Roc
Roc
About RocPractice

Roc Track Management

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

Students
163
Submissions
6,248
Mentoring Discussions
7

The Roc track needs attention ⚠️

Building

Practice Exercises

Learn More

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: 2fc0ac59ca819f86d14a3e8cd53a7f04b1873aba (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
105 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
148
160 (avg. 1.1)
123 (83.1%)
0 (0.0%)
High Scores High Scores
43
146 (avg. 3.4)
30 (69.8%)
0 (0.0%)
Leap Leap
86
300 (avg. 3.5)
70 (81.4%)
0 (0.0%)
Raindrops Raindrops
64
436 (avg. 6.8)
57 (89.1%)
1 (1.6%)
Resistor Color Resistor Color
58
155 (avg. 2.7)
53 (91.4%)
0 (0.0%)
Two-Fer Two-Fer
53
120 (avg. 2.3)
51 (96.2%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
46
308 (avg. 6.7)
40 (87.0%)
3 (6.5%)
Complex Numbers Complex Numbers
26
122 (avg. 4.7)
20 (76.9%)
0 (0.0%)
Darts Darts
36
108 (avg. 3.0)
30 (83.3%)
0 (0.0%)
Difference of Squares Difference of Squares
30
84 (avg. 2.8)
30 (100.0%)
0 (0.0%)
Grains Grains
29
207 (avg. 7.1)
25 (86.2%)
0 (0.0%)
Isogram Isogram
28
162 (avg. 5.8)
24 (85.7%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
13
98 (avg. 7.5)
10 (76.9%)
0 (0.0%)
Micro Blog Micro Blog
15
91 (avg. 6.1)
10 (66.7%)
0 (0.0%)
Nucleotide Count Nucleotide Count
13
71 (avg. 5.5)
12 (92.3%)
0 (0.0%)
Proverb Proverb
12
57 (avg. 4.8)
11 (91.7%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
19
91 (avg. 4.8)
17 (89.5%)
0 (0.0%)
RNA Transcription RNA Transcription
23
70 (avg. 3.0)
21 (91.3%)
0 (0.0%)
Robot Simulator Robot Simulator
12
49 (avg. 4.1)
10 (83.3%)
0 (0.0%)
Roman Numerals Roman Numerals
9
8 (avg. 0.9)
7 (77.8%)
0 (0.0%)
Scrabble Score Scrabble Score
14
31 (avg. 2.2)
13 (92.9%)
0 (0.0%)
Secret Handshake Secret Handshake
13
52 (avg. 4.0)
12 (92.3%)
0 (0.0%)
Series Series
11
63 (avg. 5.7)
9 (81.8%)
0 (0.0%)
Space Age Space Age
16
45 (avg. 2.8)
15 (93.8%)
0 (0.0%)
Sublist Sublist
16
51 (avg. 3.2)
12 (75.0%)
1 (6.3%)
Sum of Multiples Sum of Multiples
11
20 (avg. 1.8)
9 (81.8%)
0 (0.0%)
Triangle Triangle
11
17 (avg. 1.5)
9 (81.8%)
1 (9.1%)
Allergies Allergies
9
15 (avg. 1.7)
6 (66.7%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
12
31 (avg. 2.6)
11 (91.7%)
0 (0.0%)
Atbash Cipher Atbash Cipher
5
29 (avg. 5.8)
4 (80.0%)
0 (0.0%)
Binary Search Binary Search
15
53 (avg. 3.5)
10 (66.7%)
1 (6.7%)
Bob Bob
10
25 (avg. 2.5)
9 (90.0%)
0 (0.0%)
Clock Clock
24
288 (avg. 12.0)
16 (66.7%)
0 (0.0%)
Crypto Square Crypto Square
5
58 (avg. 11.6)
4 (80.0%)
0 (0.0%)
Diamond Diamond
10
45 (avg. 4.5)
8 (80.0%)
0 (0.0%)
ETL ETL
15
22 (avg. 1.5)
12 (80.0%)
0 (0.0%)
Hamming Hamming
12
43 (avg. 3.6)
10 (83.3%)
0 (0.0%)
ISBN Verifier ISBN Verifier
8
14 (avg. 1.8)
6 (75.0%)
0 (0.0%)
Largest Series Product Largest Series Product
4
46 (avg. 11.5)
2 (50.0%)
0 (0.0%)
Matching Brackets Matching Brackets
8
24 (avg. 3.0)
6 (75.0%)
0 (0.0%)
Matrix Matrix
9
109 (avg. 12.1)
7 (77.8%)
0 (0.0%)
Nth Prime Nth Prime
4
3 (avg. 0.8)
3 (75.0%)
0 (0.0%)
Pangram Pangram
13
19 (avg. 1.5)
11 (84.6%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
4
7 (avg. 1.8)
3 (75.0%)
0 (0.0%)
Phone Number Phone Number
4
66 (avg. 16.5)
3 (75.0%)
0 (0.0%)
Protein Translation Protein Translation
6
6 (avg. 1.0)
5 (83.3%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
5
124 (avg. 24.8)
3 (60.0%)
0 (0.0%)
Queen Attack Queen Attack
7
15 (avg. 2.1)
6 (85.7%)
0 (0.0%)
Rectangles Rectangles
9
23 (avg. 2.6)
5 (55.6%)
0 (0.0%)
Reverse String Reverse String
9
18 (avg. 2.0)
8 (88.9%)
0 (0.0%)
Rotational Cipher Rotational Cipher
8
9 (avg. 1.1)
7 (87.5%)
0 (0.0%)
Saddle Points Saddle Points
6
6 (avg. 1.0)
4 (66.7%)
0 (0.0%)
Say Say
6
71 (avg. 11.8)
5 (83.3%)
0 (0.0%)
Sieve Sieve
5
15 (avg. 3.0)
4 (80.0%)
0 (0.0%)
Simple Linked List Simple Linked List
3
13 (avg. 4.3)
2 (66.7%)
0 (0.0%)
Spiral Matrix Spiral Matrix
4
21 (avg. 5.3)
3 (75.0%)
0 (0.0%)
Square Root Square Root
6
5 (avg. 0.8)
5 (83.3%)
0 (0.0%)
Strain Strain
5
6 (avg. 1.2)
4 (80.0%)
0 (0.0%)
Transpose Transpose
7
67 (avg. 9.6)
4 (57.1%)
0 (0.0%)
Word Count Word Count
6
65 (avg. 10.8)
5 (83.3%)
0 (0.0%)
Yacht Yacht
6
33 (avg. 5.5)
5 (83.3%)
0 (0.0%)
Affine Cipher Affine Cipher
2
19 (avg. 9.5)
0 (0.0%)
0 (0.0%)
Anagram Anagram
15
122 (avg. 8.1)
8 (53.3%)
0 (0.0%)
Binary Search Tree Binary Search Tree
5
32 (avg. 6.4)
4 (80.0%)
0 (0.0%)
Custom Set Custom Set
4
4 (avg. 1.0)
2 (50.0%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
8
14 (avg. 1.8)
7 (87.5%)
0 (0.0%)
Food Chain Food Chain
6
51 (avg. 8.5)
3 (50.0%)
0 (0.0%)
House House
7
28 (avg. 4.0)
6 (85.7%)
0 (0.0%)
Meetup Meetup
2
12 (avg. 6.0)
1 (50.0%)
0 (0.0%)
OCR Numbers OCR Numbers
4
215 (avg. 53.8)
2 (50.0%)
0 (0.0%)
Perfect Numbers Perfect Numbers
5
4 (avg. 0.8)
4 (80.0%)
0 (0.0%)
Prime Factors Prime Factors
5
5 (avg. 1.0)
4 (80.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
4
15 (avg. 3.8)
3 (75.0%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
2
6 (avg. 3.0)
0 (0.0%)
0 (0.0%)
All Your Base All Your Base
8
8 (avg. 1.0)
6 (75.0%)
0 (0.0%)
Circular Buffer Circular Buffer
7
55 (avg. 7.9)
6 (85.7%)
0 (0.0%)
Error Handling Error Handling
8
61 (avg. 7.6)
6 (75.0%)
0 (0.0%)
Flatten Array Flatten Array
9
16 (avg. 1.8)
8 (88.9%)
1 (11.1%)
Killer Sudoku Helper Killer Sudoku Helper
5
18 (avg. 3.6)
2 (40.0%)
0 (0.0%)
Knapsack Knapsack
4
6 (avg. 1.5)
3 (75.0%)
0 (0.0%)
Rail Fence Cipher Rail Fence Cipher
3
2 (avg. 0.7)
1 (33.3%)
0 (0.0%)
Acronym Acronym
8
13 (avg. 1.6)
7 (87.5%)
0 (0.0%)
Change Change
3
12 (avg. 4.0)
2 (66.7%)
0 (0.0%)
Connect Connect
5
66 (avg. 13.2)
3 (60.0%)
0 (0.0%)
Go Counting Go Counting
5
260 (avg. 52.0)
2 (40.0%)
0 (0.0%)
Gigasecond Gigasecond
5
32 (avg. 6.4)
4 (80.0%)
1 (20.0%)
List Ops List Ops
10
11 (avg. 1.1)
8 (80.0%)
0 (0.0%)
Luhn Luhn
7
19 (avg. 2.7)
6 (85.7%)
1 (14.3%)
Minesweeper Minesweeper
7
13 (avg. 1.9)
5 (71.4%)
0 (0.0%)
Palindrome Products Palindrome Products
2
17 (avg. 8.5)
0 (0.0%)
0 (0.0%)
Rational Numbers Rational Numbers
5
27 (avg. 5.4)
4 (80.0%)
0 (0.0%)
Tournament Tournament
3
8 (avg. 2.7)
2 (66.7%)
0 (0.0%)
Two Bucket Two Bucket
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Word Search Word Search
4
8 (avg. 2.0)
3 (75.0%)
0 (0.0%)
Bowling Bowling
5
31 (avg. 6.2)
2 (40.0%)
0 (0.0%)
Pig Latin Pig Latin
6
51 (avg. 8.5)
