorithms
7 kyu
Baby shark lyrics generator
2,690
albertogcmr
2 Issues Reported
Strings
Lists
Fundamentals
Restricted
7 kyu
MOD 256 without the MOD operator
3,267
user5036852
3 Issues Reported
Algorithms
Fundamentals
Logic
Mathematics
Restricted
Puzzles
6 kyu
[Code Golf] Leyland Numbers
142
anter69
Restricted
Puzzles
5 kyu
Find the Missing Number using NAND
39
SagePtr
Logic
Mathematics
Restricted
5 kyu
US Postal Codes
314
anter69
Algorithms
Restricted
6 kyu
XOR string reduction
454
MercQueen
Strings
Mathematics
Restricted
7 kyu
Hello World - Without Strings
4,164
user9079873
Strings
Restricted
Puzzles
8 kyu
5 without numbers !!
37,984
KH!
Restricted
Fundamentals
Puzzles
6 kyu
IP address finder [Code-golf]
761
___i
Strings
Arrays
Restricted
Puzzles
7 kyu
5 without alphanums!!!
714
pkubiak
Puzzles
Restricted
7 kyu
[Code Golf] One Line Task: Pyramid of Spheres
125
polluxCast0r
Mathematics
Geometry
Restricted
Fundamentals
6 kyu
[Code Golf] The Twelve Days of Christmas
186
anter69
Restricted
Puzzles
7 kyu
[Code Golf] A Triangle?
455
elmoiv
Puzzles
Restricted
7 kyu
[Code Golf] Return Odd No Matter What
1,176
ilya_plotnikov
Fundamentals
Restricted
Algorithms
7 kyu
[ Code Golf ] Add 2 values for each
634
jamad
Restricted
Fundamentals
7 kyu
[Code Golf] Length of Month
497
anter69
Restricted
Date Time
Puzzles
3 kyu
One line task: Is the King in check ?
143
Torkel
2 Issues Reported
Restricted
Puzzles
5 kyu
One Line Task: Diamond Creator Pro
141
MercQueen
1 Issue Reported
Strings
Arrays
Mathematics
Puzzles
Restricted
4 kyu
One Line Task: Squirrel And Tree
2,355
myjinxin2015
2 Issues Reported
Puzzles
Restricted
7 kyu
[Code Golf] String to ASCII Character
339
no one
Restricted
Strings
Algorithms
Beta
Multiply Two Numbers Without Integers
294
user7408403
6 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
4 kyu
Mathematics
Restricted
Fundamentals
7 kyu
No Modulo
1,167
sergelerator
4 Issues Reported
Restricted
Fundamentals
Confirm
Collect:
undefined
Loading collection data...