320
students have developed their Gleam skills on Exercism.

Students
320
Submissions
5,876
Mentoring Discussions
65

The Gleam track needs attention ⚠️

Building

Build

Use your knowledge to build the Gleam track itself

Build Test Runners

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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. Gleam is currently utilising a Version 1 Test Runner. Find out more.

Usage statistics

Total Test Runner Runs
5,871
Test Run Pass Rate
33.0% (1940)
Test Run Fail Rate
18.0% (1056)
Test Run Error Rate
49.0% (2875)

Build Analyzers

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

Next goal: Build an Analyzer. Find out more.

Build Representers

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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.

Create 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.

Next goal: Implement 129 practice exercises. Find out more.

Usage statistics

92 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
289
361 (avg. 1.2)
268 (92.7%)
0 (0.0%)
Resistor Color Resistor Color
194
491 (avg. 2.5)
137 (70.6%)
6 (3.1%)
Difference Of Squares Difference Of Squares
125
711 (avg. 5.7)
99 (79.2%)
9 (7.2%)
Two Fer Two Fer
108
507 (avg. 4.7)
94 (87.0%)
3 (2.8%)
Bob Bob
79
667 (avg. 8.4)
63 (79.7%)
3 (3.8%)
Leap Leap
80
264 (avg. 3.3)
72 (90.0%)
4 (5.0%)
Accumulate Accumulate
52
128 (avg. 2.5)
45 (86.5%)
3 (5.8%)
Pascals Triangle Pascals Triangle
29
124 (avg. 4.3)
21 (72.4%)
3 (10.3%)
Forth Forth
17
19 (avg. 1.1)
7 (41.2%)
2 (11.8%)
Bowling Bowling
13
70 (avg. 5.4)
5 (38.5%)
0 (0.0%)
Anagram Anagram
20
92 (avg. 4.6)
19 (95.0%)
2 (10.0%)
Pangram Pangram
25
104 (avg. 4.2)
22 (88.0%)
1 (4.0%)
Roman Numerals Roman Numerals
16
32 (avg. 2.0)
12 (75.0%)
1 (6.3%)
Protein Translation Protein Translation
27
242 (avg. 9.0)
22 (81.5%)
3 (11.1%)
Dominoes Dominoes
7
5 (avg. 0.7)
3 (42.9%)
0 (0.0%)
RNA Transcription RNA Transcription
24
97 (avg. 4.0)
22 (91.7%)
1 (4.2%)
Diamond Diamond
8
27 (avg. 3.4)
6 (75.0%)
1 (12.5%)
Series Series
11
43 (avg. 3.9)
10 (90.9%)
1 (9.1%)
Darts Darts
15
55 (avg. 3.7)
14 (93.3%)
3 (20.0%)
Resistor Color Duo Resistor Color Duo
4
12 (avg. 3.0)
4 (100.0%)
1 (25.0%)
Word Count Word Count
7
83 (avg. 11.9)
7 (100.0%)
0 (0.0%)
Custom Set Custom Set
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Circular Buffer Circular Buffer
12
87 (avg. 7.3)
9 (75.0%)
1 (8.3%)
Raindrops Raindrops
18
81 (avg. 4.5)
17 (94.4%)
2 (11.1%)
Strain Strain
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Phone Number Phone Number
8
37 (avg. 4.6)
5 (62.5%)
0 (0.0%)
Isogram Isogram
16
80 (avg. 5.0)
14 (87.5%)
0 (0.0%)
Binary Search Tree Binary Search Tree
9
19 (avg. 2.1)
7 (77.8%)
0 (0.0%)
Satellite Satellite
6
4 (avg. 0.7)
4 (66.7%)
0 (0.0%)
Tournament Tournament
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Zipper Zipper
6
7 (avg. 1.2)
5 (83.3%)
0 (0.0%)
POV POV
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Sum of Multiples Sum of Multiples
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Matching Brackets Matching Brackets
14
42 (avg. 3.0)
10 (71.4%)
1 (7.1%)
Triangle Triangle
7
23 (avg. 3.3)
7 (100.0%)
1 (14.3%)
Pythagorean Triplet Pythagorean Triplet
5
12 (avg. 2.4)
3 (60.0%)
0 (0.0%)
Alphametics Alphametics
5
1 (avg. 0.2)
1 (20.0%)
0 (0.0%)
Robot Simulator Robot Simulator
27
106 (avg. 3.9)
22 (81.5%)
3 (11.1%)
Rectangles Rectangles
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Acronym Acronym
4
8 (avg. 2.0)
3 (75.0%)
1 (25.0%)
Scrabble Score Scrabble Score
7
20 (avg. 2.9)
7 (100.0%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
11
51 (avg. 4.6)
6 (54.5%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
23
90 (avg. 3.9)
20 (87.0%)
1 (4.3%)
Reverse String Reverse String
18
66 (avg. 3.7)
15 (83.3%)
1 (5.6%)
Resistor Color Trio Resistor Color Trio
6
99 (avg. 16.5)
5 (83.3%)
2 (33.3%)
Bottle Song Bottle Song
3
14 (avg. 4.7)
2 (66.7%)
