D Track Management

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

Students
833
Submissions
6,216
Mentoring Discussions
73

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Building

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: afc01db6d65a5f9aa9b0d689a858895fd7938ccd (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
64 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
575
687 (avg. 1.2)
457 (79.5%)
0 (0.0%)
Allergies Allergies
24
139 (avg. 5.8)
8 (33.3%)
1 (4.2%)
Anagram Anagram
3
49 (avg. 16.3)
3 (100.0%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
167
584 (avg. 3.5)
85 (50.9%)
8 (4.8%)
Collatz Conjecture Collatz Conjecture
102
452 (avg. 4.4)
77 (75.5%)
3 (2.9%)
Darts Darts
65
206 (avg. 3.2)
55 (84.6%)
1 (1.5%)
Gigasecond Gigasecond
138
190 (avg. 1.4)
117 (84.8%)
7 (5.1%)
Isbn Verifier Isbn Verifier
3
12 (avg. 4.0)
3 (100.0%)
0 (0.0%)
Isogram Isogram
47
150 (avg. 3.2)
41 (87.2%)
2 (4.3%)
Leap Leap
183
280 (avg. 1.5)
147 (80.3%)
16 (8.7%)
Luhn Luhn
33
247 (avg. 7.5)
25 (75.8%)
1 (3.0%)
Sieve Sieve
4
5 (avg. 1.3)
2 (50.0%)
0 (0.0%)
Matching Brackets Matching Brackets
35
95 (avg. 2.7)
25 (71.4%)
2 (5.7%)
Nth Prime Nth Prime
29
79 (avg. 2.7)
22 (75.9%)
0 (0.0%)
Pangram Pangram
47
162 (avg. 3.4)
41 (87.2%)
3 (6.4%)
Prime Factors Prime Factors
29
61 (avg. 2.1)
22 (75.9%)
1 (3.4%)
Raindrops Raindrops
79
200 (avg. 2.5)
69 (87.3%)
2 (2.5%)
Resistor Color Duo Resistor Color Duo
23
65 (avg. 2.8)
19 (82.6%)
1 (4.3%)
Secret Handshake Secret Handshake
3
8 (avg. 2.7)
2 (66.7%)
0 (0.0%)
Square Root Square Root
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Sum of Multiples Sum of Multiples
26
172 (avg. 6.6)
21 (80.8%)
0 (0.0%)
Two Fer Two Fer
36
83 (avg. 2.3)
32 (88.9%)
1 (2.8%)
Bob Bob
67
197 (avg. 2.9)
53 (79.1%)
2 (3.0%)
Difference of Squares Difference of Squares
45
100 (avg. 2.2)
38 (84.4%)
3 (6.7%)
Eliud's Eggs Eliud's Eggs
6
7 (avg. 1.2)
4 (66.7%)
1 (16.7%)
ETL ETL
51
70 (avg. 1.4)
43 (84.3%)
3 (5.9%)
Hamming Hamming
54
93 (avg. 1.7)
44 (81.5%)
1 (1.9%)
Micro Blog Micro Blog
2
4 (avg. 2.0)
1 (50.0%)
0 (0.0%)
Protein Translation Protein Translation
3
16 (avg. 5.3)
2 (66.7%)
0 (0.0%)
Resistor Color Resistor Color
30
71 (avg. 2.4)
23 (76.7%)
0 (0.0%)
Reverse String Reverse String
35
148 (avg. 4.2)
30 (85.7%)
1 (2.9%)
RNA Transcription RNA Transcription
88
150 (avg. 1.7)
78 (88.6%)
4 (4.5%)
Triangle Triangle
38
67 (avg. 1.8)
32 (84.2%)
2 (5.3%)
Crypto Square Crypto Square
30
68 (avg. 2.3)
19 (63.3%)
1 (3.3%)
Kindergarten Garden Kindergarten Garden
3
13 (avg. 4.3)
2 (66.7%)
0 (0.0%)
Nucleotide Count Nucleotide Count
46
101 (avg. 2.2)
36 (78.3%)
3 (6.5%)
Perfect Numbers Perfect Numbers
26
138 (avg. 5.3)
21 (80.8%)
1 (3.8%)
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
46
98 (avg. 2.1)
35 (76.1%)
2 (4.3%)
Rotational Cipher Rotational Cipher
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
Series Series
40
105 (avg. 2.6)
30 (75.0%)
1 (2.5%)
Yacht Yacht
3
60 (avg. 20.0)
2 (66.7%)
0 (0.0%)
All Your Base All Your Base
3
16 (avg. 5.3)
3 (100.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
3
25 (avg. 8.3)
2 (66.7%)
0 (0.0%)
Circular Buffer Circular Buffer
36
81 (avg. 2.3)
22 (61.1%)
1 (2.8%)
Grains Grains
29
146 (avg. 5.0)
21 (72.4%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Pig Latin Pig Latin
3
15 (avg. 5.0)
2 (66.7%)
0 (0.0%)
D&D Character D&D Character
4
50 (avg. 12.5)
3 (75.0%)
0 (0.0%)
Largest Series Product Largest Series Product
3
9 (avg. 3.0)
3 (100.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
19
44 (avg. 2.3)
13 (68.4%)
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
3
16 (avg. 5.3)
2 (66.7%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Scrabble Score Scrabble Score
3
11 (avg. 3.7)
2 (66.7%)
0 (0.0%)
Space Age Space Age
3
7 (avg. 2.3)
2 (66.7%)
0 (0.0%)
Binary Search Binary Search
6
17 (avg. 2.8)
3 (50.0%)
0 (0.0%)
Acronym Acronym
4
42 (avg. 10.5)
3 (75.0%)
0 (0.0%)
Robot Simulator Robot Simulator
5
6 (avg. 1.2)
2 (40.0%)
1 (20.0%)
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
50 (avg. 1.4)
10 (28.6%)
0 (0.0%)
65 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Bank Account Bank Account
Binary Search Tree Binary Search Tree
Bottle Song Bottle Song
Bowling Bowling
Change Change
Clock Clock
Complex Numbers Complex Numbers
Connect Connect
Custom Set Custom Set
Diamond Diamond
Dominoes Dominoes
DOT DSL DOT DSL
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Go Counting Go Counting
Grade School Grade School
Grep Grep
Hangman Hangman
High Scores High Scores
House House
Killer Sudoku Helper Killer Sudoku Helper
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
List Ops List Ops
Markdown Markdown
Matrix Matrix
Meetup Meetup
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Poker Poker
POV POV
Proverb Proverb
Queen Attack Queen Attack
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
Rectangles Rectangles
Resistor Color Trio Resistor Color Trio
REST API REST API
Saddle Points Saddle Points
Satellite Satellite
Say Say
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Sublist Sublist
Tournament Tournament
Transpose Transpose
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Count Word Count
Word Search Word Search
Wordy Wordy
Zipper Zipper

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: 6399d21fde6b8b787dfc6cd90a93f757bf75b0c6 (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
5,771
Test Run Pass Rate
39.7% (2292)
Test Run Fail Rate
31.2% (1801)
Test Run Error Rate
29.1% (1678)

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.