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TypeScript

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

Students

78,737

Submissions

1,294,795

Mentoring Discussions

9,209

The TypeScript track is healthy ✅

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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.

Synced primary repo: 3d72d6ce3da11052e6a2e3b83a81a6715d622cf1 (Updates should be instant)

Next goal: Implement 136 practice exercises. Find out more.

98 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

56,093

80,655 (avg. 1.4)

45,145 (80.5%)

6 (0.0%)

Two Fer

35,239

121,735 (avg. 3.5)

26,798 (76.0%)

1,912 (5.4%)

Resistor Color

15,504

80,611 (avg. 5.2)

11,462 (73.9%)

497 (3.2%)

Resistor Color Duo

21,395

161,438 (avg. 7.5)

14,475 (67.7%)

1,385 (6.5%)

Resistor Color Trio

11,329

117,881 (avg. 10.4)

7,336 (64.8%)

459 (4.1%)

Leap

13,605

45,877 (avg. 3.4)

11,243 (82.6%)

1,447 (10.6%)

RNA Transcription

9,605

63,385 (avg. 6.6)

7,758 (80.8%)

696 (7.2%)

Space Age

7,841

52,048 (avg. 6.6)

6,169 (78.7%)

381 (4.9%)

D&D Character

5,566

43,142 (avg. 7.8)

3,612 (64.9%)

158 (2.8%)

Darts

2,675

9,539 (avg. 3.6)

2,062 (77.1%)

49 (1.8%)

Pangram

6,120

27,519 (avg. 4.5)

4,925 (80.5%)

279 (4.6%)

Bob

5,632

48,511 (avg. 8.6)

3,894 (69.1%)

272 (4.8%)

Matrix

5,150

35,774 (avg. 6.9)

3,266 (63.4%)

219 (4.3%)

Robot Name

4,608

34,116 (avg. 7.4)

2,580 (56.0%)

198 (4.3%)

Grade School

3,079

35,790 (avg. 11.6)

1,917 (62.3%)

131 (4.3%)

Clock

2,376

20,795 (avg. 8.8)

1,577 (66.4%)

82 (3.5%)

Secret Handshake

1,855

9,243 (avg. 5.0)

1,415 (76.3%)

64 (3.5%)

Binary Search

2,068

11,591 (avg. 5.6)

1,507 (72.9%)

43 (2.1%)

Linked List

1,974

15,957 (avg. 8.1)

1,218 (61.7%)

76 (3.9%)

Rational Numbers

1,036

9,363 (avg. 9.0)

689 (66.5%)

27 (2.6%)

Atbash Cipher

1,122

8,629 (avg. 7.7)

903 (80.5%)

33 (2.9%)

Simple Cipher

1,538

6,341 (avg. 4.1)

861 (56.0%)

158 (10.3%)

Wordy

1,078

12,546 (avg. 11.6)

605 (56.1%)

25 (2.3%)

List Ops

1,267

10,533 (avg. 8.3)

496 (39.1%)

37 (2.9%)

Word Count

3,109

18,103 (avg. 5.8)

2,051 (66.0%)

95 (3.1%)

Difference of Squares

2,372

6,950 (avg. 2.9)

1,883 (79.4%)

77 (3.2%)

Gigasecond

2,562

5,989 (avg. 2.3)

1,842 (71.9%)

81 (3.2%)

Reverse String

2,798

5,798 (avg. 2.1)

2,408 (86.1%)

49 (1.8%)

Triangle

1,705

9,904 (avg. 5.8)

1,282 (75.2%)

40 (2.3%)

Collatz Conjecture

1,126

3,664 (avg. 3.3)

904 (80.3%)

19 (1.7%)

ETL

1,213

5,490 (avg. 4.5)

945 (77.9%)

18 (1.5%)

Protein Translation

1,245

8,465 (avg. 6.8)

963 (77.3%)

29 (2.3%)

Raindrops

1,385

4,423 (avg. 3.2)

1,193 (86.1%)

16 (1.2%)

Hamming

1,225

3,152 (avg. 2.6)

1,045 (85.3%)

13 (1.1%)

