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8th
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8th Track Management

This page provides the Exercism community with the information and tools needed to manage the 8th track.

Students
4,334
Submissions
16,628
Mentoring Discussions
45

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Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: efbfbfa59698d50701927d69a23ec9c02a8aa8ef (Updates should be instant)

Next goal: Implement 130 practice exercises. Find out more.
70 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
3,456
8,628 (avg. 2.5)
589 (17.0%)
0 (0.0%)
Two Fer Two Fer
371
2,212 (avg. 6.0)
71 (19.1%)
8 (2.2%)
Gigasecond Gigasecond
87
183 (avg. 2.1)
43 (49.4%)
1 (1.1%)
Leap Leap
87
534 (avg. 6.1)
51 (58.6%)
1 (1.1%)
Triangle Triangle
42
450 (avg. 10.7)
26 (61.9%)
2 (4.8%)
Trinary (Base-3) Numbers Trinary (Base-3) Numbers
31
296 (avg. 9.5)
25 (80.6%)
0 (0.0%)
Darts Darts
27
163 (avg. 6.0)
23 (85.2%)
3 (11.1%)
Resistor Color Resistor Color
22
77 (avg. 3.5)
18 (81.8%)
3 (13.6%)
Bob Bob
22
149 (avg. 6.8)
18 (81.8%)
0 (0.0%)
Hamming Hamming
74
740 (avg. 10.0)
57 (77.0%)
1 (1.4%)
Raindrops Raindrops
23
53 (avg. 2.3)
16 (69.6%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
22
83 (avg. 3.8)
17 (77.3%)
0 (0.0%)
Isogram Isogram
18
39 (avg. 2.2)
15 (83.3%)
1 (5.6%)
Word Count Word Count
19
91 (avg. 4.8)
14 (73.7%)
0 (0.0%)
Acronym Acronym
23
73 (avg. 3.2)
15 (65.2%)
1 (4.3%)
Resistor Color Duo Resistor Color Duo
3
5 (avg. 1.7)
2 (66.7%)
0 (0.0%)
Luhn Credit Card Number Checker Luhn Credit Card Number Checker
23
226 (avg. 9.8)
18 (78.3%)
1 (4.3%)
Collatz Conjecture Collatz Conjecture
23
67 (avg. 2.9)
21 (91.3%)
1 (4.3%)
Series Series
20
219 (avg. 11.0)
18 (90.0%)
2 (10.0%)
Pangram Pangram
17
60 (avg. 3.5)
14 (82.4%)
1 (5.9%)
Atbash Cipher Atbash Cipher
18
170 (avg. 9.4)
15 (83.3%)
3 (16.7%)
Yacht Yacht
15
194 (avg. 12.9)
14 (93.3%)
2 (13.3%)
Roman Numerals Roman Numerals
16
104 (avg. 6.5)
13 (81.3%)
1 (6.3%)
Reverse string Reverse string
27
115 (avg. 4.3)
22 (81.5%)
2 (7.4%)
Affine Cipher Affine Cipher
14
41 (avg. 2.9)
12 (85.7%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
15
346 (avg. 23.1)
10 (66.7%)
0 (0.0%)
Sieve Sieve
11
62 (avg. 5.6)
7 (63.6%)
0 (0.0%)
ETL ETL
8
24 (avg. 3.0)
7 (87.5%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
54
280 (avg. 5.2)
51 (94.4%)
1 (1.9%)
Difference of Squares Difference of Squares
6
33 (avg. 5.5)
5 (83.3%)
2 (33.3%)
Matching Brackets Matching Brackets
7
107 (avg. 15.3)
5 (71.4%)
3 (42.9%)
Grains Grains
7
10 (avg. 1.4)
4 (57.1%)
0 (0.0%)
RNA Transcription RNA Transcription
7
17 (avg. 2.4)
3 (42.9%)
1 (14.3%)
Scrabble Score Scrabble Score
5
16 (avg. 3.2)
2 (40.0%)
0 (0.0%)
Sum of Multiples Sum of Multiples
4
62 (avg. 15.5)
3 (75.0%)
1 (25.0%)
High Scores High Scores
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Largest Series Product Largest Series Product
5
30 (avg. 6.0)
2 (40.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
5
33 (avg. 6.6)
3 (60.0%)
1 (20.0%)
Perfect Numbers Perfect Numbers
4
3 (avg. 0.8)
2 (50.0%)
0 (0.0%)
Rotational Cipher Rotational Cipher
5
53 (avg. 10.6)
3 (60.0%)
1 (20.0%)
Flatten Array Flatten Array
5
13 (avg. 2.6)
3 (60.0%)
1 (20.0%)
Space Age Space Age
4
25 (avg. 6.3)
3 (75.0%)
0 (0.0%)
Square Root Square Root
6
14 (avg. 2.3)
2 (33.3%)
0 (0.0%)
Protein Translation Protein Translation
4
29 (avg. 7.3)
3 (75.0%)
1 (25.0%)
Strain Strain
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Nucleotide Count Nucleotide Count
4
7 (avg. 1.8)
2 (50.0%)
0 (0.0%)
Matrix Matrix
4
23 (avg. 5.8)
2 (50.0%)
0 (0.0%)
All Your Base All Your Base
5
23 (avg. 4.6)
2 (40.0%)
0 (0.0%)
Proverb Proverb
4
11 (avg. 2.8)
2 (50.0%)
0 (0.0%)
House House
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
5
2 (avg. 0.4)
2 (40.0%)
0 (0.0%)
Allergies Allergies
4
3 (avg. 0.8)
2 (50.0%)
0 (0.0%)
D&D Character D&D Character
4
3 (avg. 0.8)
2 (50.0%)
0 (0.0%)
Meetup Meetup
3
22 (avg. 7.3)
2 (66.7%)
0 (0.0%)
Food Chain Food Chain
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Bottle Song Bottle Song
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Binary Search Binary Search
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
Queen Attack Queen Attack
4
21 (avg. 5.3)
1 (25.0%)
1 (25.0%)
List Ops List Ops
3
5 (avg. 1.7)
2 (66.7%)
0 (0.0%)
ISBN Verifier ISBN Verifier
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Secret Handshake Secret Handshake
4
23 (avg. 5.8)
3 (75.0%)
0 (0.0%)
Anagram Anagram
4
13 (avg. 3.3)
3 (75.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
4
98 (avg. 24.5)
2 (50.0%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
3
15 (avg. 5.0)
2 (66.7%)
0 (0.0%)
Diamond Diamond
6
33 (avg. 5.5)
2 (33.3%)
1 (16.7%)
Phone Number Phone Number
6
27 (avg. 4.5)
3 (50.0%)
1 (16.7%)
