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
2
Arrays
1
Date Time
16
Fundamentals
16
Geometry
1
Mathematics
1
Parsing
1
Regular Expressions
3
Strings
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
16 Kata Found
7 kyu
regex validation of 24 hours time.
1,899
daymos
5 Issues Reported
Regular Expressions
Date Time
Fundamentals
7 kyu
Elapsed Seconds
8,662
jhoffner
1 Issue Reported
Date Time
Fundamentals
7 kyu
Find Your Villain Name
4,988
yaphi1
3 Issues Reported
Arrays
Date Time
Fundamentals
6 kyu
The latest clock
2,886
nirgn
Date Time
Fundamentals
Algorithms
8 kyu
Remove the time
18,514
radiocontrolled
3 Issues Reported
Date Time
Parsing
Fundamentals
8 kyu
Is your period late?
11,908
int3_0xcc
Fundamentals
Date Time
7 kyu
Decimal Time Conversion
1,244
Galvlbit
Fundamentals
Algorithms
Date Time
Strings
7 kyu
Can Santa save Christmas?
4,478
zruF
Date Time
Fundamentals
7 kyu
Milk and Cookies for Santa
6,709
xDranik
1 Issue Reported
Date Time
Fundamentals
6 kyu
Pretty date
886
burce
Date Time
Fundamentals
5 kyu
validDate Regex
1,851
wthit56
4 Issues Reported
Date Time
Regular Expressions
Fundamentals
7 kyu
#~For Kids~# d/m/Y -> Day of the week.
973
ALNeneve
Fundamentals
Date Time
Beta
Call Center Call Backs
39
tormod17
5 Issues Reported
Status:
Waiting for issues to be resolved
Fundamentals
Date Time
Regular Expressions
Beta
Event Date Dilemma
23
westonkd
2 Issues Reported
Status:
Testing & feedback needed
Date Time
Fundamentals
7 kyu
Next birth-day of the week finder
1,019
priyankaherur
2 Issues Reported
Date Time
Fundamentals
Beta
Clock Hands
32
rtoal
3 Issues Reported
Status:
Waiting for issues to be resolved
Date Time
Mathematics
Geometry
Fundamentals
Confirm
Collect:
undefined
Loading collection data...