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Ruby Track Management

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

Students

62,961

Submissions

2,331,128

Mentoring Discussions

36,889

The Ruby track is healthy ✅

Building

Ruby syllabus

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Help create the track syllabus: is a set of concepts and learning exercises put together to teach foundational elements of the programming language.

Next goal: Create a complete syllabus with at least 30 concepts. Find out more.

21 concepts being taught

Basics

17,165 learnt

Instance Variables

12,194 learnt

Nil

12,194 learnt

Booleans

10,434 learnt

Strings

11,344 learnt

Conditionals

8,302 learnt

Floating Point Numbers

8,302 learnt

Numbers

8,302 learnt

Loops

6,347 learnt

Modules

6,347 learnt

Symbols

3,858 learnt

Ranges

3,306 learnt

Case

2,642 learnt

Arrays

5,419 learnt

Enumeration

5,419 learnt

Advanced Enumeration

4,620 learnt

Ostruct

3,986 learnt

Multiple Assignment and Decomposition

2,478 learnt

Namespaces

361 learnt

Ternary operator

3,934 learnt

Raising Exceptions

5,455 learnt

16 active learning exercises

Started

Attempts

Completions

Mentoring requests

Lasagna

21,996

118,501 (avg. 5.4)

17,165 (78.0%)

238 (1.1%)

Amusement Park

13,274

60,712 (avg. 4.6)

12,194 (91.9%)

127 (1.0%)

Amusement Park Improvements

10,930

66,173 (avg. 6.1)

10,434 (95.5%)

91 (0.8%)

Log line Parser

13,423

157,336 (avg. 11.7)

11,344 (84.5%)

323 (2.4%)

Assembly Line

8,919

67,336 (avg. 7.5)

8,302 (93.1%)

118 (1.3%)

Savings Account

7,215

94,246 (avg. 13.1)

6,347 (88.0%)

91 (1.3%)

Port Of Palermo

4,091

28,219 (avg. 6.9)

3,858 (94.3%)

37 (0.9%)

Chess Game

3,494

45,347 (avg. 13.0)

3,306 (94.6%)

38 (1.1%)

BlackJack

2,878

31,997 (avg. 11.1)

2,642 (91.8%)

44 (1.5%)

Bird Count

5,625

39,397 (avg. 7.0)

5,419 (96.3%)

46 (0.8%)

Boutique Inventory

4,938

86,100 (avg. 17.4)

4,620 (93.6%)

66 (1.3%)

Boutique Inventory Improvements

4,286

38,957 (avg. 9.1)

3,986 (93.0%)

43 (1.0%)

Locomotive Engineer

2,827

33,256 (avg. 11.8)

2,478 (87.7%)

31 (1.1%)

Last Will

406

1,859 (avg. 4.6)

361 (88.9%)

4 (1.0%)

Moviegoer

4,025

27,294 (avg. 6.8)

3,934 (97.7%)

30 (0.7%)

Simple Calculator

7,099

119,228 (avg. 16.8)

5,455 (76.8%)

167 (2.4%)

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: 95858f25da5b58952aa5eabfc021a515c7ce9fc6 (Updates should be instant)

Next goal: Implement 140 practice exercises. Find out more.

105 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

47,040

78,302 (avg. 1.7)

39,981 (85.0%)

112 (0.2%)

Two Fer

15,178

70,032 (avg. 4.6)

12,652 (83.4%)

3,862 (25.4%)

Resistor Color Duo

7,000

34,194 (avg. 4.9)

5,797 (82.8%)

1,616 (23.1%)

Acronym

9,468

49,340 (avg. 5.2)

8,000 (84.5%)

2,207 (23.3%)

High Scores

6,180

26,924 (avg. 4.4)

5,311 (85.9%)

1,390 (22.5%)

Reverse String

2,516

9,551 (avg. 3.8)

1,965 (78.1%)

43 (1.7%)

D&D Character

1,796

15,343 (avg. 8.5)

1,197 (66.6%)

48 (2.7%)

Matrix

5,545

35,082 (avg. 6.3)

4,489 (81.0%)

1,173 (21.2%)

Series

5,304

31,106 (avg. 5.9)

4,542 (85.6%)

865 (16.3%)

Word Count

7,118

43,850 (avg. 6.2)

