2,611
students have developed their Groovy skills on Exercism.

Students
2,611
Submissions
23,033
Mentoring Discussions
609

The Groovy track needs attention ⚠️

Building

Build

Use your knowledge to build the Groovy track itself

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

Usage statistics

Total Test Runner Runs
20,309
Test Run Pass Rate
25.7% (5214)
Test Run Fail Rate
62.0% (12589)
Test Run Error Rate
12.3% (2506)

Build Analyzers

Learn More

Build an Analyzer for Groovy: 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 129 practice exercises. Find out more.

Usage statistics

55 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
1,389
3,755 (avg. 2.7)
967 (69.6%)
1 (0.1%)
Two Fer Two Fer
743
3,517 (avg. 4.7)
465 (62.6%)
152 (20.5%)
Hamming Hamming
455
2,333 (avg. 5.1)
318 (69.9%)
76 (16.7%)
Gigasecond Gigasecond
225
1,009 (avg. 4.5)
160 (71.1%)
48 (21.3%)
Scrabble Score Scrabble Score
208
985 (avg. 4.7)
160 (76.9%)
37 (17.8%)
Difference of Squares Difference of Squares
184
721 (avg. 3.9)
150 (81.5%)
30 (16.3%)
Secret Handshake Secret Handshake
118
415 (avg. 3.5)
95 (80.5%)
27 (22.9%)
Matrix Matrix
96
254 (avg. 2.6)
74 (77.1%)
27 (28.1%)
Triangle Triangle
96
376 (avg. 3.9)
77 (80.2%)
24 (25.0%)
Rotational Cipher Rotational Cipher
83
278 (avg. 3.3)
71 (85.5%)
23 (27.7%)
Saddle Points Saddle Points
65
207 (avg. 3.2)
53 (81.5%)
20 (30.8%)
Flatten Array Flatten Array
81
212 (avg. 2.6)
69 (85.2%)
18 (22.2%)
Word Count Word Count
109
477 (avg. 4.4)
83 (76.1%)
15 (13.8%)
Robot Name Robot Name
104
266 (avg. 2.6)
76 (73.1%)
14 (13.5%)
Binary Search Binary Search
60
151 (avg. 2.5)
54 (90.0%)
12 (20.0%)
Bank Account Bank Account
69
489 (avg. 7.1)
54 (78.3%)
14 (20.3%)
Linked List Linked List
68
117 (avg. 1.7)
53 (77.9%)
14 (20.6%)
Raindrops Raindrops
301
572 (avg. 1.9)
226 (75.1%)
15 (5.0%)
Isogram Isogram
165
337 (avg. 2.0)
129 (78.2%)
9 (5.5%)
Anagram Anagram
130
286 (avg. 2.2)
99 (76.2%)
6 (4.6%)
Reverse String Reverse String
155
206 (avg. 1.3)
136 (87.7%)
3 (1.9%)
Darts Darts
118
220 (avg. 1.9)
93 (78.8%)
1 (0.8%)
Resistor Color Resistor Color
127
366 (avg. 2.9)
101 (79.5%)
2 (1.6%)
Protein Translation Protein Translation
90
196 (avg. 2.2)
74 (82.2%)
0 (0.0%)
Proverb Proverb
73
136 (avg. 1.9)
64 (87.7%)
1 (1.4%)
Bob Bob
76
335 (avg. 4.4)
57 (75.0%)
2 (2.6%)
Accumulate Accumulate
74
274 (avg. 3.7)
63 (85.1%)
1 (1.4%)
Resistor Color Duo Resistor Color Duo
83
240 (avg. 2.9)
70 (84.3%)
0 (0.0%)
Strain Strain
67
153 (avg. 2.3)
58 (86.6%)
0 (0.0%)
ISBN Verifier ISBN Verifier
60
174 (avg. 2.9)
44 (73.3%)
1 (1.7%)
Luhn Luhn
58
152 (avg. 2.6)
45 (77.6%)
1 (1.7%)
Roman Numerals Roman Numerals
61
159 (avg. 2.6)
49 (80.3%)
1 (1.6%)
Nucleotide Count Nucleotide Count
50
96 (avg. 1.9)
46 (92.0%)
0 (0.0%)
Phone Number Phone Number
72
159 (avg. 2.2)
52 (72.2%)
1 (1.4%)
Series Series
51
168 (avg. 3.3)
44 (86.3%)
0 (0.0%)
Leap Leap
100
184 (avg. 1.8)
86 (86.0%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
72
150 (avg. 2.1)
49 (68.1%)
0 (0.0%)
Allergies Allergies
51
136 (avg. 2.7)
41 (80.4%)
0 (0.0%)
Perfect Numbers Perfect Numbers
51
143 (avg. 2.8)
41 (80.4%)
0 (0.0%)
Sum of Multiples Sum of Multiples
48
168 (avg. 3.5)
40 (83.3%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
44
127 (avg. 2.9)
37 (84.1%)
0 (0.0%)
Nth Prime Nth Prime
56
180 (avg. 3.2)
45 (80.4%)
1 (1.8%)
Prime Factors Prime Factors
40
102 (avg. 2.6)
32 (80.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
36
78 (avg. 2.2)
32 (88.9%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
39
98 (avg. 2.5)
34 (87.2%)
0 (0.0%)
All Your Base All Your Base
38
133 (avg. 3.5)
32 (84.2%)
0 (0.0%)
Matching Brackets Matching Brackets
54
183 (avg. 3.4)
36 (66.7%)
0 (0.0%)
ETL ETL
45
78 (avg. 1.7)
37 (82.2%)
1 (2.2%)
High Scores High Scores
70
235 (avg. 3.4)
55 (78.6%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
83
259 (avg. 3.1)
67 (80.7%)
4 (4.8%)
RNA Transcription RNA Transcription
99
158 (avg. 1.6)
85 (85.9%)
4 (4.0%)
Acronym Acronym
72
213 (avg. 3.0)
60 (83.3%)
2 (2.8%)
Pangram Pangram
78
246 (avg. 3.2)
65 (83.3%)
3 (3.8%)
Space Age Space Age
71
238 (avg. 3.4)
59 (83.1%)
0 (0.0%)
Grains Grains
64
133 (avg. 2.1)
53 (82.8%)
1 (1.6%)
74 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Clock Clock
Complex Numbers Complex Numbers
Connect Connect
Crypto Square Crypto Square
Custom Set Custom Set
D&D Character D&D Character
DOT DSL DOT DSL
Diamond Diamond
Dominoes Dominoes
Error Handling Error Handling
Food Chain Food Chain
Forth Forth
Go Counting Go Counting
Grade School Grade School
Grep Grep
Hangman Hangman
House House
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Largest Series Product Largest Series Product
Ledger Ledger
Lens Person Lens Person
List Ops List Ops
Markdown Markdown
Meetup Meetup
Micro Blog Micro Blog
Minesweeper Minesweeper
OCR Numbers OCR Numbers
POV POV
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pascal's Triangle Pascal's Triangle
Pig Latin Pig Latin
Poker Poker
Pythagorean Triplet Pythagorean Triplet
Queen Attack Queen Attack
REST API REST API
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Robot Simulator Robot Simulator
SGF Parsing SGF Parsing
Satellite Satellite
Say Say
Scale Generator Scale Generator
Sieve Sieve
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
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 Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper