851
students have developed their Pharo skills on Exercism.

Students
851
Submissions
3,892
Mentoring Discussions
495

The Pharo track needs attention ⚠️

Building

Build

Use your knowledge to build the Pharo 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.

Usage statistics

Total Test Runner Runs
304
Test Run Pass Rate
89.1% (271)
Test Run Fail Rate
3.3% (10)
Test Run Error Rate
7.6% (23)

Build Analyzers

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Build an Analyzer for Pharo: 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

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 at least 50 practice exercises. Find out more.

Usage statistics

42 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
453
453 (avg. 1.0)
269 (59.4%)
0 (0.0%)
Two Fer Two Fer
257
352 (avg. 1.4)
202 (78.6%)
90 (35.0%)
Leap Leap
193
294 (avg. 1.5)
168 (87.0%)
68 (35.2%)
Reverse String Reverse String
174
219 (avg. 1.3)
134 (77.0%)
52 (29.9%)
Isogram Isogram
132
193 (avg. 1.5)
118 (89.4%)
39 (29.5%)
Grains Grains
120
177 (avg. 1.5)
100 (83.3%)
37 (30.8%)
Allergies Allergies
94
140 (avg. 1.5)
70 (74.5%)
30 (31.9%)
Matrix Matrix
65
104 (avg. 1.6)
56 (86.2%)
20 (30.8%)
Grade School Grade School
69
96 (avg. 1.4)
49 (71.0%)
20 (29.0%)
Forth Forth
55
71 (avg. 1.3)
28 (50.9%)
15 (27.3%)
Resistor Color Duo Resistor Color Duo
60
89 (avg. 1.5)
52 (86.7%)
7 (11.7%)
Space Age Space Age
85
127 (avg. 1.5)
66 (77.6%)
12 (14.1%)
Armstrong Numbers Armstrong Numbers
65
88 (avg. 1.4)
54 (83.1%)
7 (10.8%)
Twelve Days Twelve Days
51
64 (avg. 1.3)
34 (66.7%)
6 (11.8%)
Clock Clock
51
88 (avg. 1.7)
35 (68.6%)
9 (17.6%)
Darts Darts
41
57 (avg. 1.4)
33 (80.5%)
2 (4.9%)
Raindrops Raindrops
42
74 (avg. 1.8)
38 (90.5%)
4 (9.5%)
ISBN Verifier ISBN Verifier
38
49 (avg. 1.3)
27 (71.1%)
4 (10.5%)
Sum of Multiples Sum of Multiples
44
69 (avg. 1.6)
39 (88.6%)
4 (9.1%)
Matching Brackets Matching Brackets
41
57 (avg. 1.4)
31 (75.6%)
6 (14.6%)
Acronym Acronym
56
71 (avg. 1.3)
45 (80.4%)
4 (7.1%)
ETL ETL
37
46 (avg. 1.2)
29 (78.4%)
3 (8.1%)
Flatten Array Flatten Array
37
48 (avg. 1.3)
27 (73.0%)
4 (10.8%)
Hamming Hamming
38
55 (avg. 1.4)
31 (81.6%)
4 (10.5%)
High Scores High Scores
35
43 (avg. 1.2)
27 (77.1%)
1 (2.9%)
Diamond Diamond
32
46 (avg. 1.4)
22 (68.8%)
4 (12.5%)
Proverb Proverb
28
34 (avg. 1.2)
23 (82.1%)
2 (7.1%)
Roman Numerals Roman Numerals
34
40 (avg. 1.2)
26 (76.5%)
4 (11.8%)
Pangram Pangram
34
47 (avg. 1.4)
29 (85.3%)
3 (8.8%)
Secret Handshake Secret Handshake
28
38 (avg. 1.4)
23 (82.1%)
2 (7.1%)
Anagram Anagram
47
54 (avg. 1.1)
36 (76.6%)
3 (6.4%)
Binary Binary
41
56 (avg. 1.4)
32 (78.0%)
4 (9.8%)
Collatz Conjecture Collatz Conjecture
33
48 (avg. 1.5)
26 (78.8%)
1 (3.0%)
Atbash Cipher Atbash Cipher
37
57 (avg. 1.5)
28 (75.7%)
2 (5.4%)
Sieve Sieve
30
47 (avg. 1.6)
26 (86.7%)
3 (10.0%)
Luhn Luhn
28
40 (avg. 1.4)
23 (82.1%)
2 (7.1%)
Word Count Word Count
29
43 (avg. 1.5)
26 (89.7%)
3 (10.3%)
Minesweeper Minesweeper
27
35 (avg. 1.3)
20 (74.1%)
4 (14.8%)
Robot Simulator Robot Simulator
27
54 (avg. 2.0)
22 (81.5%)
2 (7.4%)
Bowling Bowling
28
30 (avg. 1.1)
15 (53.6%)
3 (10.7%)
Tournament Tournament
25
37 (avg. 1.5)
19 (76.0%)
2 (8.0%)
Die Die
60
62 (avg. 1.0)
31 (51.7%)
4 (6.7%)
88 unimplemented practice exercises
Affine Cipher Affine Cipher
All Your Base All Your Base
Alphametics Alphametics
Bank Account Bank Account
Binary Search Binary Search
Binary Search Tree Binary Search Tree
Bob Bob
Book Store Book Store
Bottle Song Bottle Song
Change Change
Circular Buffer Circular Buffer
Complex Numbers Complex Numbers
Connect Connect
Crypto Square Crypto Square
Custom Set Custom Set
D&D Character D&D Character
DOT DSL DOT DSL
Difference of Squares Difference of Squares
Dominoes Dominoes
Error Handling Error Handling
Food Chain Food Chain
Gigasecond Gigasecond
Go Counting Go Counting
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
Linked List Linked List
List Ops List Ops
Markdown Markdown
Meetup Meetup
Micro Blog Micro Blog
Nth Prime Nth Prime
Nucleotide Count Nucleotide Count
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
Perfect Numbers Perfect Numbers
Phone Number Phone Number
Pig Latin Pig Latin
Poker Poker
Prime Factors Prime Factors
Protein Translation Protein Translation
Pythagorean Triplet Pythagorean Triplet
Queen Attack Queen Attack
REST API REST API
RNA Transcription RNA Transcription
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Trio Resistor Color Trio
Robot Name Robot Name
Rotational Cipher Rotational Cipher
Run-Length Encoding Run-Length Encoding
SGF Parsing SGF Parsing
Saddle Points Saddle Points
Satellite Satellite
Say Say
Scale Generator Scale Generator
Scrabble Score Scrabble Score
Series Series
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
Strain Strain
Sublist Sublist
Transpose Transpose
Tree Building Tree Building
Triangle Triangle
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper