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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.

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7 kyu
Monotone travel
6,440bkaes
Lists
Fundamentals
7 kyu
Invalid Input - Error Handling #1
2,865matt c
Strings
Fundamentals
7 kyu
Last
7,922xcthulhu
Lists
Fundamentals
7 kyu
Shortest Word
227,715PG1
Fundamentals
6 kyu
Coding Meetup #15 - Higher-Order Functions Series - Find the odd names
3,531PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
7 kyu
Coding Meetup #17 - Higher-Order Functions Series - Sort by programming language
1,919PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Sorting
6 kyu
Coding Meetup #16 - Higher-Order Functions Series - Ask for missing details
2,336PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
7 kyu
Fun with lists: anyMatch + allMatch
1,054janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Fun with lists: countIf
1,467janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Fun with lists: filter
1,090janitormeir
Lists
Functional Programming
Fundamentals
6 kyu
Count the smiley faces!
90,945St3f4n
Regular Expressions
Fundamentals
6 kyu
Write Number in Expanded Form
75,017Belax8
Strings
Mathematics
Algorithms
Fundamentals
7 kyu
Replace all items
3,459wichu
Fundamentals
Arrays
Lists
Regular Expressions
7 kyu
Fruit string calculator
1,812OlyaY
Strings
Regular Expressions
Fundamentals
7 kyu
Describe a list
1,453wichu
Lists
Fundamentals
7 kyu
Most digits
14,825Gbaja
Strings
Fundamentals
5 kyu
Find the smallest
5,073g964
Fundamentals
6 kyu
Mexican Wave
64,167adrian.eyre
Arrays
Strings
Fundamentals
7 kyu
Partial Word Searching
6,104obnounce
Arrays
Strings
Fundamentals
7 kyu
Scoring Tests
3,212CajunAzn7
Arrays
Fundamentals
6 kyu
Find the unique number
1,708kayahr
Arrays
Performance
Fundamentals
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 3 - Missing key
403dcieslak
Fundamentals
Ciphers
Cryptography
6 kyu
The takeWhile Function
2,310jgdodson
Functional Programming
Arrays
Algorithms
Lists
Data Structures
7 kyu
The dropWhile Function
3,304jgdodson
Functional Programming
Arrays
Algorithms
5 kyu
Find the unique string
5,260isqua
Fundamentals
Algorithms
Arrays
Strings
6 kyu
Find the unique number
135,702isqua
Fundamentals
Algorithms
Arrays
7 kyu
Return substring instance count
7,422jhoffner
Strings
Fundamentals
7 kyu
Sushi-go-round (Beginner's)
1,246artuKam
Fundamentals
Strings
Logic
6 kyu
Character with longest consecutive repetition
11,121suic
Strings
Fundamentals
Algorithms
7 kyu
Closest to Zero
1,582coffman_21
Lists
Fundamentals
6 kyu
Number Zoo Patrol
5,683shawkinsl
Algorithms
Performance
Mathematics
5 kyu
Closest and Smallest
3,148g964
Fundamentals
Sorting
7 kyu
Remove duplicate words
20,082e.mihaylin
Strings
Regular Expressions
Algorithms