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D Track Management

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

Students
880
Submissions
7,139
Mentoring Discussions
73

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Practice Exercises

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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: 1522c17dbe8b3cee003cabd37b6ce9aef07f8858 (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
68 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
628
742 (avg. 1.2)
499 (79.5%)
0 (0.0%)
Allergies Allergies
37
195 (avg. 5.3)
16 (43.2%)
1 (2.7%)
Anagram Anagram
10
90 (avg. 9.0)
10 (100.0%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
176
613 (avg. 3.5)
91 (51.7%)
8 (4.5%)
Collatz Conjecture Collatz Conjecture
109
507 (avg. 4.7)
82 (75.2%)
3 (2.8%)
Darts Darts
70
218 (avg. 3.1)
59 (84.3%)
1 (1.4%)
Gigasecond Gigasecond
140
193 (avg. 1.4)
119 (85.0%)
7 (5.0%)
Isbn Verifier Isbn Verifier
6
31 (avg. 5.2)
6 (100.0%)
0 (0.0%)
Isogram Isogram
49
159 (avg. 3.2)
44 (89.8%)
2 (4.1%)
Leap Leap
187
286 (avg. 1.5)
151 (80.7%)
16 (8.6%)
Luhn Luhn
36
257 (avg. 7.1)
28 (77.8%)
1 (2.8%)
Sieve Sieve
7
9 (avg. 1.3)
5 (71.4%)
0 (0.0%)
Matching Brackets Matching Brackets
38
99 (avg. 2.6)
27 (71.1%)
2 (5.3%)
Nth Prime Nth Prime
32
83 (avg. 2.6)
24 (75.0%)
0 (0.0%)
Pangram Pangram
50
192 (avg. 3.8)
44 (88.0%)
3 (6.0%)
Prime Factors Prime Factors
31
66 (avg. 2.1)
24 (77.4%)
1 (3.2%)
Raindrops Raindrops
81
232 (avg. 2.9)
71 (87.7%)
2 (2.5%)
Resistor Color Duo Resistor Color Duo
25
67 (avg. 2.7)
21 (84.0%)
1 (4.0%)
Secret Handshake Secret Handshake
5
18 (avg. 3.6)
4 (80.0%)
0 (0.0%)
Square Root Square Root
7
29 (avg. 4.1)
5 (71.4%)
0 (0.0%)
Sum of Multiples Sum of Multiples
27
174 (avg. 6.4)
22 (81.5%)
0 (0.0%)
Two Fer Two Fer
38
91 (avg. 2.4)
34 (89.5%)
1 (2.6%)
Bob Bob
97
431 (avg. 4.4)
83 (85.6%)
2 (2.1%)
Difference of Squares Difference of Squares
46
101 (avg. 2.2)
39 (84.8%)
3 (6.5%)
Eliud's Eggs Eliud's Eggs
8
9 (avg. 1.1)
5 (62.5%)
1 (12.5%)
ETL ETL
52
84 (avg. 1.6)
45 (86.5%)
3 (5.8%)
Hamming Hamming
56
115 (avg. 2.1)
47 (83.9%)
1 (1.8%)
Micro Blog Micro Blog
3
23 (avg. 7.7)
2 (66.7%)
0 (0.0%)
Protein Translation Protein Translation
3
16 (avg. 5.3)
2 (66.7%)
0 (0.0%)
Resistor Color Resistor Color
31
73 (avg. 2.4)
24 (77.4%)
0 (0.0%)
Reverse String Reverse String
36
155 (avg. 4.3)
31 (86.1%)
1 (2.8%)
RNA Transcription RNA Transcription
89
150 (avg. 1.7)
78 (87.6%)
4 (4.5%)
Triangle Triangle
40
72 (avg. 1.8)
33 (82.5%)
2 (5.0%)
Crypto Square Crypto Square
30
125 (avg. 4.2)
20 (66.7%)
1 (3.3%)
Kindergarten Garden Kindergarten Garden
4
15 (avg. 3.8)
3 (75.0%)
0 (0.0%)
Nucleotide Count Nucleotide Count
47
116 (avg. 2.5)
37 (78.7%)
3 (6.4%)
Perfect Numbers Perfect Numbers
27
141 (avg. 5.2)
22 (81.5%)
1 (3.7%)
Phone Number Phone Number
3
8 (avg. 2.7)
2 (66.7%)
0 (0.0%)
Robot Name Robot Name
44
153 (avg. 3.5)
36 (81.8%)
3 (6.8%)
Roman Numerals Roman Numerals
47
100 (avg. 2.1)
36 (76.6%)
2 (4.3%)
Rotational Cipher Rotational Cipher
5
8 (avg. 1.6)
3 (60.0%)
0 (0.0%)
Series Series
40
105 (avg. 2.6)
30 (75.0%)
1 (2.5%)
Yacht Yacht
4
63 (avg. 15.8)
3 (75.0%)
0 (0.0%)
All Your Base All Your Base
6
36 (avg. 6.0)
5 (83.3%)
0 (0.0%)
Atbash Cipher Atbash Cipher
5
26 (avg. 5.2)
3 (60.0%)
0 (0.0%)
Circular Buffer Circular Buffer
39
84 (avg. 2.2)
24 (61.5%)
1 (2.6%)
Grade School Grade School
5
31 (avg. 6.2)
3 (60.0%)
0 (0.0%)
Grains Grains
30
161 (avg. 5.4)
22 (73.3%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
4
7 (avg. 1.8)
3 (75.0%)
0 (0.0%)
Pig Latin Pig Latin
3
15 (avg. 5.0)
2 (66.7%)
0 (0.0%)
D&D Character D&D Character
5
51 (avg. 10.2)
4 (80.0%)
0 (0.0%)
Largest Series Product Largest Series Product
4
13 (avg. 3.3)
4 (100.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
21
46 (avg. 2.2)
14 (66.7%)
0 (0.0%)
Game Of Life Game Of Life
3
5 (avg. 1.7)
2 (66.7%)
0 (0.0%)
Knapsack Knapsack
3
10 (avg. 3.3)
2 (66.7%)
0 (0.0%)
Minesweeper Minesweeper
4
17 (avg. 4.3)
2 (50.0%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
5
4 (avg. 0.8)
2 (40.0%)
0 (0.0%)
Scrabble Score Scrabble Score
4
12 (avg. 3.0)
3 (75.0%)
0 (0.0%)
Space Age Space Age
5
9 (avg. 1.8)
3 (60.0%)
0 (0.0%)
Binary Search Binary Search
8
20 (avg. 2.5)
5 (62.5%)
0 (0.0%)
Acronym Acronym
5
43 (avg. 8.6)
4 (80.0%)
0 (0.0%)
Robot Simulator Robot Simulator
7
8 (avg. 1.1)
3 (42.9%)
1 (14.3%)
Affine Cipher Affine Cipher
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
State of Tic-Tac-Toe State of Tic-Tac-Toe
2
13 (avg. 6.5)
1 (50.0%)
0 (0.0%)
Book Store Book Store
3
37 (avg. 12.3)
2 (66.7%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
3
26 (avg. 8.7)
2 (66.7%)
0 (0.0%)
React React
35
51 (avg. 1.5)
10 (28.6%)
0 (0.0%)
Two Bucket Two Bucket
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
61 unimplemented practice exercises
Alphametics Alphametics
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Bottle Song Bottle Song
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Bowling Bowling
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Change Change
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Clock Clock
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Complex Numbers Complex Numbers
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Connect Connect
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Custom Set Custom Set
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Diamond Diamond
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Dominoes Dominoes
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DOT DSL DOT DSL
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Error Handling Error Handling
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Flatten Array Flatten Array
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Food Chain Food Chain
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Forth Forth
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Go Counting Go Counting
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Grep Grep
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Hangman Hangman
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High Scores High Scores
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House House
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Killer Sudoku Helper Killer Sudoku Helper
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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List Ops List Ops
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Markdown Markdown
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Matrix Matrix
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Meetup Meetup
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OCR Numbers OCR Numbers
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PaaS I/O PaaS I/O
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Palindrome Products Palindrome Products
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Parallel Letter Frequency Parallel Letter Frequency
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Poker Poker
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POV POV
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Proverb Proverb
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Queen Attack Queen Attack
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Rail Fence Cipher Rail Fence Cipher
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Rational Numbers Rational Numbers
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Rectangles Rectangles
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Resistor Color Trio Resistor Color Trio
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REST API REST API
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Saddle Points Saddle Points
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Satellite Satellite
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Say Say
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SGF Parsing SGF Parsing
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Simple Cipher Simple Cipher
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Simple Linked List Simple Linked List
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Spiral Matrix Spiral Matrix
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Strain Strain
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Sublist Sublist
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Tournament Tournament
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Transpose Transpose
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Tree Building Tree Building
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Twelve Days Twelve Days
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Variable Length Quantity Variable Length Quantity
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Word Count Word Count
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Word Search Word Search
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Wordy Wordy
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Zipper Zipper
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Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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

Current version: 62be9175075ed7b16863e82e21488c7948413072 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. D is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
6,689
Test Run Pass Rate
39.5% (2644)
Test Run Fail Rate
30.3% (2028)
Test Run Error Rate
30.2% (2017)

Representer

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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

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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.