JavaScript Track Management

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

Students
347,286
Submissions
8,157,444
Mentoring Discussions
41,172

The JavaScript track is healthy ✅

Building

JavaScript syllabus

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Help create the track syllabus: is a set of concepts and learning exercises put together to teach foundational elements of the programming language.

Next goal: Create a complete syllabus with at least 40 concepts. Find out more.
33 concepts being taught
Ba
Basics
60,745 learnt
Bo
Booleans
34,511 learnt
Ar
Arithmetic Operators
33,849 learnt
Nu
Numbers
33,849 learnt
St
Strings
29,817 learnt
Ar
Arrays
24,523 learnt
Co
Comparison
22,934 learnt
Co
Conditionals
22,934 learnt
Fo
For Loops
20,141 learnt
In
Increment/Decrement
20,141 learnt
Sw
Switch Statement
16,511 learnt
Wh
While Loops
16,511 learnt
Ty
Type Conversion
12,456 learnt
Ar
Array Analysis
8,754 learnt
Ar
Arrow Functions
8,754 learnt
Ar
Array Destructuring
9,788 learnt
Re
Rest and Spread
9,788 learnt
Ar
Array Loops
7,289 learnt
Nu
Null and Undefined
13,970 learnt
Re
Recursion
2,093 learnt
Cl
Closures
8,988 learnt
Ca
Callbacks
9,350 learnt
Pr
Promises
3,639 learnt
Ob
Objects
15,259 learnt
Se
Sets
5,469 learnt
Fu
Functions
11,867 learnt
Er
Errors
6,596 learnt
In
Inheritance
6,596 learnt
Ar
Array Transformations
6,709 learnt
Te
Template Strings
10,195 learnt
Te
Ternary Operator
10,195 learnt
Pr
Prototypes & Classes
6,629 learnt
Re
Regular Expressions
3,128 learnt
25 active learning exercises
Started
Attempts
Completions
Mentoring requests
Lucian's Luscious Lasagna Lucian's Luscious Lasagna
113,459
594,281 (avg. 5.2)
60,745 (53.5%)
620 (0.5%)
Annalyn's Infiltration Annalyn's Infiltration
43,542
688,701 (avg. 15.8)
34,511 (79.3%)
560 (1.3%)
Freelancer Rates Freelancer Rates
43,757
550,612 (avg. 12.6)
33,849 (77.4%)
578 (1.3%)
Poetry Club Door Policy Poetry Club Door Policy
33,393
479,702 (avg. 14.4)
29,817 (89.3%)
325 (1.0%)
Elyses Enchantments Elyses Enchantments
26,221
362,976 (avg. 13.8)
24,523 (93.5%)
149 (0.6%)
Vehicle Purchase Vehicle Purchase
23,744
230,573 (avg. 9.7)
22,934 (96.6%)
221 (0.9%)
Bird Watcher Bird Watcher
21,699
312,597 (avg. 14.4)
20,141 (92.8%)
241 (1.1%)
Mixed Juices Mixed Juices
19,319
392,358 (avg. 20.3)
16,511 (85.5%)
294 (1.5%)
Lucky Numbers Lucky Numbers
13,142
230,877 (avg. 17.6)
12,456 (94.8%)
136 (1.0%)
Elyses Analytic Enchantments Elyses Analytic Enchantments
8,916
67,633 (avg. 7.6)
8,754 (98.2%)
42 (0.5%)
Elyses Destructured Enchantments Elyses Destructured Enchantments
10,074
110,474 (avg. 11.0)
9,788 (97.2%)
95 (0.9%)
Elyses Looping Enchantments Elyses Looping Enchantments
7,446
47,704 (avg. 6.4)
7,289 (97.9%)
57 (0.8%)
Amusement Park Amusement Park
14,640
234,161 (avg. 16.0)
13,970 (95.4%)
156 (1.1%)