Nucleotide Count

935

3,704 (avg. 4.0)

714 (76.4%)

14 (1.5%)

Scrabble Score

1,072

4,831 (avg. 4.5)

843 (78.6%)

23 (2.1%)

Allergies

830

4,795 (avg. 5.8)

566 (68.2%)

14 (1.7%)

Perfect Numbers

934

3,636 (avg. 3.9)

758 (81.2%)

15 (1.6%)

Complex Numbers

566

2,245 (avg. 4.0)

367 (64.8%)

3 (0.5%)

Luhn

858

4,985 (avg. 5.8)

646 (75.3%)

17 (2.0%)

Grains

627

2,917 (avg. 4.7)

472 (75.3%)

8 (1.3%)

Pythagorean Triplet

587

2,382 (avg. 4.1)

323 (55.0%)

5 (0.9%)

Sum of Multiples

629

2,838 (avg. 4.5)

461 (73.3%)

8 (1.3%)

Acronym

1,099

8,457 (avg. 7.7)

813 (74.0%)

13 (1.2%)

Anagram

1,051

5,846 (avg. 5.6)

823 (78.3%)

12 (1.1%)

Isogram

1,083

4,487 (avg. 4.1)

873 (80.6%)

8 (0.7%)

Roman Numerals

886

3,477 (avg. 3.9)

644 (72.7%)

9 (1.0%)

Series

827

4,676 (avg. 5.7)

622 (75.2%)

11 (1.3%)

Phone Number

744

5,384 (avg. 7.2)

518 (69.6%)

3 (0.4%)

Two Bucket

434

1,735 (avg. 4.0)

188 (43.3%)

2 (0.5%)

Variable Length Quantity

322

1,375 (avg. 4.3)

168 (52.2%)

1 (0.3%)

Largest Series Product

426

1,913 (avg. 4.5)

301 (70.7%)

13 (3.1%)

Food Chain

367

1,730 (avg. 4.7)

226 (61.6%)

0 (0.0%)

House

349

1,534 (avg. 4.4)

199 (57.0%)

3 (0.9%)

ISBN Verifier

468

1,934 (avg. 4.1)

331 (70.7%)

8 (1.7%)

Pig Latin

377

1,759 (avg. 4.7)

228 (60.5%)

6 (1.6%)

Proverb

327

843 (avg. 2.6)

240 (73.4%)

1 (0.3%)

Twelve Days

377

1,518 (avg. 4.0)

242 (64.2%)

3 (0.8%)

Beer Song

479

4,966 (avg. 10.4)

280 (58.5%)

1 (0.2%)

Say

328

1,782 (avg. 5.4)

195 (59.5%)

0 (0.0%)

Rectangles

259

841 (avg. 3.2)

122 (47.1%)

0 (0.0%)

Saddle Points

304

971 (avg. 3.2)

185 (60.9%)

5 (1.6%)

Spiral Matrix

297

1,021 (avg. 3.4)

176 (59.3%)

3 (1.0%)

Transpose

348

2,572 (avg. 7.4)

194 (55.7%)

1 (0.3%)

OCR Numbers

242

1,360 (avg. 5.6)

134 (55.4%)

3 (1.2%)

Nth Prime

395

1,309 (avg. 3.3)

278 (70.4%)

2 (0.5%)

Alphametics

247

1,121 (avg. 4.5)

84 (34.0%)

1 (0.4%)

Connect

196

681 (avg. 3.5)

87 (44.4%)

2 (1.0%)

Bowling

520

4,757 (avg. 9.1)

173 (33.3%)

8 (1.5%)

Prime Factors

374

920 (avg. 2.5)

273 (73.0%)

12 (3.2%)

Diamond

270

1,179 (avg. 4.4)

154 (57.0%)

0 (0.0%)

Pascal's Triangle

304

963 (avg. 3.2)

192 (63.2%)

5 (1.6%)

Binary Search Tree

399

1,856 (avg. 4.7)

240 (60.2%)

4 (1.0%)

Sublist

306

1,723 (avg. 5.6)

179 (58.5%)

2 (0.7%)