0 (0.0%)
List Ops List Ops
8
43 (avg. 5.4)
6 (75.0%)
0 (0.0%)
Perfect Numbers Perfect Numbers
5
20 (avg. 4.0)
5 (100.0%)
0 (0.0%)
Prime Factors Prime Factors
3
27 (avg. 9.0)
2 (66.7%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Grains Grains
6
47 (avg. 7.8)
5 (83.3%)
0 (0.0%)
Nucleotide count Nucleotide count
7
20 (avg. 2.9)
6 (85.7%)
1 (14.3%)
Hamming Hamming
22
261 (avg. 11.9)
19 (86.4%)
2 (9.1%)
Proverb Proverb
5
19 (avg. 3.8)
4 (80.0%)
0 (0.0%)
High Scores High Scores
8
41 (avg. 5.1)
8 (100.0%)
1 (12.5%)
Allergies Allergies
7
30 (avg. 4.3)
6 (85.7%)
1 (14.3%)
Twelve Days Twelve Days
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
ETL ETL
6
20 (avg. 3.3)
6 (100.0%)
0 (0.0%)
Queen Attack Queen Attack
3
3 (avg. 1.0)
3 (100.0%)
1 (33.3%)
Sublist Sublist
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
Rotational Cipher Rotational Cipher
4
3 (avg. 0.8)
2 (50.0%)
0 (0.0%)
Change Change
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
Flatten Array Flatten Array
4
6 (avg. 1.5)
4 (100.0%)
0 (0.0%)
All Your Base All Your Base
3
10 (avg. 3.3)
3 (100.0%)
0 (0.0%)
Knapsack Knapsack
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Yacht Yacht
15
122 (avg. 8.1)
13 (86.7%)
1 (6.7%)
D&D Character D&D Character
4
5 (avg. 1.3)
3 (75.0%)
0 (0.0%)
ISBN Verifier ISBN Verifier
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
3
5 (avg. 1.7)
3 (100.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Square Root Square Root
2
2 (avg. 1.0)
1 (50.0%)
0 (0.0%)
Space Age Space Age
7
11 (avg. 1.6)
6 (85.7%)
0 (0.0%)
Simple Cipher Simple Cipher
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Crypto Square Crypto Square
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Affine Cipher Affine Cipher
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
House House
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Connect Connect
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Clock Clock
3
13 (avg. 4.3)
3 (100.0%)
0 (0.0%)
Killer Sudoku Helper Killer Sudoku Helper
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Luhn Luhn
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Wordy Wordy
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Largest Series Product Largest Series Product
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Minesweeper Minesweeper
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Say Say
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Saddle Points Saddle Points
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Secret Handshake Secret Handshake
2
2 (avg. 1.0)
2 (100.0%)
0 (0.0%)
Matrix Matrix
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Grade School Grade School
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
OCR Numbers OCR Numbers
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Pig Latin Pig Latin
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Nth Prime Nth Prime
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
1 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Freelancer Rates Freelancer Rates
11
137 (avg. 12.5)
10 (90.9%)
0 (0.0%)
37 unimplemented practice exercises
Bank Account Bank Account
Binary Search Binary Search
Book Store Book Store
Complex Numbers Complex Numbers
DOT DSL DOT DSL
Error Handling Error Handling
Food Chain Food Chain
Gigasecond Gigasecond
Go Counting Go Counting
Grep Grep
Hangman Hangman
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
Markdown Markdown
Meetup Meetup
Micro Blog Micro Blog
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Poker Poker
REST API REST API
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Robot Name Robot Name
SGF Parsing SGF Parsing
Scale Generator Scale Generator
Sieve Sieve
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
State of Tic-Tac-Toe State of Tic-Tac-Toe
Transpose Transpose
Tree Building Tree Building
Two Bucket Two Bucket
Word Search Word Search
Zebra Puzzle Zebra Puzzle