Kata
Sign Up
Kata
Kumite
Forum
Wiki
Leaders
Log In
Sign Up
Library
Collections
Sort by:
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Recently Published
Hardest
Easiest
Name
Language:
All
My Languages
Agda (Beta)
BF (Beta)
C
Clojure
CoffeeScript
Coq (Beta)
C++
Crystal
C#
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy (Beta)
Haskell
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin (Beta)
Lua (Beta)
NASM (Beta)
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
PHP
PowerShell (Beta)
PureScript (Beta)
Python
R (Beta)
Racket (Beta)
Reason (Beta)
Ruby
Rust
Scala (Beta)
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Status:
Approved & Beta
Approved
Beta
Progress:
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
Difficulty:
8 kyu
8 kyu
7 kyu
7 kyu
6 kyu
6 kyu
5 kyu
5 kyu
4 kyu
4 kyu
3 kyu
3 kyu
2 kyu
2 kyu
1 kyu
1 kyu
Tags:
Fundamentals (4001)
Algorithms (2953)
Data Types (2424)
Logic (2145)
Numbers (1272)
Strings (1167)
Puzzles (1157)
Arrays (1011)
Games (977)
Mathematics (968)
Basic Language Features (838)
Programming Paradigms (791)
Data Structures (567)
Control Flow (551)
Declarative Programming (488)
Advanced Language Features (345)
Regular Expressions (263)
Object-oriented Programming (242)
Functions (210)
Lists (208)
Functional Programming (173)
Arithmetic (170)
Loops (167)
Objects (141)
Bugs (131)
Data (126)
Algebra (125)
Theoretical Computer Science (114)
Security (111)
Performance (109)
Sorting (105)
Parsing (103)
Computability Theory (100)
Recursion (100)
Binary (95)
Classes (95)
Integers (93)
Optimization (91)
Utilities (86)
Cryptography (85)
Geometry (85)
Databases (83)
Information Systems (83)
SQL (81)
Graphs (79)
Dates/Time (73)
Sequences (64)
Design Principles (61)
Design Patterns (59)
Formatting (51)
1147 Kata Found
8 kyu
Count the Monkeys!
182
182
67
89%
of
2,287
20,153
A.Partridge
1 Issue Reported
Algorithms
Arrays
Fundamentals
Ranges
Basic Language Features
Lists
Data Structures
8 kyu
The 'if' function
114
114
29
70%
of
829
8,635
user578387
3 Issues Reported
Fundamentals
Functional Programming
Declarative Programming
Higher-order Functions
Functions
Control Flow
Basic Language Features
6 kyu
Vowels Back
28
28
4
84%
of
97
354
A.Partridge
1 Issue Reported
Algorithms
Fundamentals
Strings
Arrays
Loops
Control Flow
Basic Language Features
7 kyu
The wheat/rice and chessboard problem
48
48
10
92%
of
258
1,160
GiacomoSorbi
Puzzles
Mathematics
Algorithms
Numbers
Bitwise Operators
Bits
Operators
Advanced Language Features
Binary
Fundamentals
Recursion
Computability Theory
Theoretical Computer Science
6 kyu
The Supermarket Queue
1611
1611
346
93%
of
2,540
14,055
mattlub
Fundamentals
Arrays
Loops
Control Flow
Basic Language Features
6 kyu
Tetris Series #2 — Primitive Gameplay
8
8
1
95%
of
19
46
Etoneja
Fundamentals
Games
Algorithms
Basic Language Features
Loops
Control Flow
Arrays
6 kyu
Create Phone Number
604
604
183
82%
of
6,045
54,966
xDranik
Algorithms
Arrays
Strings
Loops
Control Flow
Basic Language Features
Fundamentals
Formatting
Regular Expressions
Declarative Programming
Advanced Language Features
5 kyu
Master your primes: sieve with memoization
26
26
12
82%
of
25
68
GiacomoSorbi
Algorithms
Memoization
Design Patterns
Design Principles
Optimization
8 kyu
Yield to the Block
28
28
3
89%
of
94
2,450
agram
1 Issue Reported
Fundamentals
Blocks
Object-oriented Programming
Functions
Control Flow
Basic Language Features
Functional Programming
Declarative Programming
Higher-order Functions
6 kyu
Socialist distribution
33
33
5
93%
of
68
227
GiacomoSorbi
Algorithms
Arrays
Lists
Data Structures
Statistics
Data
7 kyu
Descending Order
819
819
146
88%
of
8,409
62,176
TastyOs
1 Issue Reported
Fundamentals
Functions
Control Flow
Basic Language Features
7 kyu
Testing 1-2-3
56
56
11
95%
of
1,170
4,774
acr
Fundamentals
Arrays
Iterators
Control Flow
Object-oriented Programming
Basic Language Features
4 kyu
How many numbers III?