Custom Set

313

1,781 (avg. 5.7)

173 (55.3%)

0 (0.0%)

Circular Buffer

526

2,209 (avg. 4.2)

314 (59.7%)

7 (1.3%)

Word Search

464

2,170 (avg. 4.7)

160 (34.5%)

7 (1.5%)

Sieve

260

664 (avg. 2.6)

179 (68.8%)

2 (0.8%)

Palindrome Products

266

1,938 (avg. 7.3)

117 (44.0%)

4 (1.5%)

Diffie-Hellman

698

2,315 (avg. 3.3)

473 (67.8%)

6 (0.9%)

Robot Simulator

581

3,701 (avg. 6.4)

365 (62.8%)

6 (1.0%)

Armstrong Numbers

1,384

5,695 (avg. 4.1)

1,031 (74.5%)

27 (2.0%)

Run-Length Encoding

1,141

5,270 (avg. 4.6)

744 (65.2%)

22 (1.9%)

Bank Account

296

1,670 (avg. 5.6)

206 (69.6%)

1 (0.3%)

Eliud's Eggs

228

592 (avg. 2.6)

184 (80.7%)

3 (1.3%)

Rotational Cipher

438

796 (avg. 1.8)

285 (65.1%)

9 (2.1%)

Strain

619

1,405 (avg. 2.3)

424 (68.5%)

16 (2.6%)

All Your Base

435

1,625 (avg. 3.7)

240 (55.2%)

5 (1.1%)

Flatten Array

741

3,204 (avg. 4.3)

474 (64.0%)

14 (1.9%)

Matching Brackets

617

2,614 (avg. 4.2)

377 (61.1%)

16 (2.6%)

Tournament

243

2,154 (avg. 8.9)

130 (53.5%)

2 (0.8%)

Minesweeper

490

2,111 (avg. 4.3)

261 (53.3%)

8 (1.6%)

Kindergarten Garden

287

1,197 (avg. 4.2)

171 (59.6%)

1 (0.3%)

Queen Attack

692

3,028 (avg. 4.4)

390 (56.4%)

23 (3.3%)

React

877

1,611 (avg. 1.8)

79 (9.0%)

1 (0.1%)

Crypto Square

410

1,508 (avg. 3.7)

217 (52.9%)

7 (1.7%)

Knapsack

491

2,647 (avg. 5.4)

171 (34.8%)

5 (1.0%)

Conway's Game of Life

7 (avg. 1.4)

3 (60.0%)

0 (0.0%)

1 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Accumulate

386

884 (avg. 2.3)

266 (68.9%)

11 (2.8%)

38 unimplemented practice exercises

Affine Cipher

Baffling Birthdays

Book Store

Bottle Song

Change

Dominoes

DOT DSL

Error Handling

Forth

Go Counting

Grep

Hangman

High Scores

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Markdown

Meetup

Micro Blog

PaaS I/O

Parallel Letter Frequency

Poker

POV

Rail Fence Cipher

Relative Distance

REST API

Satellite

SGF Parsing

Simple Linked List

Split-Second Stopwatch

Square Root

State of Tic-Tac-Toe

Swift Scheduling

Tree Building

Yacht

Zebra Puzzle

Zipper

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

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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: 078ce57d389542e5c9f84ce27fa06904d38a5af2 (Takes up to 10 mins to deploy)

Total Test Runner Runs

1,263,353

Test Run Pass Rate

19.3% (243879)

Test Run Fail Rate

41.0% (518254)

Test Run Error Rate

39.7% (501220)

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.

Current version: 970e41d244fe29d25e5836d1d504bae5d87ebf28 (Takes up to 10 mins to deploy)

Total Representer Runs

232,288

Total Representation Comments Made

53,347

Feedback Given Frequency

23.0%

Analyzer

Learn More

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

Current version: 8cda5a222e955b9ac0c1fc2150364a3ed0252515 (Takes up to 10 mins to deploy)

Total Analyzer Runs

231,625

Total Analysis Comments Made

11,355

Feedback Given Frequency

0.8%

Volunteers

515

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6,699

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6,162

SleeplessByte

5,679

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