Ballerina impact and status on Exercism

Ballerina

1,383 students

About Ballerina

Practice

32 contributors

62 mentors

Ballerina Track Management

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

Students

1,383

Submissions

7,979

Mentoring Discussions

The Ballerina track needs attention ⚠️

Building

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.

Synced primary repo: feff0d750c91ac12c9b564c827a0a9fab577f151 (Updates should be instant)

Next goal: Implement 146 practice exercises. Find out more.

58 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

858

1,329 (avg. 1.5)

563 (65.6%)

0 (0.0%)

Calculator Service

309

1,333 (avg. 4.3)

163 (52.8%)

9 (2.9%)

Echo Service

186

412 (avg. 2.2)

151 (81.2%)

4 (2.2%)

Service Error Handling

135

789 (avg. 5.8)

110 (81.5%)

1 (0.7%)

Greeting Service

176

553 (avg. 3.1)

153 (86.9%)

7 (4.0%)

Hello World Service

207

336 (avg. 1.6)

165 (79.7%)

15 (7.2%)

Service Composition

242 (avg. 2.8)

62 (71.3%)

0 (0.0%)

Service Invocation

15 (avg. 1.3)

7 (58.3%)

5 (41.7%)

CSV Fuel Allowance

101 (avg. 1.7)

48 (81.4%)

0 (0.0%)

JSON Fuel Allowance

106 (avg. 1.7)

48 (77.4%)

1 (1.6%)

XML Fuel Allowance

131 (avg. 3.4)

13 (33.3%)

0 (0.0%)

Monitor Rush

70 (avg. 1.6)

41 (93.2%)

0 (0.0%)

The Cake is a Lie

43 (avg. 3.1)

6 (42.9%)

0 (0.0%)

PaySwitch - Salary Converter

35 (avg. 3.2)

7 (63.6%)

0 (0.0%)

Armstrong Numbers

0 (avg. 0.0)

0 (0.0%)

Isogram

166 (avg. 3.1)

47 (87.0%)

0 (0.0%)

Raindrops

131 (avg. 2.7)

44 (89.8%)

2 (4.1%)

Roman Numerals

193 (avg. 3.9)

42 (85.7%)

1 (2.0%)

Space Age

162 (avg. 3.9)

40 (95.2%)

0 (0.0%)

Acronym

225 (avg. 3.8)

50 (84.7%)

1 (1.7%)

Sieve

19 (avg. 1.6)

9 (75.0%)

0 (0.0%)

Bob

45 (avg. 3.2)

12 (85.7%)

0 (0.0%)

Collatz Conjecture

157 (avg. 9.8)

12 (75.0%)

0 (0.0%)

Grains

37 (avg. 2.6)

12 (85.7%)

0 (0.0%)

Knapsack

17 (avg. 2.1)

5 (62.5%)

0 (0.0%)

Hamming

17 (avg. 1.3)

9 (69.2%)

0 (0.0%)

Difference Of Squares

25 (avg. 1.5)

15 (88.2%)

0 (0.0%)

Leap

79 (avg. 2.2)

35 (97.2%)

0 (0.0%)

Darts

19 (avg. 1.5)

11 (84.6%)

0 (0.0%)

Two Fer

45 (avg. 2.4)

14 (73.7%)

0 (0.0%)

Pangram

53 (avg. 3.3)

14 (87.5%)

0 (0.0%)

Anagram

21 (avg. 1.9)

9 (81.8%)

1 (9.1%)

Atbash Cipher

0 (avg. 0.0)

0 (0.0%)

Protein Translation

54 (avg. 3.9)

11 (78.6%)

1 (7.1%)

ETL

18 (avg. 1.6)

9 (81.8%)

1 (9.1%)

Pascal's Triangle

2 (avg. 0.5)

2 (50.0%)

0 (0.0%)

Two Bucket

16 (avg. 2.3)

5 (71.4%)

1 (14.3%)

Binary Search

332 (avg. 4.7)

67 (95.7%)

0 (0.0%)