342
342
57
94%
of
241
1,125
raulbc777
1 Issue Reported
Fundamentals
Data Structures
Algorithms
Control Flow
Basic Language Features
Mathematics
Numbers
Declarative Programming
7 kyu
Sum of Cubes
25
25
8
90%
of
438
2,848
MementoMori
Fundamentals
Control Flow
Basic Language Features
8 kyu
Multiple of index
50
50
31
90%
of
736
4,239
Dmitry Kudla
1 Issue Reported
Fundamentals
Arrays
Numbers
Basic Language Features
6 kyu
Longest palindrome
27
27
9
90%
of
93
310
georgesykes86
Algorithms
Loops
Control Flow
Basic Language Features
Fundamentals
Arrays
Strings
7 kyu
Consecutive Ducks
15
15
4
88%
of
52
212
MrZizoScream
Puzzles
Fundamentals
Numbers
Basic Language Features
6 kyu
JSON Class Decorator
11
11
3
98%
of
30
62
SquishyStrawberry
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
6 kyu
Look and say sequence generator
28
28
6
95%
of
104
322
GiacomoSorbi
Fundamentals
Sequences
Arrays
Constructors
Basic Language Features
Strings
Regular Expressions
Declarative Programming
Advanced Language Features
Numbers
6 kyu
Longest alphabetical substring
15
15
4
96%
of
101
335
Avanta
Fundamentals
Strings
Basic Language Features
5 kyu
Church Booleans
6
6
6
90%
of
34
89
PaulBlanche
Fundamentals
Lambdas
Functional Programming
Functions
Declarative Programming
Control Flow
Basic Language Features
8 kyu
Grasshopper - Personalized Message
64
64
29
84%
of
1,558
11,223
danleavitt0
1 Issue Reported
Fundamentals
Conditional Statements
Control Flow
Basic Language Features
6 kyu
Fibonacci on roids
18
18
10
84%
of
54
176
GiacomoSorbi
Algorithms
Recursion
Computability Theory
Theoretical Computer Science
Optimization
Iterators
Control Flow
Object-oriented Programming
Basic Language Features
Fundamentals
Map/Reduce
Lists
Data Structures
Arrays
8 kyu
A wolf in sheep's clothing
53
53
15
88%
of
544
3,895
jkempster34
Fundamentals
Arrays
Loops
Control Flow
Basic Language Features
7 kyu
Complete The Pattern #7 - Cyclical Permutation
33
33
5
91%
of
131
1,093
curious_db97
Fundamentals
Loops
Control Flow
Basic Language Features
Sequences
Arrays
5 kyu
Simple Finite State Machine Compiler
57
57
9
97%
of
47
205
Catfider
Fundamentals
State Machines
Computational Science
Theoretical Computer Science
Design Patterns
Interpreters
Algorithms
Classes
Basic Language Features
Object-oriented Programming
Compiler Theory
5 kyu
Vector Class
17
17
4
90%
of
39
120
Detry322
Fundamentals
Dynamic Arrays
Arrays
Functional Programming
Declarative Programming
Vectors
Classes
Basic Language Features
Object-oriented Programming
2 kyu
Evaluate mathematical expression
781
781
146
94%
of
663
3,218
ankr
12 Issues Reported
Algorithms
Mathematics
Numbers
Expressions
Basic Language Features
Fundamentals
Operators
Parsing
Strings
8 kyu
Remove First and Last Character
342
342
148
89%
of
6,164
49,008
Steadyx
1 Issue Reported
Fundamentals
Basic Language Features
Strings
5 kyu
Snakes and Ladders
328
328
98
95%
of
439
1,807
adrian.eyre
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
Functions
Control Flow
Design Patterns
Design Principles
Games
Loading...
Confirm