Pizza Order Pizza Order
2,516
37,824 (avg. 15.0)
2,093 (83.2%)
31 (1.2%)
Coordinate Transformation Coordinate Transformation
10,694
201,563 (avg. 18.8)
8,988 (84.0%)
203 (1.9%)
Fruit Picker Fruit Picker
10,203
117,726 (avg. 11.5)
9,350 (91.6%)
85 (0.8%)
Translation Service Translation Service
5,704
189,768 (avg. 33.3)
3,639 (63.8%)
109 (1.9%)
High Score Board High Score Board
16,211
248,587 (avg. 15.3)
15,259 (94.1%)
125 (0.8%)
Ozan's Playlist Ozan's Playlist
5,647
70,564 (avg. 12.5)
5,469 (96.8%)
47 (0.8%)
Lasagna Master Lasagna Master
12,454
222,220 (avg. 17.8)
11,867 (95.3%)
168 (1.3%)
Factory Sensors Factory Sensors
6,925
94,613 (avg. 13.7)
6,596 (95.2%)
62 (0.9%)
Elyses Transformative Enchantments Elyses Transformative Enchantments
7,114
151,959 (avg. 21.4)
6,709 (94.3%)
80 (1.1%)
Custom Signs Custom Signs
10,355
86,232 (avg. 8.3)
10,195 (98.5%)
41 (0.4%)
Windowing System Windowing System
7,691
173,972 (avg. 22.6)
6,629 (86.2%)
131 (1.7%)
Regular Chatbot Regular Chatbot
3,560
63,960 (avg. 18.0)
3,128 (87.9%)
33 (0.9%)
1 deprecated learning exercises
Started
Attempts
Completions
Mentoring requests
Employee Badges Employee Badges
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)

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: 29db4a434a6de197f9abfb51705fe4319685cece (Updates should be instant)

Next goal: Implement 131 practice exercises. Find out more.
121 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
254,038
727,723 (avg. 2.9)
179,248 (70.6%)
108 (0.0%)
Two Fer Two Fer
27,713
49,412 (avg. 1.8)
21,182 (76.4%)
7,472 (27.0%)
Resistor Color Resistor Color
16,968
38,543 (avg. 2.3)
13,704 (80.8%)
3,430 (20.2%)
Resistor Color Duo Resistor Color Duo
12,920
40,740 (avg. 3.2)
10,368 (80.2%)
4,348 (33.7%)
Gigasecond Gigasecond
16,754
57,262 (avg. 3.4)
12,094 (72.2%)
2,578 (15.4%)
RNA Transcription RNA Transcription
14,806
36,691 (avg. 2.5)
12,998 (87.8%)
2,892 (19.5%)
Space Age Space Age
9,489
42,032 (avg. 4.4)
8,024 (84.6%)
1,691 (17.8%)
Pangram Pangram
9,753
36,936 (avg. 3.8)
8,384 (86.0%)
1,489 (15.3%)
Matrix Matrix
6,491
47,558 (avg. 7.3)
4,560 (70.3%)
962 (14.8%)
Bob Bob
10,818
60,283 (avg. 5.6)
8,788 (81.2%)
1,620 (15.0%)
Book Store Book Store
1,869
33,052 (avg. 17.7)
795 (42.5%)
64 (3.4%)
Pascal's Triangle Pascal's Triangle
4,356
20,369 (avg. 4.7)
3,076 (70.6%)
515 (11.8%)
Linked List Linked List
3,304
19,837 (avg. 6.0)
2,197 (66.5%)
389 (11.8%)
Grade School Grade School
3,431
21,558 (avg. 6.3)
2,589 (75.5%)
318 (9.3%)
List Ops List Ops
1,987
20,205 (avg. 10.2)
1,274 (64.1%)
205 (10.3%)
Robot Name Robot Name
2,821
15,707 (avg. 5.6)
1,997 (70.8%)
217 (7.7%)
Simple Cipher Simple Cipher
3,242
13,060 (avg. 4.0)
2,193 (67.6%)
385 (11.9%)
Wordy Wordy
1,583
14,649 (avg. 9.3)
1,087 (68.7%)
99 (6.3%)
Secret Handshake Secret Handshake
1,607
4,789 (avg. 3.0)
