CoffeeScript 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: ae55f2bb3de5d258cb880abcdc3e1d12b0080a81 (Updates should be instant)

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

97 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

1,110

1,612 (avg. 1.5)

645 (58.1%)

2 (0.2%)

Acronym

76

229 (avg. 3.0)

18 (23.7%)

0 (0.0%)

All Your Base

7

24 (avg. 3.4)

6 (85.7%)

0 (0.0%)

Allergies

11

41 (avg. 3.7)

8 (72.7%)

0 (0.0%)

Anagram

163

551 (avg. 3.4)

135 (82.8%)

5 (3.1%)

Armstrong Numbers

15

41 (avg. 2.7)

11 (73.3%)

0 (0.0%)

Bank Account

11

48 (avg. 4.4)

7 (63.6%)

0 (0.0%)

Binary Search

14

86 (avg. 6.1)

9 (64.3%)

0 (0.0%)

Bottle Song

17

134 (avg. 7.9)

10 (58.8%)

1 (5.9%)

Circular Buffer

10

22 (avg. 2.2)

7 (70.0%)

0 (0.0%)

Clock

46

162 (avg. 3.5)

33 (71.7%)

0 (0.0%)

Collatz Conjecture

13

33 (avg. 2.5)

10 (76.9%)

0 (0.0%)

Conway's Game of Life

6

8 (avg. 1.3)

5 (83.3%)

0 (0.0%)

D&D Character

8

25 (avg. 3.1)

7 (87.5%)

0 (0.0%)

Darts

14

40 (avg. 2.9)

11 (78.6%)

0 (0.0%)

Difference of Squares

14

48 (avg. 3.4)

13 (92.9%)

0 (0.0%)

Eliud's Eggs

10

15 (avg. 1.5)

9 (90.0%)

0 (0.0%)

ETL

9

33 (avg. 3.7)

8 (88.9%)

0 (0.0%)

Flatten Array

8

28 (avg. 3.5)

8 (100.0%)

0 (0.0%)

Food Chain

6

10 (avg. 1.7)

5 (83.3%)

0 (0.0%)

Gigasecond

8

17 (avg. 2.1)

7 (87.5%)

0 (0.0%)

Grains

11

53 (avg. 4.8)

10 (90.9%)

0 (0.0%)

Hamming

9

25 (avg. 2.8)

8 (88.9%)

0 (0.0%)

High Scores

10

25 (avg. 2.5)

8 (80.0%)

0 (0.0%)

ISBN Verifier

7

14 (avg. 2.0)

7 (100.0%)

0 (0.0%)

Isogram

9

24 (avg. 2.7)

8 (88.9%)

0 (0.0%)

Leap

31

61 (avg. 2.0)

28 (90.3%)

0 (0.0%)

Line Up

5

14 (avg. 2.8)

5 (100.0%)

0 (0.0%)

Linked List

39

229 (avg. 5.9)

31 (79.5%)

0 (0.0%)

List Ops

9

57 (avg. 6.3)

8 (88.9%)

0 (0.0%)

Luhn

82

424 (avg. 5.2)

73 (89.0%)

0 (0.0%)

Matching Brackets

9

25 (avg. 2.8)

8 (88.9%)

0 (0.0%)

Matrix

10

33 (avg. 3.3)

8 (80.0%)

0 (0.0%)

Micro Blog

9

26 (avg. 2.9)

8 (88.9%)

0 (0.0%)

Nucleotide Count

44

233 (avg. 5.3)

37 (84.1%)

3 (6.8%)

Palindrome Products

52

220 (avg. 4.2)

41 (78.8%)

3 (5.8%)

Pangram

10

60 (avg. 6.0)

8 (80.0%)

0 (0.0%)

Pascal's Triangle

86

407 (avg. 4.7)

72 (83.7%)

0 (0.0%)

Perfect Numbers

10

32 (avg. 3.2)

8 (80.0%)

0 (0.0%)

Phone Number

18

113 (avg. 6.3)

15 (83.3%)

0 (0.0%)

Prime Factors

8

13 (avg. 1.6)

8 (100.0%)

0 (0.0%)

Protein Translation

10

66 (avg. 6.6)

8 (80.0%)

0 (0.0%)

Proverb

8

39 (avg. 4.9)

7 (87.5%)

0 (0.0%)

Queen Attack

178

529 (avg. 3.0)

55 (30.9%)

3 (1.7%)

Raindrops

15

87 (avg. 5.8)

12 (80.0%)

0 (0.0%)

Resistor Color

10

16 (avg. 1.6)

9 (90.0%)

0 (0.0%)

Resistor Color Duo

10

12 (avg. 1.2)

9 (90.0%)

0 (0.0%)

Resistor Color Trio

6

11 (avg. 1.8)

5 (83.3%)

0 (0.0%)

Reverse String

13

34 (avg. 2.6)

12 (92.3%)

0 (0.0%)

RNA Transcription

19

69 (avg. 3.6)

17 (89.5%)

0 (0.0%)

Robot Simulator

8

18 (avg. 2.3)

7 (87.5%)

0 (0.0%)

Roman Numerals

11

35 (avg. 3.2)

8 (72.7%)

0 (0.0%)

Rotational Cipher

9

11 (avg. 1.2)

8 (88.9%)

0 (0.0%)

Saddle Points

5

4 (avg. 0.8)

4 (80.0%)

0 (0.0%)

Scrabble Score

19

183 (avg. 9.6)

17 (89.5%)

1 (5.3%)

Secret Handshake

9

20 (avg. 2.2)

8 (88.9%)

0 (0.0%)

Series

9

21 (avg. 2.3)

8 (88.9%)