Knapsack Knapsack
4
56 (avg. 14.0)
2 (50.0%)
0 (0.0%)
Prime Factors Prime Factors
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Circular Buffer Circular Buffer
7
98 (avg. 14.0)
2 (28.6%)
0 (0.0%)
60 unimplemented practice exercises
Alphametics Alphametics
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Book Store Book Store
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Bowling Bowling
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Change Change
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Clock Clock
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Complex Numbers Complex Numbers
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Connect Connect
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Conway's Game of Life Conway's Game of Life
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Crypto Square Crypto Square
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Custom Set Custom Set
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Dominoes Dominoes
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DOT DSL DOT DSL
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Error Handling Error Handling
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Forth Forth
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Go Counting Go Counting
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Grade School Grade School
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Grep Grep
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Hangman Hangman
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Killer Sudoku Helper Killer Sudoku Helper
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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Markdown Markdown
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Micro Blog Micro Blog
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Minesweeper Minesweeper
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Nth Prime Nth Prime
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OCR Numbers OCR Numbers
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PaaS I/O PaaS I/O
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Palindrome Products Palindrome Products
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Pig Latin Pig Latin
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Poker Poker
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POV POV
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Rail Fence Cipher Rail Fence Cipher
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Rational Numbers Rational Numbers
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React React
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Rectangles Rectangles
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Resistor Color Trio Resistor Color Trio
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REST API REST API
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Robot Name Robot Name
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Robot Simulator Robot Simulator
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Saddle Points Saddle Points
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Satellite Satellite
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Say Say
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SGF Parsing SGF Parsing
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Simple Cipher Simple Cipher
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Simple Linked List Simple Linked List
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Sublist Sublist
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Tournament Tournament
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Transpose Transpose
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Tree Building Tree Building
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Twelve Days Twelve Days
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Two Bucket Two Bucket
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Variable Length Quantity Variable Length Quantity
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Word Search Word Search
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Wordy Wordy
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Zebra Puzzle Zebra Puzzle
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Zipper Zipper
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Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: a96ace3fa887d64333fb9395f03600883eb81463 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. 8th is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
16,571
Test Run Pass Rate
13.3% (2196)
Test Run Fail Rate
26.6% (4409)
Test Run Error Rate
60.1% (9966)

Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for 8th: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.