2,328
students have developed their Groovy skills on Exercism.

Students
2,328
Submissions
17,220
Mentoring Discussions
603

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
14,642
Test Run Pass Rate
28.0% (4100)
Test Run Fail Rate
61.6% (9017)
Test Run Error Rate
10.4% (1525)

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
1,156
2,757 (avg. 2.4)
826 (71.5%)
1 (0.1%)
Two Fer Two Fer
632
2,774 (avg. 4.4)
406 (64.2%)
146 (23.1%)
Hamming Hamming
391
1,892 (avg. 4.8)
285 (72.9%)
76 (19.4%)
Gigasecond Gigasecond
193
816 (avg. 4.2)
144 (74.6%)
48 (24.9%)
Scrabble Score Scrabble Score
179
750 (avg. 4.2)
140 (78.2%)
36 (20.1%)
Difference of Squares Difference of Squares
158
524 (avg. 3.3)
130 (82.3%)
30 (19.0%)
Secret Handshake Secret Handshake
104
310 (avg. 3.0)
83 (79.8%)
27 (26.0%)
Matrix Matrix
81
201 (avg. 2.5)
64 (79.0%)
27 (33.3%)
Triangle Triangle
81
249 (avg. 3.1)
64 (79.0%)
24 (29.6%)
Rotational Cipher Rotational Cipher
73
216 (avg. 3.0)
63 (86.3%)
23 (31.5%)
Saddle Points Saddle Points
57
150 (avg. 2.6)
46 (80.7%)
20 (35.1%)
Flatten Array Flatten Array
70
157 (avg. 2.2)
60 (85.7%)
18 (25.7%)
Word Count Word Count
96
384 (avg. 4.0)
73 (76.0%)
15 (15.6%)
Robot Name Robot Name
90
195 (avg. 2.2)
65 (72.2%)
14 (15.6%)
Binary Search Binary Search
48
93 (avg. 1.9)
45 (93.8%)
12 (25.0%)
Bank Account Bank Account
59
425 (avg. 7.2)
47 (79.7%)
14 (23.7%)
Linked List Linked List
55
84 (avg. 1.5)
46 (83.6%)
14 (25.5%)
Raindrops Raindrops
287
483 (avg. 1.7)
215 (74.9%)
15 (5.2%)
Isogram Isogram
157
272 (avg. 1.7)
122 (77.7%)
9 (5.7%)
Anagram Anagram
122
236 (avg. 1.9)
92 (75.4%)
6 (4.9%)
Reverse String Reverse String
139
172 (avg. 1.2)
123 (88.5%)
3 (2.2%)
Darts Darts
105
161 (avg. 1.5)
81 (77.1%)
1 (1.0%)
Resistor Color Resistor Color
116
230 (avg. 2.0)
92 (79.3%)
2 (1.7%)
Protein Translation Protein Translation
81
148 (avg. 1.8)
66 (81.5%)
0 (0.0%)
Proverb Proverb
64
97 (avg. 1.5)
56 (87.5%)
1 (1.6%)
Bob Bob
66
244 (avg. 3.7)
50 (75.8%)
2 (3.0%)
Accumulate Accumulate
65
248 (avg. 3.8)
55 (84.6%)
1 (1.5%)
Resistor Color Duo Resistor Color Duo
73
175 (avg. 2.4)
61 (83.6%)
0 (0.0%)
Strain Strain
57
94 (avg. 1.6)
49 (86.0%)
0 (0.0%)
ISBN Verifier ISBN Verifier
50
117 (avg. 2.3)
36 (72.0%)
1 (2.0%)
Luhn Luhn
51
119 (avg. 2.3)
39 (76.5%)
1 (2.0%)
Roman Numerals Roman Numerals
53
129 (avg. 2.4)
43 (81.1%)
1 (1.9%)
Nucleotide Count Nucleotide Count
43
66 (avg. 1.5)
40 (93.0%)
0 (0.0%)
Phone Number Phone Number
65
119 (avg. 1.8)
46 (70.8%)
1 (1.5%)
Series Series
43
124 (avg. 2.9)
37 (86.0%)
0 (0.0%)
Leap Leap
91
159 (avg. 1.7)
78 (85.7%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
63
114 (avg. 1.8)
42 (66.7%)
0 (0.0%)
Allergies Allergies
43
57 (avg. 1.3)
34 (79.1%)
0 (0.0%)
Perfect Numbers Perfect Numbers
43
93 (avg. 2.2)
36 (83.7%)
0 (0.0%)
Sum of Multiples Sum of Multiples
41
70 (avg. 1.7)
34 (82.9%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
36
63 (avg. 1.8)
30 (83.3%)
0 (0.0%)
Nth Prime Nth Prime
46
76 (avg. 1.7)
38 (82.6%)
1 (2.2%)
Prime Factors Prime Factors
32
64 (avg. 2.0)
25 (78.1%)
0 (0.0%)
Atbash Cipher Atbash Cipher
28
37 (avg. 1.3)
25 (89.3%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
32
54 (avg. 1.7)
28 (87.5%)
0 (0.0%)
All Your Base All Your Base
30
63 (avg. 2.1)
25 (83.3%)
0 (0.0%)
Matching Brackets Matching Brackets
44
63 (avg. 1.4)
29 (65.9%)
0 (0.0%)
ETL ETL
37
40 (avg. 1.1)
30 (81.1%)
1 (2.7%)
High Scores High Scores
61
189 (avg. 3.1)
48 (78.7%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
71
186 (avg. 2.6)
59 (83.1%)
4 (5.6%)
RNA Transcription RNA Transcription
90
126 (avg. 1.4)
77 (85.6%)
4 (4.4%)
Acronym Acronym
60
152 (avg. 2.5)
50 (83.3%)
1 (1.7%)
Pangram Pangram
65
175 (avg. 2.7)
56 (86.2%)
2 (3.1%)
Space Age Space Age
61
144 (avg. 2.4)
51 (83.6%)
0 (0.0%)
Grains Grains
56
84 (avg. 1.5)
46 (82.1%)
1 (1.8%)
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