0 (0.0%)

Sieve

8

42 (avg. 5.3)

7 (87.5%)

0 (0.0%)

Space Age

10

34 (avg. 3.4)

8 (80.0%)

0 (0.0%)

Square Root

8

15 (avg. 1.9)

6 (75.0%)

0 (0.0%)

State of Tic-Tac-Toe

5

5 (avg. 1.0)

3 (60.0%)

0 (0.0%)

Strain

9

13 (avg. 1.4)

8 (88.9%)

0 (0.0%)

Sublist

7

25 (avg. 3.6)

7 (100.0%)

0 (0.0%)

Sum of Multiples

9

40 (avg. 4.4)

9 (100.0%)

0 (0.0%)

Triangle

96

448 (avg. 4.7)

88 (91.7%)

4 (4.2%)

Twelve Days

6

10 (avg. 1.7)

5 (83.3%)

0 (0.0%)

Two Fer

32

102 (avg. 3.2)

23 (71.9%)

1 (3.1%)

Word Count

214

497 (avg. 2.3)

199 (93.0%)

15 (7.0%)

Yacht

8

46 (avg. 5.8)

6 (75.0%)

0 (0.0%)

Atbash Cipher

35

124 (avg. 3.5)

31 (88.6%)

1 (2.9%)

Binary Search Tree

62

122 (avg. 2.0)

58 (93.5%)

4 (6.5%)

Bob

384

743 (avg. 1.9)

350 (91.1%)

83 (21.6%)

Camicia

4

5 (avg. 1.3)

2 (50.0%)

0 (0.0%)

Custom Set

7

66 (avg. 9.4)

6 (85.7%)

0 (0.0%)

Diamond

6

11 (avg. 1.8)

5 (83.3%)

0 (0.0%)

Grade School

8

51 (avg. 6.4)

7 (87.5%)

0 (0.0%)

House

6

16 (avg. 2.7)

5 (83.3%)

0 (0.0%)

Kindergarten Garden

9

11 (avg. 1.2)

8 (88.9%)

0 (0.0%)

Knapsack

7

5 (avg. 0.7)

5 (71.4%)

0 (0.0%)

Largest Series Product

8

20 (avg. 2.5)

7 (87.5%)

0 (0.0%)

Meetup

7

17 (avg. 2.4)

4 (57.1%)

0 (0.0%)

Nth Prime

56

136 (avg. 2.4)

49 (87.5%)

4 (7.1%)

Pig Latin

8

35 (avg. 4.4)

6 (75.0%)

0 (0.0%)

Prism

3

3 (avg. 1.0)

2 (66.7%)

0 (0.0%)

Relative Distance

5

11 (avg. 2.2)

4 (80.0%)

0 (0.0%)

Run-Length Encoding

7

14 (avg. 2.0)

5 (71.4%)

0 (0.0%)

Satellite

2

2 (avg. 1.0)

1 (50.0%)

0 (0.0%)

Say

4

7 (avg. 1.8)

3 (75.0%)

0 (0.0%)

Spiral Matrix

7

29 (avg. 4.1)

5 (71.4%)

0 (0.0%)

Split-Second Stopwatch

3

3 (avg. 1.0)

2 (66.7%)

0 (0.0%)

Transpose

3

2 (avg. 0.7)

2 (66.7%)

0 (0.0%)

Two Bucket

7

16 (avg. 2.3)

4 (57.1%)

0 (0.0%)

Wordy

40

186 (avg. 4.7)

35 (87.5%)

0 (0.0%)

Change

4

6 (avg. 1.5)

3 (75.0%)

0 (0.0%)

Flower Field

4

3 (avg. 0.8)

3 (75.0%)

0 (0.0%)

Parallel Letter Frequency

2

3 (avg. 1.5)

1 (50.0%)

0 (0.0%)

Simple Linked List

7

11 (avg. 1.6)

5 (71.4%)

0 (0.0%)

6 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Accumulate

151

225 (avg. 1.5)

143 (94.7%)

9 (6.0%)

Beer Song

43

81 (avg. 1.9)

31 (72.1%)

2 (4.7%)

Binary

148

376 (avg. 2.5)

138 (93.2%)

10 (6.8%)

Hexadecimal

96

177 (avg. 1.8)

91 (94.8%)

6 (6.3%)

Minesweeper

7

5 (avg. 0.7)

4 (57.1%)

0 (0.0%)

Trinary

102

128 (avg. 1.3)

99 (97.1%)

1 (1.0%)

41 unimplemented practice exercises

Affine Cipher

Alphametics

Baffling Birthdays

Book Store

Bowling

Complex Numbers

Connect

Crypto Square

Dominoes

DOT DSL

Error Handling

Forth

Go Counting

Grep

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Markdown

OCR Numbers

PaaS I/O

Piecing It Together

Poker

POV

Pythagorean Triplet

Rail Fence Cipher

Rational Numbers

React

Rectangles

REST API

Robot Name

Save the Cow

SGF Parsing

Simple Cipher

Swift Scheduling

Tournament

Tree Building

Variable Length Quantity

Word Search

Zebra Puzzle

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: fe2ab20750a6031a13c6d74948c98bc03d990176 (Takes up to 10 mins to deploy)

Total Test Runner Runs

9,568

Test Run Pass Rate

33.4% (3197)

Test Run Fail Rate

49.9% (4776)

Test Run Error Rate

16.7% (1595)

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

Next goal: Build an Analyzer. Find out more.

CoffeeScript Track Management

The CoffeeScript 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

CoffeeScript Track Management

The CoffeeScript track needs attention ⚠️

Practice Exercises

Test Runner

Representer

Analyzer

We 💙 our volunteers