5,897 (82.8%)

2,017 (28.3%)

Eliud's Eggs

1,250

4,882 (avg. 3.9)

995 (79.6%)

23 (1.8%)

Hamming

13,117

34,758 (avg. 2.6)

12,320 (93.9%)

3,358 (25.6%)

Raindrops

9,460

31,079 (avg. 3.3)

8,906 (94.1%)

1,434 (15.2%)

Isogram

5,084

34,156 (avg. 6.7)

4,472 (88.0%)

650 (12.8%)

Scrabble Score

3,639

20,855 (avg. 5.7)

3,176 (87.3%)

547 (15.0%)

Luhn

3,654

42,208 (avg. 11.6)

2,780 (76.1%)

402 (11.0%)

Clock

3,329

33,039 (avg. 9.9)

2,461 (73.9%)

390 (11.7%)

Twelve Days

2,754

17,097 (avg. 6.2)

1,990 (72.3%)

252 (9.2%)

Tournament

4,235

64,324 (avg. 15.2)

2,074 (49.0%)

285 (6.7%)

Gigasecond

11,104

16,691 (avg. 1.5)

9,947 (89.6%)

1,168 (10.5%)

Resistor Color

2,783

7,518 (avg. 2.7)

2,452 (88.1%)

115 (4.1%)

RNA Transcription

10,057

26,346 (avg. 2.6)

9,345 (92.9%)

1,640 (16.3%)

Leap

6,157

15,284 (avg. 2.5)

5,437 (88.3%)

706 (11.5%)

Pangram

5,878

18,764 (avg. 3.2)

5,403 (91.9%)

638 (10.9%)

Space Age

3,154

12,930 (avg. 4.1)

2,712 (86.0%)

247 (7.8%)

Triangle

2,370

15,356 (avg. 6.5)

2,036 (85.9%)

135 (5.7%)

Difference of Squares

6,601

14,205 (avg. 2.2)

6,272 (95.0%)

942 (14.3%)

Anagram

3,036

13,890 (avg. 4.6)

2,685 (88.4%)

718 (23.6%)

Spiral Matrix

589

5,915 (avg. 10.0)

358 (60.8%)

14 (2.4%)

Sum of Multiples

2,887

13,017 (avg. 4.5)

2,427 (84.1%)

148 (5.1%)

Transpose

1,458

23,503 (avg. 16.1)

841 (57.7%)

38 (2.6%)

Armstrong Numbers

1,596

6,220 (avg. 3.9)

1,365 (85.5%)

28 (1.8%)

Flatten Array

2,925

7,343 (avg. 2.5)

2,357 (80.6%)

113 (3.9%)

Phone Number

2,766

19,753 (avg. 7.1)

2,277 (82.3%)

174 (6.3%)

Grains

3,948

9,710 (avg. 2.5)

3,612 (91.5%)

629 (15.9%)

Resistor Color Trio

1,029

8,873 (avg. 8.6)

863 (83.9%)

27 (2.6%)

Saddle Points

1,164

6,994 (avg. 6.0)

916 (78.7%)

34 (2.9%)

ETL

2,184

5,267 (avg. 2.4)

1,925 (88.1%)

126 (5.8%)

Nucleotide Count

1,712

9,194 (avg. 5.4)

1,482 (86.6%)

277 (16.2%)

Pythagorean Triplet

1,004

6,822 (avg. 6.8)

690 (68.7%)

24 (2.4%)

Collatz Conjecture

1,333

6,029 (avg. 4.5)

1,129 (84.7%)

39 (2.9%)

Sieve

3,779

9,559 (avg. 2.5)

3,446 (91.2%)

287 (7.6%)

Proverb

1,182

7,172 (avg. 6.1)

1,002 (84.8%)

99 (8.4%)

Palindrome Products

1,159

7,917 (avg. 6.8)

722 (62.3%)

34 (2.9%)

Parallel Letter Frequency

377

3,918 (avg. 10.4)

201 (53.3%)

10 (2.7%)

Bob

5,310

21,570 (avg. 4.1)

4,780 (90.0%)

3,178 (59.8%)

Nth Prime

3,185

9,112 (avg. 2.9)

2,850 (89.5%)

247 (7.8%)

Perfect Numbers

725

2,873 (avg. 4.0)