1,248 (77.7%)
91 (5.7%)
Leap Leap
19,698
42,867 (avg. 2.2)
16,114 (81.8%)
3,029 (15.4%)
Reverse String Reverse String
9,697
18,103 (avg. 1.9)
8,268 (85.3%)
277 (2.9%)
Collatz Conjecture Collatz Conjecture
5,191
18,721 (avg. 3.6)
4,167 (80.3%)
204 (3.9%)
Triangle Triangle
5,968
30,411 (avg. 5.1)
4,236 (71.0%)
318 (5.3%)
Clock Clock
2,778
12,965 (avg. 4.7)
1,810 (65.2%)
104 (3.7%)
Meetup Meetup
1,750
7,465 (avg. 4.3)
979 (55.9%)
36 (2.1%)
ETL ETL
3,676
13,926 (avg. 3.8)
3,037 (82.6%)
66 (1.8%)
Hamming Hamming
7,706
16,984 (avg. 2.2)
6,935 (90.0%)
371 (4.8%)
Raindrops Raindrops
5,288
25,030 (avg. 4.7)
4,463 (84.4%)
131 (2.5%)
Nucleotide Count Nucleotide Count
1,951
6,149 (avg. 3.2)
1,641 (84.1%)
93 (4.8%)
Scrabble Score Scrabble Score
4,686
19,959 (avg. 4.3)
2,920 (62.3%)
108 (2.3%)
Allergies Allergies
3,118
14,630 (avg. 4.7)
1,591 (51.0%)
51 (1.6%)
Word Count Word Count
7,622
46,193 (avg. 6.1)
4,463 (58.6%)
505 (6.6%)
Bank Account Bank Account
4,693
35,647 (avg. 7.6)
2,089 (44.5%)
56 (1.2%)
Difference of Squares Difference of Squares
2,213
8,587 (avg. 3.9)
1,869 (84.5%)
30 (1.4%)
Perfect Numbers Perfect Numbers
2,944
13,658 (avg. 4.6)
2,217 (75.3%)
52 (1.8%)
Complex Numbers Complex Numbers
818
3,730 (avg. 4.6)
582 (71.1%)
5 (0.6%)
Luhn Luhn
1,848
15,268 (avg. 8.3)
1,338 (72.4%)
42 (2.3%)
Prime Factors Prime Factors
2,259
7,036 (avg. 3.1)
1,864 (82.5%)
87 (3.9%)
Grains Grains
1,997
9,138 (avg. 4.6)
1,563 (78.3%)
53 (2.7%)
Pythagorean Triplet Pythagorean Triplet
1,236
4,876 (avg. 3.9)
776 (62.8%)
20 (1.6%)
Palindrome Products Palindrome Products
1,140
8,562 (avg. 7.5)
610 (53.5%)
16 (1.4%)
Anagram Anagram
4,521
24,191 (avg. 5.4)
3,808 (84.2%)
250 (5.5%)
Acronym Acronym
2,324
13,928 (avg. 6.0)
1,955 (84.1%)
39 (1.7%)
High Scores High Scores
1,936
9,040 (avg. 4.7)
1,522 (78.6%)
24 (1.2%)
Isogram Isogram
3,389
14,186 (avg. 4.2)
2,828 (83.4%)
65 (1.9%)
Matching Brackets Matching Brackets
3,120
23,445 (avg. 7.5)
1,717 (55.0%)
53 (1.7%)
Phone Number Phone Number
3,189
25,782 (avg. 8.1)
2,569 (80.6%)
87 (2.7%)
Scale Generator Scale Generator
2,229
7,869 (avg. 3.5)
588 (26.4%)
11 (0.5%)
Series Series
1,986
12,523 (avg. 6.3)
1,384 (69.7%)
22 (1.1%)
Largest Series Product Largest Series Product
1,231
6,874 (avg. 5.6)
827 (67.2%)
14 (1.1%)
Transpose Transpose
2,558
31,088 (avg. 12.2)
1,099 (43.0%)
32 (1.3%)
Grep Grep
526
3,071 (avg. 5.8)
249 (47.3%)
9 (1.7%)
Rectangles Rectangles
3,183
7,988 (avg. 2.5)
418 (13.1%)
17 (0.5%)
Spiral Matrix Spiral Matrix
774
3,441 (avg. 4.4)
486 (62.8%)
13 (1.7%)
OCR Numbers OCR Numbers
1,331
5,787 (avg. 4.3)
492 (37.0%)
9 (0.7%)
Saddle Points Saddle Points
1,072
4,777 (avg. 4.5)
630 (58.8%)
14 (1.3%)
Forth Forth
1,001
5,204 (avg. 5.2)
334 (33.4%)
15 (1.5%)
Food Chain Food Chain
1,988
6,097 (avg. 3.1)
1,359 (68.4%)
28 (1.4%)
House House
787
4,379 (avg. 5.6)
401 (51.0%)
3 (0.4%)
ISBN Verifier ISBN Verifier
1,111
6,376 (avg. 5.7)
730 (65.7%)
31 (2.8%)
Pig Latin Pig Latin
1,110
5,846 (avg. 5.3)
667 (60.1%)
20 (1.8%)
Proverb Proverb
593
3,444 (avg. 5.8)
457 (77.1%)
7 (1.2%)
Twelve Days Twelve Days
612
4,903 (avg. 8.0)
419 (68.5%)
8 (1.3%)
Promises Promises
1,052
8,998 (avg. 8.6)
254 (24.1%)
9 (0.9%)
Yacht Yacht
474
3,286 (avg. 6.9)
348 (73.4%)
12 (2.5%)
Resistor Color Trio Resistor Color Trio
572
3,944 (avg. 6.9)
433 (75.7%)
13 (2.3%)
Dominoes Dominoes
349
1,920 (avg. 5.5)
189 (54.2%)
5 (1.4%)
Say Say
584
3,457 (avg. 5.9)
409 (70.0%)
4 (0.7%)
Diamond Diamond
672
3,757 (avg. 5.6)
461 (68.6%)
9 (1.3%)
Rational Numbers Rational Numbers
467
2,243 (avg. 4.8)
331 (70.9%)
2 (0.4%)
Sublist Sublist
698
2,975 (avg. 4.3)
510 (73.1%)
8 (1.1%)
Binary Search Tree Binary Search Tree
723
2,732 (avg. 3.8)
484 (66.9%)
10 (1.4%)
Custom Set Custom Set
607
2,946 (avg. 4.9)
427 (70.3%)
4 (0.7%)
Binary Search Binary Search
695
2,391 (avg. 3.4)
525 (75.5%)
8 (1.2%)
Circular Buffer Circular Buffer
822
2,566 (avg. 3.1)
621 (75.5%)
17 (2.1%)
Simple Linked List Simple Linked List
677
4,024 (avg. 5.9)
411 (60.7%)
7 (1.0%)
Word Search Word Search
612
3,996 (avg. 6.5)
249 (40.7%)
6 (1.0%)
Variable Length Quantity Variable Length Quantity
318
1,368 (avg. 4.3)
190 (59.7%)
1 (0.3%)
Two Bucket Two Bucket
450
1,460 (avg. 3.2)
252 (56.0%)
4 (0.9%)
Alphametics Alphametics
407
2,154 (avg. 5.3)
177 (43.5%)
5 (1.2%)
Connect Connect
307
1,479 (avg. 4.8)
176 (57.3%)
1 (0.3%)
Bowling Bowling
928
8,686 (avg. 9.4)
299 (32.2%)
4 (0.4%)
Strain Strain
1,024
1,854 (avg. 1.8)
768 (75.0%)
17 (1.7%)
Flatten Array Flatten Array
1,298
6,556 (avg. 5.1)
855 (65.9%)
28 (2.2%)
Nth Prime Nth Prime
980
3,648 (avg. 3.7)
619 (63.2%)
3 (0.3%)
Sieve Sieve
840
2,228 (avg. 2.7)
635 (75.6%)
7 (0.8%)
Rotational Cipher Rotational Cipher
2,525
16,321 (avg. 6.5)
1,200 (47.5%)
46 (1.8%)
Diffie-Hellman Diffie-Hellman
2,163
7,766 (avg. 3.6)
872 (40.3%)
15 (0.7%)
Affine Cipher Affine Cipher
318
2,547 (avg. 8.0)
200 (62.9%)
6 (1.9%)
Atbash Cipher Atbash Cipher
841
3,890 (avg. 4.6)
638 (75.9%)
13 (1.5%)
Crypto Square Crypto Square
858
3,241 (avg. 3.8)
566 (66.0%)
18 (2.1%)
Robot Simulator Robot Simulator
1,010
5,371 (avg. 5.3)
578 (57.2%)
12 (1.2%)
Kindergarten Garden Kindergarten Garden
500
1,500 (avg. 3.0)
392 (78.4%)
6 (1.2%)
Sum of Multiples Sum of Multiples
1,093
5,187 (avg. 4.7)
670 (61.3%)
26 (2.4%)
Change Change
901
6,486 (avg. 7.2)
266 (29.5%)
7 (0.8%)
Protein Translation Protein Translation
4,736
22,250 (avg. 4.7)
2,590 (54.7%)
363 (7.7%)
Armstrong Numbers Armstrong Numbers
4,107
13,340 (avg. 3.2)
2,912 (70.9%)
191 (4.7%)
D&D Character D&D Character
2,345
12,966 (avg. 5.5)
1,224 (52.2%)
70 (3.0%)
Run-Length Encoding Run-Length Encoding
3,352
14,027 (avg. 4.2)
1,838 (54.8%)
117 (3.5%)
Darts Darts
3,874
8,883 (avg. 2.3)
2,403 (62.0%)
91 (2.3%)
Roman Numerals Roman Numerals
3,752
12,110 (avg. 3.2)
2,145 (57.2%)
82 (2.2%)
Square Root Square Root
1,048
2,195 (avg. 2.1)
676 (64.5%)
20 (1.9%)
All Your Base All Your Base
1,378
4,226 (avg. 3.1)
692 (50.2%)
42 (3.0%)
Minesweeper Minesweeper
1,441
4,295 (avg. 3.0)
661 (45.9%)
49 (3.4%)
Queen Attack Queen Attack
1,451
5,492 (avg. 3.8)
788 (54.3%)
48 (3.3%)
React React
1,907
4,644 (avg. 2.4)
323 (16.9%)
17 (0.9%)
Zipper Zipper
1,337
2,168 (avg. 1.6)
291 (21.8%)
20 (1.5%)
Zebra Puzzle Zebra Puzzle
196
828 (avg. 4.2)
116 (59.2%)
0 (0.0%)
Tournament Tournament
741
12,106 (avg. 16.3)
391 (52.8%)
20 (2.7%)
Rail Fence Cipher Rail Fence Cipher
689
10,202 (avg. 14.8)
349 (50.7%)
13 (1.9%)
REST API REST API
246
2,232 (avg. 9.1)
153 (62.2%)
2 (0.8%)
Go Counting Go Counting
138
977 (avg. 7.1)
102 (73.9%)
4 (2.9%)
Knapsack Knapsack
266
1,980 (avg. 7.4)
151 (56.8%)
2 (0.8%)
Satellite Satellite
166
666 (avg. 4.0)
117 (70.5%)
0 (0.0%)
Poker Poker
293
5,514 (avg. 18.8)
122 (41.6%)
4 (1.4%)
Eliud's Eggs Eliud's Eggs
79
321 (avg. 4.1)
68 (86.1%)
2 (2.5%)
Parallel Letter Frequency Parallel Letter Frequency
65
542 (avg. 8.3)
40 (61.5%)
0 (0.0%)
Bottle Song Bottle Song
69
431 (avg. 6.2)
36 (52.2%)
3 (4.3%)
Markdown Markdown
157
194 (avg. 1.2)
53 (33.8%)
0 (0.0%)
Micro Blog Micro Blog
12
45 (avg. 3.8)
8 (66.7%)
0 (0.0%)
Ledger Ledger
16
66 (avg. 4.1)
3 (18.8%)
0 (0.0%)
101 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
556
648 (avg. 1.2)
439 (79.0%)
11 (2.0%)
Accumulate (Legacy) Accumulate (Legacy)
10
12 (avg. 1.2)
10 (100.0%)
0 (0.0%)
Acronym (Legacy) Acronym (Legacy)
7
9 (avg. 1.3)
7 (100.0%)
0 (0.0%)
All Your Base (Legacy) All Your Base (Legacy)
2
2 (avg. 1.0)
2 (100.0%)
0 (0.0%)
Allergies (Legacy) Allergies (Legacy)
12
18 (avg. 1.5)
12 (100.0%)
0 (0.0%)
Alphametics (Legacy) Alphametics (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Anagram (Legacy) Anagram (Legacy)
32
58 (avg. 1.8)
32 (100.0%)
6 (18.8%)
Armstrong Numbers (Legacy) Armstrong Numbers (Legacy)
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Atbash Cipher (Legacy) Atbash Cipher (Legacy)
9
14 (avg. 1.6)
9 (100.0%)
1 (11.1%)
Beer Song Beer Song
2,256
6,342 (avg. 2.8)
1,968 (87.2%)
90 (4.0%)
Beer Song (Legacy) Beer Song (Legacy)
31
39 (avg. 1.3)
31 (100.0%)
2 (6.5%)
Binary Binary
775
1,042 (avg. 1.3)
754 (97.3%)
38 (4.9%)
Binary (Legacy) Binary (Legacy)
15
20 (avg. 1.3)
15 (100.0%)
0 (0.0%)
Binary Search (Legacy) Binary Search (Legacy)
4
6 (avg. 1.5)
4 (100.0%)
0 (0.0%)
Binary Search Tree (Legacy) Binary Search Tree (Legacy)
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Bob (Legacy) Bob (Legacy)
94
144 (avg. 1.5)
94 (100.0%)
16 (17.0%)
Bowling (Legacy) Bowling (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Bracket Push (Legacy) Bracket Push (Legacy)
