Cool Kata
167495 kyuPnd72
Loading...
Choose Language...
Python
JavaScript
Ruby
CoffeeScript
C#
Java
Haskell
Julia (Beta)
Kotlin
C++
NASM
C
TypeScript
Go
Swift
Groovy
Haxe (Beta)
PHP
R (Beta)
Objective-C (Beta)
Rust
Factor (Beta)
Clojure
Elixir
Shell
COBOL (Beta)
Lua
Scala
Dart
Crystal
F#
OCaml (Beta)
Fortran (Beta)
PowerShell (Beta)
Nim (Beta)
Racket
Reason (Beta)
Pascal (Beta)
Raku (Beta)
Perl (Beta)
Elm (Beta)
D (Beta)
Erlang (Beta)
Prolog (Beta)
λ Calculus (Beta)
CommonLisp (Beta)
Solidity (Beta)
CFML (Beta)
VB (Beta)
Forth (Beta)
PureScript (Beta)
SQL
RISC-V (Beta)
BF (Beta)
Train Now

Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

Description

A description has not yet been added for this collection.

Ad
7 kyu
Chinese Zodiac
1,971AcesOfGlory
Fundamentals
Arrays
7 kyu
Romanize Russian Passports
235bdupau
Strings
Fundamentals
5 kyu
Japanese Romaji-to-Hiragana Converter
111ewingsa
Logic
Strings
Parsing
Fundamentals
6 kyu
Numericals of a String
3,355Jomopipi
Puzzles
Performance
Algorithms
Retired
Simple transposition (retired)
2,887mariohernandezv
Algorithms
Cryptography
Fundamentals
5 kyu
Human Readable Time
142,373BattleRattle
Date Time
Mathematics
Algorithms
7 kyu
draw me a chessboard
2,285andrewMacmurray
Puzzles
Fundamentals
ASCII Art
Algorithms
6 kyu
Rectangle into Squares
32,442g964
Fundamentals
Geometry
Puzzles
6 kyu
Find within array
3,519kylehill
Arrays
Functional Programming
Fundamentals
6 kyu
Duplicate Arguments
4,358lunitik
Algorithms
4 kyu
Find the unknown digit
8,105JJ-Bug
Mathematics
Algorithms
Puzzles
6 kyu
Playing with digits
137,513g964
Fundamentals
Mathematics
4 kyu
Sum Strings as Numbers
43,244nicknovitski
Strings
Big Integers
Algorithms
7 kyu
Digital cypher
7,858dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
3,157dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Calculate Variance
2,529eerwitt
Statistics
Mathematics
Algorithms
6 kyu
Berlin Clock
541dupreesi
Date Time
Strings
Fundamentals
6 kyu
Easy Diagonal
2,244g964
Fundamentals
7 kyu
Regexp Basics - is it a vowel?
9,097taw
Regular Expressions
Fundamentals
8 kyu
Regexp Basics - is it a digit?
16,203taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a letter?
8,068taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing time
869taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing mana cost
370taw
Regular Expressions
Fundamentals
7 kyu
Regexp basics - parsing prices
1,457taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing integers
430taw
Regular Expressions
Fundamentals
6 kyu
Regexp Basics - is it IPv4 address?
2,707taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
891taw
Bits
Binary
Strings
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it all whitespace?
1,430taw
Regular Expressions
Fundamentals
Retired
Largest product in a series (retired)
107Raulvv
Status:Retired
Mathematics
Algorithms
7 kyu
Evens and Odds
6,790ocirion
Fundamentals
Binary
8 kyu
Basic Mathematical Operations
216,843Quickz
Mathematics
Fundamentals
7 kyu
Sum of integers in string
10,682kingcobra
Fundamentals
6 kyu
Digital cypher vol 3 - missing key
1,033dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Birthday I - Cake
7,153PG1
Fundamentals
Arrays
Mathematics
4 kyu
Matrix Determinant
22,827pjfranzini
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
