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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
960
Submissions
8,350
Mentoring Discussions
75

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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: e7a8bd3d0c53cf13419d4b686a43209252a63bb5 (Updates should be instant)

Next goal: Implement 134 practice exercises. Find out more.
74 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
717
844 (avg. 1.2)
568 (79.2%)
0 (0.0%)
Allergies Allergies
67
357 (avg. 5.3)
22 (32.8%)
2 (3.0%)
Anagram Anagram
17
144 (avg. 8.5)
13 (76.5%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
219
812 (avg. 3.7)
133 (60.7%)
9 (4.1%)
Collatz Conjecture Collatz Conjecture
117
545 (avg. 4.7)
86 (73.5%)
3 (2.6%)
Darts Darts
72
219 (avg. 3.0)
60 (83.3%)
1 (1.4%)
Gigasecond Gigasecond
143
194 (avg. 1.4)
120 (83.9%)
7 (4.9%)
ISBN Verifier ISBN Verifier
10
70 (avg. 7.0)
8 (80.0%)
0 (0.0%)
Isogram Isogram
52
186 (avg. 3.6)
46 (88.5%)
2 (3.8%)
Leap Leap
193
300 (avg. 1.6)
156 (80.8%)
16 (8.3%)
Luhn Luhn
40
318 (avg. 8.0)
30 (75.0%)
1 (2.5%)
Sieve Sieve
10
26 (avg. 2.6)
7 (70.0%)
0 (0.0%)
Matching Brackets Matching Brackets
40
100 (avg. 2.5)
28 (70.0%)
2 (5.0%)
Nth Prime Nth Prime
35
86 (avg. 2.5)
26 (74.3%)
0 (0.0%)
Pangram Pangram
52
193 (avg. 3.7)
45 (86.5%)
3 (5.8%)
Prime Factors Prime Factors
34
68 (avg. 2.0)
26 (76.5%)
1 (2.9%)
Proverb Proverb
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
Raindrops Raindrops
85
245 (avg. 2.9)
74 (87.1%)
2 (2.4%)
Resistor Color Duo Resistor Color Duo
29
72 (avg. 2.5)
23 (79.3%)
1 (3.4%)
Resistor Color Trio Resistor Color Trio
3
6 (avg. 2.0)
2 (66.7%)
0 (0.0%)
Secret Handshake Secret Handshake
7
20 (avg. 2.9)
6 (85.7%)
0 (0.0%)
Square Root Square Root
10
32 (avg. 3.2)
7 (70.0%)
0 (0.0%)
Sum of Multiples Sum of Multiples
30
179 (avg. 6.0)
24 (80.0%)
0 (0.0%)
Two-Fer Two-Fer
42
94 (avg. 2.2)
37 (88.1%)
1 (2.4%)
Bob Bob
118
536 (avg. 4.5)
101 (85.6%)
2 (1.7%)
Difference of Squares Difference of Squares
48
108 (avg. 2.3)
41 (85.4%)
3 (6.3%)
Eliud's Eggs Eliud's Eggs
11
19 (avg. 1.7)
8 (72.7%)
1 (9.1%)
ETL ETL
54
87 (avg. 1.6)
46 (85.2%)
3 (5.6%)
Hamming Hamming
58
125 (avg. 2.2)
49 (84.5%)
1 (1.7%)
Micro Blog Micro Blog
6
52 (avg. 8.7)
5 (83.3%)
0 (0.0%)
Protein Translation Protein Translation
5
38 (avg. 7.6)
4 (80.0%)
0 (0.0%)
Resistor Color Resistor Color
33
80 (avg. 2.4)
27 (81.8%)
0 (0.0%)
Reverse String Reverse String
38
161 (avg. 4.2)
33 (86.8%)
1 (2.6%)
RNA Transcription RNA Transcription
91
155 (avg. 1.7)
80 (87.9%)
4 (4.4%)
Triangle Triangle
43
75 (avg. 1.7)
36 (83.7%)
2 (4.7%)
Bottle Song Bottle Song
2
9 (avg. 4.5)
1 (50.0%)
0 (0.0%)
Crypto Square Crypto Square
31
181 (avg. 5.8)
22 (71.0%)
1 (3.2%)
Kindergarten Garden Kindergarten Garden
5
16 (avg. 3.2)
4 (80.0%)
0 (0.0%)
Nucleotide Count Nucleotide Count
48
125 (avg. 2.6)
39 (81.3%)
3 (6.3%)
Perfect Numbers Perfect Numbers
28
142 (avg. 5.1)
23 (82.1%)
1 (3.6%)
Phone Number Phone Number
4
9 (avg. 2.3)
3 (75.0%)
0 (0.0%)
Robot Name Robot Name
45
183 (avg. 4.1)
38 (84.4%)
3 (6.7%)
Roman Numerals Roman Numerals
48
105 (avg. 2.2)
38 (79.2%)
2 (4.2%)
Rotational Cipher Rotational Cipher
7
12 (avg. 1.7)
5 (71.4%)
0 (0.0%)
Series Series
41
123 (avg. 3.0)
32 (78.0%)
1 (2.4%)
Twelve Days Twelve Days
2
5 (avg. 2.5)
1 (50.0%)
0 (0.0%)
Yacht Yacht
5
64 (avg. 12.8)
4 (80.0%)
0 (0.0%)
All Your Base All Your Base
7
37 (avg. 5.3)
6 (85.7%)
0 (0.0%)
Atbash Cipher Atbash Cipher
7
29 (avg. 4.1)
5 (71.4%)
0 (0.0%)
Circular Buffer Circular Buffer
42
97 (avg. 2.3)
27 (64.3%)
1 (2.4%)
Food Chain Food Chain
2
5 (avg. 2.5)
1 (50.0%)
0 (0.0%)
House House
4
19 (avg. 4.8)
2 (50.0%)
0 (0.0%)
Grade School Grade School
6
32 (avg. 5.3)
4 (66.7%)
0 (0.0%)
Grains Grains
32
164 (avg. 5.1)
24 (75.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
5
8 (avg. 1.6)
4 (80.0%)
0 (0.0%)
Pig Latin Pig Latin
4
16 (avg. 4.0)
3 (75.0%)
0 (0.0%)
D&D Character D&D Character
6
52 (avg. 8.7)
5 (83.3%)
0 (0.0%)
Largest Series Product Largest Series Product
5
14 (avg. 2.8)
5 (100.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
22
47 (avg. 2.1)
15 (68.2%)
0 (0.0%)
Conway's Game of Life Conway's Game of Life
4
6 (avg. 1.5)
3 (75.0%)
0 (0.0%)
Knapsack Knapsack
4
11 (avg. 2.8)
3 (75.0%)
0 (0.0%)
Minesweeper Minesweeper
5
18 (avg. 3.6)
3 (60.0%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
6
5 (avg. 0.8)
3 (50.0%)
0 (0.0%)
Scrabble Score Scrabble Score
6
16 (avg. 2.7)
5 (83.3%)
0 (0.0%)
Space Age Space Age
7
12 (avg. 1.7)
5 (71.4%)
0 (0.0%)
Binary Search Binary Search
9
22 (avg. 2.4)
6 (66.7%)
0 (0.0%)
Acronym Acronym
7
45 (avg. 6.4)
6 (85.7%)
0 (0.0%)
Robot Simulator Robot Simulator
8
9 (avg. 1.1)
4 (50.0%)
1 (12.5%)
Affine Cipher Affine Cipher
3
14 (avg. 4.7)
2 (66.7%)
0 (0.0%)
State of Tic-Tac-Toe State of Tic-Tac-Toe
3
14 (avg. 4.7)
2 (66.7%)
0 (0.0%)
Book Store Book Store
4
38 (avg. 9.5)
3 (75.0%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
4
27 (avg. 6.8)
3 (75.0%)
0 (0.0%)
React React
36
57 (avg. 1.6)
11 (30.6%)
0 (0.0%)
Two Bucket Two Bucket
4
12 (avg. 3.0)
2 (50.0%)
0 (0.0%)
60 unimplemented practice exercises
Alphametics Alphametics
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Baffling Birthdays Baffling Birthdays
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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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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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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Intergalactic Transmission Intergalactic Transmission
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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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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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Relative Distance Relative Distance
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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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Split-Second Stopwatch Split-Second Stopwatch
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Strain Strain
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Sublist Sublist
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Swift Scheduling Swift Scheduling
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Tournament Tournament
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Transpose Transpose
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Tree Building Tree Building
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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: cebd372e96e52e46c583e7e011d2afaf2aa78283 (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
7,898
Test Run Pass Rate
37.8% (2986)
Test Run Fail Rate
30.5% (2407)
Test Run Error Rate
31.7% (2505)

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.