596 (82.2%)

13 (1.8%)

Alphametics

1,084

5,559 (avg. 5.1)

419 (38.7%)

32 (3.0%)

Binary Search

876

4,407 (avg. 5.0)

665 (75.9%)

29 (3.3%)

Two Bucket

1,187

6,729 (avg. 5.7)

419 (35.3%)

28 (2.4%)

Matching Brackets

949

4,205 (avg. 4.4)

684 (72.1%)

27 (2.8%)

All Your Base

767

6,112 (avg. 8.0)

511 (66.6%)

13 (1.7%)

Allergies

753

3,881 (avg. 5.2)

573 (76.1%)

21 (2.8%)

Rail Fence Cipher

700

3,723 (avg. 5.3)

402 (57.4%)

11 (1.6%)

Run-Length Encoding

1,775

7,150 (avg. 4.0)

1,456 (82.0%)

89 (5.0%)

Flower Field

106

889 (avg. 8.4)

76 (71.7%)

4 (3.8%)

Robot Simulator

798

5,467 (avg. 6.9)

573 (71.8%)

31 (3.9%)

Bottle Song

218

2,379 (avg. 10.9)

166 (76.1%)

8 (3.7%)

Protein Translation

865

7,943 (avg. 9.2)

691 (79.9%)

27 (3.1%)

Wordy

919

8,359 (avg. 9.1)

636 (69.2%)

33 (3.6%)

Secret Handshake

682

3,166 (avg. 4.6)

521 (76.4%)

24 (3.5%)

Atbash Cipher

884

6,639 (avg. 7.5)

729 (82.5%)

26 (2.9%)

Crypto Square

1,116

5,943 (avg. 5.3)

835 (74.8%)

28 (2.5%)

List Ops

801

6,504 (avg. 8.1)

527 (65.8%)

11 (1.4%)

Robot Name

2,908

4,990 (avg. 1.7)

2,513 (86.4%)

492 (16.9%)

Simple Cipher

912

6,965 (avg. 7.6)

586 (64.3%)

27 (3.0%)

Dominoes

409

2,529 (avg. 6.2)

211 (51.6%)

9 (2.2%)

Pig Latin

682

5,138 (avg. 7.5)

468 (68.6%)

24 (3.5%)

Simple Linked List

920

8,502 (avg. 9.2)

605 (65.8%)

35 (3.8%)

Binary Search Tree

1,346

5,628 (avg. 4.2)

981 (72.9%)

99 (7.4%)

Change

599

4,781 (avg. 8.0)

294 (49.1%)

17 (2.8%)

Circular Buffer

654

4,024 (avg. 6.2)

479 (73.2%)

23 (3.5%)

Grade School

2,007

5,068 (avg. 2.5)

1,651 (82.3%)

218 (10.9%)

Roman Numerals

3,958

9,142 (avg. 2.3)

3,519 (88.9%)

322 (8.1%)

Rotational Cipher

760

5,639 (avg. 7.4)

601 (79.1%)

20 (2.6%)

Affine Cipher

486

3,680 (avg. 7.6)

311 (64.0%)

9 (1.9%)

Kindergarten Garden

604

3,636 (avg. 6.0)

442 (73.2%)

18 (3.0%)

Largest Series Product

584

3,301 (avg. 5.7)

468 (80.1%)

13 (2.2%)

Prime Factors

1,393

3,694 (avg. 2.7)

1,219 (87.5%)

60 (4.3%)

Custom Set

442

2,062 (avg. 4.7)

318 (71.9%)

10 (2.3%)

House

683

2,911 (avg. 4.3)

516 (75.5%)

32 (4.7%)

Linked List

577

1,449 (avg. 2.5)

394 (68.3%)

23 (4.0%)

Poker

446

2,741 (avg. 6.1)

203 (45.5%)

18 (4.0%)

ISBN Verifier

979

9,371 (avg. 9.6)

747 (76.3%)

35 (3.6%)

Complex Numbers

443

2,625 (avg. 5.9)

280 (63.2%)

11 (2.5%)

Meetup

2,400

10,316 (avg. 4.3)

901 (37.5%)

77 (3.2%)

Diamond

976

9,732 (avg. 10.0)

637 (65.3%)

32 (3.3%)