Linked List

10 (avg. 1.0)

6 (60.0%)

0 (0.0%)

Largest Series Product

19 (avg. 2.1)

8 (88.9%)

0 (0.0%)

Matching Brackets

6 (avg. 1.2)

4 (80.0%)

0 (0.0%)

Robot Simulator

9 (avg. 1.3)

6 (85.7%)

0 (0.0%)

Saddle Points

19 (avg. 2.1)

7 (77.8%)

1 (11.1%)

Sum Of Multiples

41 (avg. 3.4)

10 (83.3%)

0 (0.0%)

Secret Handshake

13 (avg. 1.4)

7 (77.8%)

0 (0.0%)

Kindergarten Garden

9 (avg. 2.3)

2 (50.0%)

0 (0.0%)

Yacht

69 (avg. 7.7)

8 (88.9%)

0 (0.0%)

Reverse String

68 (avg. 5.2)

9 (69.2%)

0 (0.0%)

Allergies

37 (avg. 9.3)

3 (75.0%)

0 (0.0%)

RNA Transcription

15 (avg. 2.5)

6 (100.0%)

0 (0.0%)

Triangle

18 (avg. 4.5)

2 (50.0%)

0 (0.0%)

Scrabble Score

7 (avg. 1.4)

4 (80.0%)

0 (0.0%)

Resistor Color

4 (avg. 2.0)

1 (50.0%)

0 (0.0%)

Eliud's Eggs

8 (avg. 1.6)

5 (100.0%)

0 (0.0%)

Circular Buffer

5 (avg. 1.0)

2 (40.0%)

0 (0.0%)

List Ops

17 (avg. 4.3)

1 (25.0%)

0 (0.0%)

D&D Character

15 (avg. 2.5)

4 (66.7%)

0 (0.0%)

Rotational Cipher

15 (avg. 3.0)

2 (40.0%)

0 (0.0%)

2 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Legacy Service Client

6 (avg. 1.2)

4 (80.0%)

2 (40.0%)

Order Management

1 (avg. 1.0)

1 (100.0%)

0 (0.0%)

88 unimplemented practice exercises

Affine Cipher

All Your Base

Alphametics

Baffling Birthdays

Bank Account

Binary Search Tree

Book Store

Bottle Song

Bowling

Change

Clock

Complex Numbers

Connect

Conway's Game of Life

Crypto Square

Custom Set

Diamond

Dominoes

DOT DSL

Flatten Array

Food Chain

Forth

Gigasecond

Go Counting

Grade School

Grep

Hangman

High Scores

House

Intergalactic Transmission

ISBN Verifier

Killer Sudoku Helper

Ledger

Lens Person

Luhn

Markdown

Matrix

Meetup

Micro Blog

Minesweeper

Nth Prime

Nucleotide Count

OCR Numbers

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Perfect Numbers

Phone Number

Pig Latin

Poker

POV

Prime Factors

Proverb

Pythagorean Triplet

Queen Attack

Rail Fence Cipher

Rational Numbers

React

Rectangles

Relative Distance

Resistor Color Duo

Resistor Color Trio

REST API

Robot Name

Run-Length Encoding

Satellite

Say

Series

SGF Parsing

Simple Cipher

Simple Linked List

Spiral Matrix

Split-Second Stopwatch

Square Root

State of Tic-Tac-Toe

Strain

Sublist

Swift Scheduling

Tournament

Transpose

Tree Building

Twelve Days

Variable Length Quantity

Word Count

Word Search

Wordy

Zebra Puzzle

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

Learn More

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: c454c543c25afe459fc26683c752d9b2304db42d (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. Ballerina is currently utilising a Version 1 Test Runner. Find out more.

Total Test Runner Runs

7,829

Test Run Pass Rate

32.2% (2521)

Test Run Fail Rate

51.8% (4057)

Test Run Error Rate

16.0% (1251)

Representer

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.

Analyzer

Learn More

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

Next goal: Build an Analyzer. Find out more.

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925

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763

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