4 (66.7%)
0 (0.0%)
Poker Poker
4
62 (avg. 15.5)
2 (50.0%)
0 (0.0%)
Wordy Wordy
5
27 (avg. 5.4)
4 (80.0%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
2
15 (avg. 7.5)
1 (50.0%)
0 (0.0%)
Alphametics Alphametics
5
54 (avg. 10.8)
1 (20.0%)
0 (0.0%)
Dominoes Dominoes
4
41 (avg. 10.3)
2 (50.0%)
0 (0.0%)
Grep Grep
3
10 (avg. 3.3)
1 (33.3%)
0 (0.0%)
REST API REST API
9
52 (avg. 5.8)
3 (33.3%)
0 (0.0%)
Forth Forth
7
39 (avg. 5.6)
5 (71.4%)
0 (0.0%)
SGF Parsing SGF Parsing
3
17 (avg. 5.7)
0 (0.0%)
0 (0.0%)
4 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
21
46 (avg. 2.2)
21 (100.0%)
0 (0.0%)
Binary Binary
16
82 (avg. 5.1)
14 (87.5%)
0 (0.0%)
Hexadecimal Hexadecimal
5
13 (avg. 2.6)
3 (60.0%)
0 (0.0%)
Octal Octal
4
10 (avg. 2.5)
4 (100.0%)
0 (0.0%)
24 unimplemented practice exercises
Bank Account Bank Account
View dataThe link opens in a new window or tab
Book Store Book Store
View dataThe link opens in a new window or tab
Bottle Song Bottle Song
View dataThe link opens in a new window or tab
Conway's Game of Life Conway's Game of Life
View dataThe link opens in a new window or tab
D&D Character D&D Character
View dataThe link opens in a new window or tab
DOT DSL DOT DSL
View dataThe link opens in a new window or tab
Grade School Grade School
View dataThe link opens in a new window or tab
Hangman Hangman
View dataThe link opens in a new window or tab
Ledger Ledger
View dataThe link opens in a new window or tab
Lens Person Lens Person
View dataThe link opens in a new window or tab
Linked List Linked List
View dataThe link opens in a new window or tab
Markdown Markdown
View dataThe link opens in a new window or tab
PaaS I/O PaaS I/O
View dataThe link opens in a new window or tab
Parallel Letter Frequency Parallel Letter Frequency
View dataThe link opens in a new window or tab
POV POV
View dataThe link opens in a new window or tab
React React
View dataThe link opens in a new window or tab
Resistor Color Trio Resistor Color Trio
View dataThe link opens in a new window or tab
Robot Name Robot Name
View dataThe link opens in a new window or tab
Satellite Satellite
View dataThe link opens in a new window or tab
Simple Cipher Simple Cipher
View dataThe link opens in a new window or tab
State of Tic-Tac-Toe State of Tic-Tac-Toe
View dataThe link opens in a new window or tab
Tree Building Tree Building
View dataThe link opens in a new window or tab
Twelve Days Twelve Days
View dataThe link opens in a new window or tab
Zipper Zipper
View dataThe link opens in a new window or tab

Programming Tags

Learn More

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

0 tags

Test Runner

Learn More

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

Current version: 148aec5afe3b640a0d0749c044217a5ee51541e2 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. Roc is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
6,218
Test Run Pass Rate
28.4% (1768)
Test Run Fail Rate
16.7% (1041)
Test Run Error Rate
54.8% (3409)

Representer

Learn More

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

Learn More

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

Next goal: Build an Analyzer. Find out more.