Bowling

1,551

18,649 (avg. 12.0)

694 (44.7%)

46 (3.0%)

OCR Numbers

459

2,274 (avg. 5.0)

324 (70.6%)

8 (1.7%)

Say

663

3,007 (avg. 4.5)

456 (68.8%)

16 (2.4%)

Zipper

334

1,155 (avg. 3.5)

161 (48.2%)

2 (0.6%)

Grep

531

4,105 (avg. 7.7)

269 (50.7%)

9 (1.7%)

Food Chain

1,067

3,366 (avg. 3.2)

891 (83.5%)

55 (5.2%)

Pascal's Triangle

426

1,359 (avg. 3.2)

317 (74.4%)

12 (2.8%)

Queen Attack

700

2,246 (avg. 3.2)

538 (76.9%)

24 (3.4%)

Yacht

244

2,445 (avg. 10.0)

148 (60.7%)

10 (4.1%)

Book Store

705

4,967 (avg. 7.0)

256 (36.3%)

13 (1.8%)

Connect

404

1,903 (avg. 4.7)

190 (47.0%)

7 (1.7%)

Microwave

2,377

18,049 (avg. 7.6)

1,167 (49.1%)

76 (3.2%)

Darts

1,154

4,130 (avg. 3.6)

883 (76.5%)

35 (3.0%)

Bank Account

371

2,854 (avg. 7.7)

236 (63.6%)

12 (3.2%)

Gilded Rose

241

3,144 (avg. 13.0)

101 (41.9%)

10 (4.1%)

Knapsack

207

1,675 (avg. 8.1)

97 (46.9%)

5 (2.4%)

Zebra Puzzle

201

1,109 (avg. 5.5)

76 (37.8%)

1 (0.5%)

10 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Accumulate

1,813

3,341 (avg. 1.8)

1,572 (86.7%)

172 (9.5%)

Beer Song

1,606

9,109 (avg. 5.7)

1,276 (79.5%)

176 (11.0%)

Binary

1,354

1,998 (avg. 1.5)

1,258 (92.9%)

128 (9.5%)

Hexadecimal

423

580 (avg. 1.4)

386 (91.3%)

25 (5.9%)

Minesweeper

582

3,373 (avg. 5.8)

382 (65.6%)

8 (1.4%)

Octal

23 (avg. 1.6)

11 (78.6%)

0 (0.0%)

Point Mutations

143 (avg. 2.5)

55 (96.5%)

44 (77.2%)

Scale Generator

508

1,949 (avg. 3.8)

268 (52.8%)

10 (2.0%)

Strain

1,381

2,311 (avg. 1.7)

1,176 (85.2%)

97 (7.0%)

Trinary

785

1,060 (avg. 1.4)

746 (95.0%)

49 (6.2%)

35 unimplemented practice exercises

Baffling Birthdays

View data

Camicia

View data

Conway's Game of Life

DOT DSL

Error Handling

Forth

Go Counting

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Line Up

Markdown

Micro Blog

PaaS I/O

Piecing It Together

POV

Prism

Rational Numbers

React

Rectangles

Relative Distance

Resistor Color Tolerance

REST API

Satellite

Save the Cow

SGF Parsing

Split-Second Stopwatch

Square Root

State of Tic-Tac-Toe

Sublist

Swift Scheduling

Tree Building

Variable Length Quantity

View data

Word Search

View data

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: 90819642a241bdc81314be2a621518f7afe0b554 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 3. Ruby is currently utilising a Version 2 Test Runner. Find out more.

Total Test Runner Runs

2,214,358

Test Run Pass Rate

20.0% (443081)

Test Run Fail Rate

67.4% (1492273)

Test Run Error Rate

12.6% (279004)

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.

Current version: 9f6ea2e87e26fafaf8185af5e0a66872a92dd836 (Takes up to 10 mins to deploy)

Total Representer Runs

424,013

Total Representation Comments Made

69,779

Feedback Given Frequency

16.5%

Analyzer

Learn More

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

Current version: 5813a2f9863f9691f3e243bcb765da60acd7f6bf (Takes up to 10 mins to deploy)

Total Analyzer Runs

401,250

Total Analysis Comments Made

15,643

Feedback Given Frequency

0.7%

2789 Volunteers

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