Cool Kata
167495 kyuPnd72
Loading...
Choose Language...
Python
JavaScript
Ruby
CoffeeScript
C#
Java
Julia (Beta)
Kotlin
Haskell
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
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)
Dart
Solidity (Beta)
CFML (Beta)
VB (Beta)
Forth (Beta)
PureScript (Beta)
SQL
RISC-V (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
1,176AcesOfGlory
Fundamentals
Arrays
7 kyu
Romanize Russian Passports
227bdupau
Strings
Fundamentals
5 kyu
Japanese Romaji-to-Hiragana Converter
107ewingsa
Logic
Strings
Parsing
Fundamentals
6 kyu
Numericals of a String
3,249Jomopipi
Puzzles
Performance
Algorithms
Retired
Simple transposition (retired)
2,887mariohernandezv
Algorithms
Cryptography
Fundamentals
5 kyu
Human Readable Time
133,814BattleRattle
Date Time
Mathematics
Algorithms
7 kyu
draw me a chessboard
2,205andrewMacmurray
Puzzles
Fundamentals
ASCII Art
Algorithms
6 kyu
Rectangle into Squares
31,365g964
Fundamentals
Geometry
Puzzles
6 kyu
Find within array
3,448kylehill
Arrays
Functional Programming
Fundamentals
6 kyu
Duplicate Arguments
4,100lunitik
Algorithms
4 kyu
Find the unknown digit
7,724JJ-Bug
Mathematics
Algorithms
Puzzles
6 kyu
Playing with digits
130,643g964
Fundamentals
Mathematics
4 kyu
Sum Strings as Numbers
40,537nicknovitski
Strings
Big Integers
Algorithms
7 kyu
Digital cypher
7,308dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
2,834dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Calculate Variance
2,428eerwitt
Statistics
Mathematics
Algorithms
6 kyu
Berlin Clock
436dupreesi
Date Time
Strings
Fundamentals
6 kyu
Easy Diagonal
2,185g964
Fundamentals
7 kyu
Regexp Basics - is it a vowel?
8,846taw
Regular Expressions
Fundamentals
8 kyu
Regexp Basics - is it a digit?
15,459taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a letter?
7,839taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing time
845taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing mana cost
358taw
Regular Expressions
Fundamentals
7 kyu
Regexp basics - parsing prices
1,367taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing integers
418taw
Regular Expressions
Fundamentals
6 kyu
Regexp Basics - is it IPv4 address?
2,621taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
849taw
Bits
Binary
Strings
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it all whitespace?
1,372taw
Regular Expressions
Fundamentals
Retired
Largest product in a series (retired)
107Raulvv
Status:Retired
Mathematics
Algorithms
7 kyu
Evens and Odds
6,427ocirion
Fundamentals
Binary
8 kyu
Basic Mathematical Operations
195,880Quickz
Mathematics
Fundamentals
6 kyu
Digital cypher vol 3 - missing key
964dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Birthday I - Cake
7,013PG1
Fundamentals
Arrays
Mathematics
4 kyu
Matrix Determinant
20,628pjfranzini
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
6 kyu
Basic Encryption
3,154Tandyman
Mathematics
Strings
Ciphers
5 kyu
Rot13
86,143Rubikan
Ciphers
Fundamentals
5 kyu
ROT13
23,110hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Simple ROT13.5 cypher
604user9247539
Algorithms
Fundamentals
Ciphers
Cryptography
6 kyu
ROT13 variant cipher
606user8580805
Cryptography
Security
Strings
Algorithms
7 kyu
Cipher
528bubmet
Algorithms
Ciphers
Cryptography
Strings
4 kyu
Vigenère Cipher Helper
7,759jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
6 kyu
Tribonacci Sequence
145,679GiacomoSorbi
Number Theory
Arrays
Lists
Fundamentals
6 kyu
Fibonacci, Tribonacci and friends
12,773GiacomoSorbi
Arrays
Lists
Number Theory
Fundamentals
5 kyu
Primes in numbers
27,838g964
Fundamentals
Mathematics
6 kyu
A Rule of Divisibility by 13
15,177g964
Fundamentals
Algorithms
Mathematics
7 kyu
A Rule of Divisibility by 7
12,278g964
Fundamentals
7 kyu
Is n divisible by (...)?
7,284IVBakker
Fundamentals
7 kyu
Simple Fun #320: Scratch lottery I
1,056myjinxin2015
Puzzles
Regular Expressions
6 kyu
Count the smiley faces!
90,418St3f4n
Regular Expressions
Fundamentals
Retired
Count the Characters (retired)
3,679davidhu2000
Fundamentals
Regular Expressions
Algorithms
6 kyu
Count the days!
2,016zruF
Date Time
Fundamentals
6 kyu
Minutes to Midnight
1,047zruF
Date Time
Fundamentals
5 kyu
Guess The Gifts!
3,614BattleRattle
Algorithms
5 kyu
Integers: Recreation One
25,063g964
Fundamentals
Algorithms
7 kyu
Complementary DNA
209,266JustyFY
Strings
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,602junthecoder
Fundamentals
Algorithms
Strings
Parsing
6 kyu
Regex Tic Tac Toe Win Checker
1,196tachyonlabs
Games
Regular Expressions
Fundamentals
7 kyu
Regex Match Generator: Alternation
261wthit56
Strings
Regular Expressions
Fundamentals
4 kyu
Human readable duration format
76,986davazp
Strings
Date Time
Algorithms
6 kyu
Vowel-consonant lexicon
579KenKamau
Strings
Arrays
Algorithms
5 kyu
ISBN-10 Validation
9,517nklein
Regular Expressions
Algorithms
4 kyu
Most frequently used words in a text
25,809markprzepiora
Strings
Filtering
Algorithms
Regular Expressions
6 kyu
Pyramid Array
17,285sahglie
Algorithms
5 kyu
Base64 Encoding
4,954joseph.varnado
Binary
Strings
Algorithms
6 kyu
Base Conversion
10,374BattleRattle
Strings
Mathematics
Algorithms
6 kyu
Persistent Bugger.
185,677joh_pot
Fundamentals
Mathematics
5 kyu
Not very secure
41,871mayrsascha
Regular Expressions
Strings
6 kyu
Run-length encoding
9,524bkaes
Strings
Algorithms
6 kyu
Valid Phone Number
19,073xDranik
Regular Expressions
Algorithms
6 kyu
Transformation iteration
241joh_pot
Strings
Fundamentals
5 kyu
Common Denominators
14,326g964
Fundamentals
Algorithms
Mathematics
6 kyu
Duplicate Encoder
206,629obnounce
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
1,535zruF
ASCII Art
5 kyu
Convert all the cases!
1,357AJFarmar
Strings
Regular Expressions
Algorithms
4 kyu
So Many Permutations!
44,596BattleRattle
Permutations
Strings
Algorithms
6 kyu
Array Helpers
22,061BattleRattle
Arrays
Fundamentals
Object-oriented Programming