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Exercises

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24 contributors

39 mentors

654
students have developed their D skills on Exercism.

Students

654

Submissions

3,349

Mentoring Discussions

The D track needs attention ⚠️

Building

Build

Use your knowledge to build the D track itself

24 contributors

Build Test Runners

Learn More

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

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

Usage statistics

Total Test Runner Runs

2,697

Test Run Pass Rate

37.3% (1006)

Test Run Fail Rate

41.8% (1126)

Test Run Error Rate

20.9% (565)

Build Analyzers

Learn More

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

Next goal: Build an Analyzer. Find out more.

Build Representers

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.

Create 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.

Next goal: Implement at least 40 practice exercises. Find out more.

Usage statistics

34 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

388

493 (avg. 1.3)

316 (81.4%)

0 (0.0%)

Armstrong Numbers

104

327 (avg. 3.1)

53 (51.0%)

3 (2.9%)

Collatz Conjecture

287 (avg. 4.5)

48 (75.0%)

1 (1.6%)

Darts

137 (avg. 3.3)

35 (83.3%)

0 (0.0%)

Gigasecond

119

156 (avg. 1.3)

101 (84.9%)

6 (5.0%)

Isogram

85 (avg. 2.8)

24 (80.0%)

1 (3.3%)

Leap

156

216 (avg. 1.4)

117 (75.0%)

15 (9.6%)

Luhn

152 (avg. 8.0)

15 (78.9%)

1 (5.3%)

Matching Brackets

48 (avg. 2.3)

15 (71.4%)

1 (4.8%)

Nth Prime

36 (avg. 2.0)

12 (66.7%)

0 (0.0%)

Pangram

87 (avg. 2.5)

29 (82.9%)

2 (5.7%)

Prime Factors

43 (avg. 2.3)

13 (68.4%)

0 (0.0%)

Raindrops

105 (avg. 1.5)

63 (88.7%)

2 (2.8%)

Resistor Color Duo

37 (avg. 2.3)

13 (81.3%)

1 (6.3%)

Sum of Multiples

71 (avg. 4.2)

13 (76.5%)

0 (0.0%)

Two Fer

65 (avg. 2.6)

23 (92.0%)

0 (0.0%)

Bob

122 (avg. 2.2)

44 (78.6%)

2 (3.6%)

Difference of Squares

58 (avg. 1.6)

30 (81.1%)

2 (5.4%)

ETL

59 (avg. 1.3)

39 (84.8%)

3 (6.5%)

Hamming

79 (avg. 1.6)

39 (81.3%)

1 (2.1%)

Resistor Color

39 (avg. 2.1)

15 (78.9%)

0 (0.0%)

Reverse String

60 (avg. 2.6)

19 (82.6%)

0 (0.0%)

RNA Transcription

130 (avg. 1.6)

70 (86.4%)

3 (3.7%)

Triangle

49 (avg. 1.6)

25 (83.3%)

1 (3.3%)

Crypto Square

31 (avg. 1.5)

13 (61.9%)

1 (4.8%)

Nucleotide Count

79 (avg. 1.9)

31 (75.6%)

2 (4.9%)

Perfect Numbers

36 (avg. 2.4)

12 (80.0%)

0 (0.0%)

Robot Name

52 (avg. 1.4)

28 (75.7%)

2 (5.4%)

Roman Numerals

58 (avg. 1.6)

28 (75.7%)

2 (5.4%)

Series

41 (avg. 1.3)

25 (78.1%)

1 (3.1%)

Circular Buffer

31 (avg. 1.1)

15 (55.6%)

1 (3.7%)

Grains

51 (avg. 2.7)

14 (73.7%)

0 (0.0%)

Run-Length Encoding

20 (avg. 1.5)

8 (61.5%)

0 (0.0%)

React

9 (avg. 0.4)

3 (12.0%)

0 (0.0%)

94 unimplemented practice exercises

Acronym

Affine Cipher

All Your Base

Allergies

Alphametics

Anagram

Atbash Cipher

Bank Account

Binary Search

Binary Search Tree

Book Store

Bottle Song

Bowling

Change

Clock

Complex Numbers

Connect

Custom Set

D&D Character

DOT DSL

Diamond

Dominoes

Error Handling

Flatten Array

Food Chain

Forth

Go Counting

Grade School

Grep

Hangman

High Scores

House

ISBN Verifier

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Largest Series Product

Ledger

Lens Person

Linked List

List Ops

Markdown

Matrix

Meetup

Micro Blog

Minesweeper

OCR Numbers

POV

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Pascal's Triangle

Phone Number

Pig Latin

Poker

Protein Translation

Proverb

Pythagorean Triplet

Queen Attack

REST API

Rail Fence Cipher

Rational Numbers

Rectangles

Resistor Color Trio

Robot Simulator

Rotational Cipher

SGF Parsing

Saddle Points

Satellite

Say

Scale Generator

Scrabble Score

Secret Handshake

Sieve

Simple Cipher

Simple Linked List

Space Age

Spiral Matrix

Square Root

State of Tic-Tac-Toe

Strain

Sublist

Tournament

Transpose

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

Word Count

Word Search

Wordy

Yacht

Zebra Puzzle

Zipper

Volunteers

amscotti

758

kytrinyx

699

ErikSchierboom

557

+ 16 more

We 💙 our volunteers

Exercism relies on open-source volunteers to build our language tracks and mentor students.

Become an Exercism Volunteer

654 students have developed their D skills on Exercism.

The D track needs attention ⚠️

Build

Build Test Runners

Usage statistics

Build Analyzers

Build Representers

Create Practice Exercises

Usage statistics

We 💙 our volunteers

654
students have developed their D skills on Exercism.