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8 kyu
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7 kyu
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5 kyu
4 kyu
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FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
18 Kata Found
7 kyu
Check whether a number is valid in a given numeral system
1,184
SummerTheCoder
Algorithms
Logic
Regular Expressions
6 kyu
Coordinates Validator
7,140
louy
7 Issues Reported
Regular Expressions
Algorithms
6 kyu
IP Validation
44,417
wink
4 Issues Reported
Regular Expressions
Algorithms
6 kyu
Split Strings
169,303
jhoffner
Regular Expressions
Strings
Algorithms
5 kyu
ISBN-10 Validation
11,637
nklein
4 Issues Reported
Regular Expressions
Algorithms
5 kyu
Not very secure
50,357
mayrsascha
11 Issues Reported
Regular Expressions
Strings
6 kyu
Convert string to camel case
206,515
jhoffner
20 Issues Reported
Regular Expressions
Algorithms
Strings
5 kyu
ROT13
29,092
hvaara
Strings
Ciphers
Regular Expressions
Algorithms
5 kyu
Alphabet war - Wo lo loooooo priests join the war
1,233
dcieslak
Strings
Regular Expressions
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,279
Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms
4 kyu
Binary multiple of 3
7,712
rsalgado
3 Issues Reported
Regular Expressions
Algorithms
Puzzles
Number Theory
6 kyu
Encrypt this!
23,758
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
8 kyu
FIXME: Replace all dots
33,120
dinglemouse
Debugging
Regular Expressions
7 kyu
Disemvowel Trolls
379,835
osuushi
4 Issues Reported
Strings
Regular Expressions
Fundamentals
6 kyu
Create Phone Number
353,067
xDranik
Arrays
Strings
Regular Expressions
Algorithms
6 kyu
Clever split
672
arhigod
1 Issue Reported
Strings
Regular Expressions
Fundamentals
7 kyu
Remove duplicate words
21,515
e.mihaylin
5 Issues Reported
Strings
Regular Expressions
Algorithms
6 kyu
Cancer cells
805
smolen
Regular Expressions
Fundamentals
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