6 kyu
Basic Encryption
3,232Tandyman
Mathematics
Strings
Ciphers
5 kyu
Rot13
91,410Rubikan
Ciphers
Fundamentals
5 kyu
ROT13
25,870hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Simple ROT13.5 cypher
665user9247539
Algorithms
Fundamentals
Ciphers
Cryptography
6 kyu
ROT13 variant cipher
629user8580805
Cryptography
Security
Strings
Algorithms
7 kyu
Cipher
569bubmet
Algorithms
Ciphers
Cryptography
Strings
4 kyu
Vigenère Cipher Helper
8,228jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
6 kyu
Tribonacci Sequence
153,444GiacomoSorbi
Number Theory
Arrays
Lists
Fundamentals
6 kyu
Fibonacci, Tribonacci and friends
13,218GiacomoSorbi
Arrays
Lists
Number Theory
Fundamentals
5 kyu
Primes in numbers
29,371g964
Fundamentals
Mathematics
6 kyu
A Rule of Divisibility by 13
15,648g964
Fundamentals
Algorithms
Mathematics
7 kyu
A Rule of Divisibility by 7
12,599g964
Fundamentals
7 kyu
Is n divisible by (...)?
7,566IVBakker
Fundamentals
7 kyu
Simple Fun #320: Scratch lottery I
1,115myjinxin2015
Puzzles
Regular Expressions
6 kyu
Count the smiley faces!
96,092St3f4n
Regular Expressions
Fundamentals
Retired
Count the Characters (retired)
3,679davidhu2000
Fundamentals
Regular Expressions
Algorithms
6 kyu
Count the days!
2,093zruF
Date Time
Fundamentals
6 kyu
Minutes to Midnight
1,124zruF
Date Time
Fundamentals
5 kyu
Guess The Gifts!
3,683BattleRattle
Algorithms
5 kyu
Integers: Recreation One
26,087g964
Fundamentals
Algorithms
7 kyu
Complementary DNA
222,786JustyFY
Strings
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,699junthecoder
Fundamentals
Algorithms
Strings
Parsing
6 kyu
Regex Tic Tac Toe Win Checker
1,234tachyonlabs
Games
Regular Expressions
Fundamentals
7 kyu
Regex Match Generator: Alternation
279wthit56
Strings
Regular Expressions
Fundamentals
4 kyu
Human readable duration format
82,253davazp
Strings
Date Time
Algorithms
6 kyu
Vowel-consonant lexicon
599KenKamau
Strings
Arrays
Algorithms
5 kyu
ISBN-10 Validation
10,405nklein
Regular Expressions
Algorithms
4 kyu
Most frequently used words in a text
27,793markprzepiora
Strings
Filtering
Algorithms
Regular Expressions
6 kyu
Pyramid Array
18,498sahglie
Algorithms
5 kyu
Base64 Encoding
5,097joseph.varnado
Binary
Strings
Algorithms
6 kyu
Base Conversion
10,718BattleRattle
Strings
Mathematics
Algorithms
6 kyu
Persistent Bugger.
197,195joh_pot
Fundamentals
Mathematics
5 kyu
Not very secure
46,071mayrsascha
Regular Expressions
Strings
6 kyu
Run-length encoding
9,699bkaes
Strings
Algorithms
6 kyu
Valid Phone Number
19,685xDranik
Regular Expressions
Algorithms
6 kyu
Transformation iteration
254joh_pot
Strings
Fundamentals
5 kyu
Common Denominators
14,810g964
Fundamentals
Algorithms
Mathematics
6 kyu
Duplicate Encoder
220,391obnounce
Strings
Arrays
Fundamentals
Retired
Calculator (retired)
11,547obrok
Algorithms
Parsing
Logic
Strings
Expressions
Basic Language Features
Fundamentals
Retired
Friday the 13ths (retired)
2,977user5854572
Date Time
Strings
Fundamentals
6 kyu
ASCII Fun #1: X- Shape
1,591zruF
ASCII Art
5 kyu
Convert all the cases!
1,423AJFarmar
Strings
Regular Expressions
Algorithms
4 kyu
So Many Permutations!
47,234BattleRattle
Permutations
Strings
Algorithms
6 kyu
Array Helpers
22,920BattleRattle
Arrays
Fundamentals
Object-oriented Programming