Kata
Sign Up
Kata
Kumite
Forum
Docs
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
BF (Beta)
C
Clojure
CoffeeScript
C++
Crystal
C#
Dart
Elixir
F#
Go
Haskell
Java
JavaScript
Lua (Beta)
Objective-C (Beta)
OCaml (Beta)
PHP
Python
R (Beta)
Ruby
Rust
Shell
SQL
Swift
TypeScript
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 (2337)
Algorithms (1582)
Data Types (1444)
Logic (1158)
Strings (720)
Numbers (681)
Arrays (613)
Puzzles (607)
Basic Language Features (536)
Games (519)
Programming Paradigms (519)
Mathematics (506)
Data Structures (351)
Control Flow (334)
Declarative Programming (325)
Advanced Language Features (200)
Regular Expressions (166)
Object-oriented Programming (164)
Functions (154)
Lists (138)
Functional Programming (127)
Arithmetic (102)
Bugs (101)
Objects (101)
Loops (82)
Utilities (81)
Data (75)
Classes (72)
Parsing (72)
Theoretical Computer Science (69)
Binary (67)
Security (64)
Integers (63)
Sorting (62)
Computability Theory (60)
Recursion (60)
Algebra (59)
Databases (51)
Information Systems (51)
SQL (49)
Cryptography (47)
Optimization (43)
Dates/Time (42)
Geometry (42)
Formatting (40)
Hashes (38)
Higher-order Functions (37)
Graphs (35)
Prototypes (34)
Sequences (34)
164 Kata Found
2 kyu
Binary Genetic Algorithms
459
459
37
95%
of
230
947
eugene-bulkin
2 Issues Reported
Fundamentals
Genetic Algorithms
Algorithms
Classes
Basic Language Features
Object-oriented Programming
Machine Learning
Applied Computer Science
6 kyu
Hall Of Fame
3
3
1
100%
of
14
26
ZozoFouchtra
Fundamentals
Arrays
Classes
Basic Language Features
Object-oriented Programming
5 kyu
Singleton Adam & Eve
7
7
0
92%
of
19
34
FrankK
Fundamentals
Object-oriented Programming
Design Patterns
Design Principles
Singleton
6 kyu
EventEmitter
5
5
0
100%
of
17
77
Lordnibbler
Fundamentals
Blocks
Object-oriented Programming
Functions
Control Flow
Basic Language Features
Data Structures
Hashes
Arrays
Algorithms
5 kyu
Program a Calculator #2 - 3D Vectors
6
6
1
94%
of
16
29
donaldsebleung
Algorithms
Mathematics
Numbers
Object-oriented Programming
6 kyu
High score table
9
9
4
99%
of
38
117
kingcobra
Algorithms
Sorting
Arrays
Sequences
Object-oriented Programming
6 kyu
React Fun #1: Component types and nesting
5
5
2
87%
of
26
72
SandQueen
Fundamentals
React
Babel
Frameworks
ES2015
JSX
Classes
Basic Language Features
Object-oriented Programming
Inheritance
Polymorphism
6 kyu
Sortable Shapes
21
21
6
86%
of
62
225
FrankK
2 Issues Reported
Fundamentals
Object-oriented Programming
Sorting
Algorithms
Mathematics
Numbers
Design Patterns
Design Principles
Objects
6 kyu
Fibonacci on roids
3
3
0
93%
of
20
52
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
7 kyu
Simple Class Terminology
1
1
0
89%
of
31
79
Anarki
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
6 kyu
Image host filename generator
2
2
0
89%
of
36
80
jtauri
Fundamentals
Objects
Object-oriented Programming
Strings
5 kyu
Constructing a car #2 - Driving
2
2
1
95%
of
11
22
SteffenVogel_79
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
Objects
Data Structures
5 kyu
PaginationHelper
267
267
30
82%
of
459
6,174
jhoffner
11 Issues Reported
Algorithms
Object-oriented Programming
Classes
Basic Language Features
Fundamentals
Utilities
Arrays
Collections
Lists
Data Structures
4 kyu
Ranking Poker Hands
162
162
22
94%
of
124
364
FrankK
Algorithms
Object-oriented Programming
Games
1 kyu
Fast Stats on an Array
34
34
5
91%
of
27
53
constablebrew
1 Issue Reported
Fundamentals
Properties
Basic Language Features
Object-oriented Programming
Inheritance
Polymorphism
Scopes
3 kyu
Don't rely on luck HARDCORE
27
27
4
91%
of
39
80
tianshuo
Refactoring
Object-oriented Programming
Mathematics
Algorithms
Numbers
Prototypes
Security
8 kyu
Finish Guess the Number Game
59
59
10
83%
of
200
1,900
brunolm
5 Issues Reported
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
ES2015
Babel
7 kyu
Statistics - Fundamentals
8
8
1
96%
of
12
45
donaldsebleung
Fundamentals
Object-oriented Programming
Mathematics
Algorithms
Numbers
5 kyu
Python's Dynamic Classes #3
5
5
1
100%
of
26
71
adam-tokarski
Fundamentals
Object-oriented Programming
Classes
Basic Language Features
7 kyu
Reflection in PHP #1 - Introduction
4
4
4
100%
of
6
17
donaldsebleung
Fundamentals
Object-oriented Programming
Reverse Engineering
Security
5 kyu
Reflection #5 - Call me back
7
7
2
92%
of
13
46
SteffenVogel_79
Fundamentals
Advanced Language Features
Classes
Basic Language Features
Object-oriented Programming
Objects
Reflection
Metaprogramming
5 kyu
Connect 4
52
52
7
96%
of
42
127
adrian.eyre
Fundamentals
Arrays
Classes
Basic Language Features
Object-oriented Programming
5 kyu
Snakes and Ladders
46
46
12
97%
of
65
170
adrian.eyre
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
Functions
Control Flow
5 kyu
Reflection #3 - Add the member-results
2
2
1
87%
of
19
40
SteffenVogel_79
Fundamentals
Advanced Language Features
Classes
Basic Language Features
Object-oriented Programming
Objects
Reflection
Metaprogramming
4 kyu
Reflection #4 - Complete-Invoke
5
5
1
91%
of
17
47
SteffenVogel_79
Fundamentals
Advanced Language Features
Classes
Basic Language Features
Object-oriented Programming
Objects
Reflection
Metaprogramming
6 kyu
Fractions class
13
13
1
93%
of
34
137
Dr.RiD
Fundamentals
Classes
Basic Language Features
Object-oriented Programming
6 kyu
Reflection #2 - Give me all methods
2
2
1
81%
of
26
66
SteffenVogel_79
Fundamentals
Advanced Language Features
Classes
Basic Language Features
Object-oriented Programming
Objects
Reflection
Metaprogramming
5 kyu
Object-Oriented PHP #10 - Objects on the Fly [Advanced]
3
3
4
97%
of
17
42
donaldsebleung
Fundamentals
Object-oriented Programming
Type Casting
6 kyu
Object-Oriented PHP #9 - Abstract Classes [Advanced]
1
1
5
95%
of
28
87
donaldsebleung
Fundamentals
Object-oriented Programming
Abstract Classes
Classes
Basic Language Features
6 kyu
Object-Oriented PHP #6 - Visibility
6
6
5
91%
of
34
131
donaldsebleung
Fundamentals
Object-oriented Programming
Loading...
Confirm