721 students

About D

Practice

24 contributors

41 mentors

721
students have developed their D skills on Exercism.

Students

721

Submissions

4,409

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

3,761

Test Run Pass Rate

43.4% (1634)

Test Run Fail Rate

37.6% (1416)

Test Run Error Rate

18.9% (711)

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

442

552 (avg. 1.2)

359 (81.2%)

0 (0.0%)

Armstrong Numbers

133

455 (avg. 3.4)

65 (48.9%)

6 (4.5%)

Collatz Conjecture

350 (avg. 4.4)

60 (75.9%)

2 (2.5%)

Darts

160 (avg. 3.0)

44 (83.0%)

1 (1.9%)

Gigasecond

128

173 (avg. 1.4)

108 (84.4%)

7 (5.5%)

Isogram

122 (avg. 3.2)

30 (78.9%)

2 (5.3%)

Leap

168

235 (avg. 1.4)

127 (75.6%)

16 (9.5%)

Luhn

201 (avg. 6.9)

22 (75.9%)

1 (3.4%)

Matching Brackets

71 (avg. 2.4)

20 (69.0%)

2 (6.9%)

Nth Prime

75 (avg. 3.0)

18 (72.0%)

0 (0.0%)

Pangram

131 (avg. 2.9)

38 (84.4%)

3 (6.7%)

Prime Factors

54 (avg. 2.2)

18 (72.0%)

1 (4.0%)

Raindrops

113 (avg. 1.5)

65 (86.7%)

2 (2.7%)

Resistor Color Duo

42 (avg. 2.1)

16 (80.0%)

1 (5.0%)

Sum of Multiples

107 (avg. 4.7)

17 (73.9%)

0 (0.0%)

Two Fer

80 (avg. 2.4)

29 (87.9%)

1 (3.0%)

Bob

136 (avg. 2.2)

48 (77.4%)

2 (3.2%)

Difference of Squares

99 (avg. 2.3)

36 (81.8%)

3 (6.8%)

ETL

64 (avg. 1.3)

41 (83.7%)

3 (6.1%)

Hamming

86 (avg. 1.7)

41 (78.8%)

1 (1.9%)

Resistor Color

64 (avg. 2.5)

19 (73.1%)

0 (0.0%)

Reverse String

87 (avg. 2.9)

24 (80.0%)

1 (3.3%)

RNA Transcription

138 (avg. 1.6)

73 (85.9%)

4 (4.7%)

Triangle

65 (avg. 1.8)

30 (83.3%)

2 (5.6%)

Crypto Square

53 (avg. 2.0)

16 (61.5%)

1 (3.8%)

Nucleotide Count

88 (avg. 2.0)

34 (75.6%)

3 (6.7%)

Perfect Numbers

133 (avg. 5.8)

18 (78.3%)

1 (4.3%)

Robot Name

66 (avg. 1.5)

33 (76.7%)

2 (4.7%)

Roman Numerals

78 (avg. 1.9)

31 (75.6%)

2 (4.9%)

Series

90 (avg. 2.4)

28 (73.7%)

1 (2.6%)

Circular Buffer

41 (avg. 1.3)

18 (58.1%)

1 (3.2%)

Grains

134 (avg. 5.2)

19 (73.1%)

0 (0.0%)

Run-Length Encoding

25 (avg. 1.6)

10 (62.5%)

0 (0.0%)

React

41 (avg. 1.3)

7 (21.9%)

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

kytrinyx

783

amscotti

758

ErikSchierboom

595

+ 16 more

We 💙 our volunteers

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

Become an Exercism Volunteer

Language Tracks

#12in23 Challenge

Your Journey

Exercism Perks

Community Videos

Brief Introduction Series

Interviews & Stories

Discord

Forum

Getting started

Mentoring

Docs

Contributors

Donate

About Exercism

Our Impact

Insiders

SWAG

721 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

721
students have developed their D skills on Exercism.