Racket impact and status on Exercism

Practice Exercises

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: 3e7dda0b719d733bf8553e2e11079f567227879f (Updates should be instant)

Next goal: Implement 138 practice exercises. Find out more.

84 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

3,114

4,725 (avg. 1.5)

2,546 (81.8%)

3 (0.1%)

Acronym

675

1,934 (avg. 2.9)

255 (37.8%)

17 (2.5%)

Armstrong Numbers

372

954 (avg. 2.6)

253 (68.0%)

11 (3.0%)

Atbash Cipher

166

597 (avg. 3.6)

106 (63.9%)

8 (4.8%)

Binary Search

113

391 (avg. 3.5)

75 (66.4%)

6 (5.3%)

Bob

355

1,606 (avg. 4.5)

263 (74.1%)

28 (7.9%)

Clock

81

256 (avg. 3.2)

46 (56.8%)

2 (2.5%)

Collatz Conjecture

342

1,277 (avg. 3.7)

276 (80.7%)

27 (7.9%)

D&D Character

102

351 (avg. 3.4)

65 (63.7%)

1 (1.0%)

Darts

89

183 (avg. 2.1)

69 (77.5%)

3 (3.4%)

Difference of Squares

611

1,521 (avg. 2.5)

528 (86.4%)

55 (9.0%)

Eliud's Eggs

105

214 (avg. 2.0)

94 (89.5%)

0 (0.0%)

ETL

162

395 (avg. 2.4)

123 (75.9%)

5 (3.1%)

Gigasecond

353

552 (avg. 1.6)

296 (83.9%)

32 (9.1%)

Grains

1,285

4,001 (avg. 3.1)

788 (61.3%)

148 (11.5%)

Grep

120

301 (avg. 2.5)

67 (55.8%)

4 (3.3%)

Hamming

301

680 (avg. 2.3)

248 (82.4%)

24 (8.0%)

High Scores

43

84 (avg. 2.0)

26 (60.5%)

0 (0.0%)

ISBN Verifier

11

36 (avg. 3.3)

6 (54.5%)

0 (0.0%)

Isogram

159

472 (avg. 3.0)

125 (78.6%)

6 (3.8%)

Leap

718

1,627 (avg. 2.3)

633 (88.2%)

79 (11.0%)

Line Up

13

16 (avg. 1.2)

9 (69.2%)

0 (0.0%)

List Ops

163

549 (avg. 3.4)

97 (59.5%)

7 (4.3%)

Matrix

4

5 (avg. 1.3)

4 (100.0%)

0 (0.0%)

Nth Prime

31

107 (avg. 3.5)

22 (71.0%)

1 (3.2%)

Nucleotide Count

150

371 (avg. 2.5)

123 (82.0%)

5 (3.3%)

Pangram

48

93 (avg. 1.9)

37 (77.1%)

0 (0.0%)

Protein Translation

41

96 (avg. 2.3)

27 (65.9%)

0 (0.0%)

Proverb

33

82 (avg. 2.5)

24 (72.7%)

1 (3.0%)

Queen Attack

31

63 (avg. 2.0)

22 (71.0%)

0 (0.0%)

Raindrops

155

383 (avg. 2.5)

132 (85.2%)

9 (5.8%)

Resistor Color

43

94 (avg. 2.2)

35 (81.4%)

2 (4.7%)

Resistor Color Duo

35

75 (avg. 2.1)

28 (80.0%)

1 (2.9%)

Resistor Color Trio

38

210 (avg. 5.5)

28 (73.7%)

3 (7.9%)

Reverse String

344

431 (avg. 1.3)

262 (76.2%)

4 (1.2%)

RNA Transcription

173

252 (avg. 1.5)

152 (87.9%)

6 (3.5%)

Roman Numerals

155

282 (avg. 1.8)

121 (78.1%)

6 (3.9%)

Scrabble Score

232

511 (avg. 2.2)

197 (84.9%)

22 (9.5%)

Series

2

3 (avg. 1.5)

2 (100.0%)

0 (0.0%)

Sieve

36

75 (avg. 2.1)

26 (72.2%)

0 (0.0%)

Space Age

37

65 (avg. 1.8)

26 (70.3%)

0 (0.0%)

Square Root

46

66 (avg. 1.4)

29 (63.0%)

1 (2.2%)

Strain

38

57 (avg. 1.5)

27 (71.1%)

1 (2.6%)

Triangle

60

206 (avg. 3.4)

41 (68.3%)

0 (0.0%)

Two Fer

678

2,217 (avg. 3.3)

513 (75.7%)

97 (14.3%)

Affine Cipher

97

422 (avg. 4.4)

56 (57.7%)

3 (3.1%)

All Your Base

240

524 (avg. 2.2)

122 (50.8%)

3 (1.3%)

Allergies

101

147 (avg. 1.5)

77 (76.2%)

0 (0.0%)

Alphametics

39

254 (avg. 6.5)

13 (33.3%)

4 (10.3%)

Anagram

160

312 (avg. 2.0)

133 (83.1%)

10 (6.3%)

Bowling

10

10 (avg. 1.0)

5 (50.0%)

0 (0.0%)

Circular Buffer

30

41 (avg. 1.4)

12 (40.0%)

1 (3.3%)

Diamond

18

29 (avg. 1.6)

10 (55.6%)

0 (0.0%)

Food Chain

15

73 (avg. 4.9)

7 (46.7%)

0 (0.0%)

Grade School

19

42 (avg. 2.2)

10 (52.6%)

0 (0.0%)

House

30

69 (avg. 2.3)

17 (56.7%)

0 (0.0%)

Kindergarten Garden

16

26 (avg. 1.6)

8 (50.0%)

1 (6.3%)

Knapsack

23

41 (avg. 1.8)

14 (60.9%)

1 (4.3%)

Largest Series Product

22

35 (avg. 1.6)

12 (54.5%)

2 (9.1%)

Matching Brackets

151

746 (avg. 4.9)

116 (76.8%)

2 (1.3%)

Meetup

97

168 (avg. 1.7)

51 (52.6%)

5 (5.2%)

Pascal's Triangle

22

37 (avg. 1.7)

12 (54.5%)

0 (0.0%)

Perfect Numbers

395

1,139 (avg. 2.9)

333 (84.3%)

40 (10.1%)

Phone Number

116

217 (avg. 1.9)

87 (75.0%)

1 (0.9%)

Pig Latin

15

13 (avg. 0.9)

6 (40.0%)

0 (0.0%)

Pythagorean Triplet

6

6 (avg. 1.0)

3 (50.0%)

0 (0.0%)

Robot Name

175

476 (avg. 2.7)

110 (62.9%)

3 (1.7%)

Robot Simulator

16

23 (avg. 1.4)

8 (50.0%)

0 (0.0%)

Rotational Cipher

26

40 (avg. 1.5)

15 (57.7%)

0 (0.0%)

Run-Length Encoding

15

34 (avg. 2.3)

8 (53.3%)

0 (0.0%)

Say

70

163 (avg. 2.3)

45 (64.3%)

0 (0.0%)

Secret Handshake

14

10 (avg. 0.7)

7 (50.0%)

0 (0.0%)

Spiral Matrix

15

27 (avg. 1.8)

6 (40.0%)

0 (0.0%)

Sublist

40

92 (avg. 2.3)

21 (52.5%)

3 (7.5%)

Twelve Days

58

210 (avg. 3.6)

36 (62.1%)

2 (3.4%)

Two Bucket

15

31 (avg. 2.1)

7 (46.7%)

0 (0.0%)

Word Count

136

265 (avg. 1.9)

105 (77.2%)

4 (2.9%)

Yacht

17

46 (avg. 2.7)

9 (52.9%)

0 (0.0%)

Zebra Puzzle

15

17 (avg. 1.1)

5 (33.3%)

0 (0.0%)

Bank Account

19

38 (avg. 2.0)

6 (31.6%)

0 (0.0%)

Flower Field

10

21 (avg. 2.1)

7 (70.0%)

0 (0.0%)

Luhn

23

32 (avg. 1.4)

10 (43.5%)

0 (0.0%)

Parallel Letter Frequency

18

83 (avg. 4.6)

9 (50.0%)

0 (0.0%)

Variable Length Quantity

60

173 (avg. 2.9)

25 (41.7%)

2 (3.3%)

3 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Accumulate

5

6 (avg. 1.2)

3 (60.0%)

1 (20.0%)

Minesweeper

14

29 (avg. 2.1)

5 (35.7%)

0 (0.0%)

Pythagorean Triplets

13

23 (avg. 1.8)

6 (46.2%)

1 (7.7%)

54 unimplemented practice exercises

Baffling Birthdays

Binary Search Tree

Book Store

Bottle Song

Camicia

Change

Complex Numbers

Connect

Conway's Game of Life

Crypto Square

Custom Set

Dominoes

DOT DSL

Error Handling

Flatten Array

Forth

Go Counting

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Linked List

Markdown

Micro Blog

OCR Numbers

PaaS I/O

Palindrome Products

Piecing It Together

Poker

POV

Prime Factors

Prism

Rail Fence Cipher

Rational Numbers

React

Rectangles

Relative Distance

REST API

Saddle Points

Satellite

Save the Cow

SGF Parsing

Simple Cipher

Simple Linked List

Split-Second Stopwatch

State of Tic-Tac-Toe

Sum of Multiples

Swift Scheduling

Tournament

Transpose

Tree Building

Word Search

Wordy

Zipper

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: d9c21f00e9c2061fb8c5c74ec1d8dc58377cc777 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. Racket is currently utilising a Version 1 Test Runner. Find out more.

Total Test Runner Runs

33,063

Test Run Pass Rate

39.0% (12886)

Test Run Fail Rate

58.0% (19179)

Test Run Error Rate

3.0% (998)

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 Racket: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.

Racket Track Management

The Racket track needs attention ⚠️

Practice Exercises

Test Runner

Representer

Analyzer

We 💙 our volunteers

Language Tracks

Learn To Code with Jiki

Your Journey

Your FavoritesNew

Exercism Perks

Community Videos

Brief Introduction Series

Interviews & Stories

Discord

Forum

Getting started

Mentoring

Docs

Contributors

TranslatorsNew

Donate

About Exercism

Our Impact

GitHub SyncerNew

Insiders

Racket Track Management

The Racket track needs attention ⚠️

Practice Exercises

Test Runner

Representer

Analyzer

We 💙 our volunteers