6
6 (avg. 1.0)
6 (100.0%)
0 (0.0%)
Change (Legacy) Change (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Circular Buffer (Legacy) Circular Buffer (Legacy)
11
17 (avg. 1.5)
11 (100.0%)
2 (18.2%)
Clock (Legacy) Clock (Legacy)
14
23 (avg. 1.6)
14 (100.0%)
4 (28.6%)
Collatz Conjecture (Legacy) Collatz Conjecture (Legacy)
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Connect (Legacy) Connect (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Crypto Square (Legacy) Crypto Square (Legacy)
8
9 (avg. 1.1)
8 (100.0%)
0 (0.0%)
Custom Set (Legacy) Custom Set (Legacy)
4
6 (avg. 1.5)
4 (100.0%)
0 (0.0%)
Diamond (Legacy) Diamond (Legacy)
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Difference Of Squares (Legacy) Difference Of Squares (Legacy)
6
7 (avg. 1.2)
6 (100.0%)
1 (16.7%)
Diffie Hellman (Legacy) Diffie Hellman (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Etl (Legacy) Etl (Legacy)
23
29 (avg. 1.3)
23 (100.0%)
2 (8.7%)
Flatten Array (Legacy) Flatten Array (Legacy)
2
2 (avg. 1.0)
2 (100.0%)
0 (0.0%)
Food Chain (Legacy) Food Chain (Legacy)
18
27 (avg. 1.5)
18 (100.0%)
2 (11.1%)
Forth (Legacy) Forth (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Gigasecond (Legacy) Gigasecond (Legacy)
64
81 (avg. 1.3)
64 (100.0%)
7 (10.9%)
Grade School (Legacy) Grade School (Legacy)
25
36 (avg. 1.4)
25 (100.0%)
4 (16.0%)
Grains (Legacy) Grains (Legacy)
17
23 (avg. 1.4)
17 (100.0%)
2 (11.8%)
Hamming (Legacy) Hamming (Legacy)
127
182 (avg. 1.4)
127 (100.0%)
9 (7.1%)
Hello World (Legacy) Hello World (Legacy)
506
584 (avg. 1.2)
506 (100.0%)
3 (0.6%)
Hexadecimal Hexadecimal
141
165 (avg. 1.2)
136 (96.5%)
2 (1.4%)
Hexadecimal (Legacy) Hexadecimal (Legacy)
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Isbn Verifier (Legacy) Isbn Verifier (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Isogram (Legacy) Isogram (Legacy)
8
10 (avg. 1.3)
8 (100.0%)
0 (0.0%)
Kindergarten Garden (Legacy) Kindergarten Garden (Legacy)
4
7 (avg. 1.8)
4 (100.0%)
0 (0.0%)
Largest Series Product (Legacy) Largest Series Product (Legacy)
5
5 (avg. 1.0)
5 (100.0%)
0 (0.0%)
Leap (Legacy) Leap (Legacy)
307
434 (avg. 1.4)
307 (100.0%)
51 (16.6%)
Linked List (Legacy) Linked List (Legacy)
10
13 (avg. 1.3)
10 (100.0%)
0 (0.0%)
List Ops (Legacy) List Ops (Legacy)
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Luhn (Legacy) Luhn (Legacy)
6
10 (avg. 1.7)
6 (100.0%)
2 (33.3%)
Matrix (Legacy) Matrix (Legacy)
8
9 (avg. 1.1)
8 (100.0%)
0 (0.0%)
Meetup (Legacy) Meetup (Legacy)
3
4 (avg. 1.3)
3 (100.0%)
0 (0.0%)
Minesweeper (Legacy) Minesweeper (Legacy)
3
2 (avg. 0.7)
3 (100.0%)
0 (0.0%)
Nth Prime (Legacy) Nth Prime (Legacy)
4
4 (avg. 1.0)
4 (100.0%)
0 (0.0%)
Nucleotide Count (Legacy) Nucleotide Count (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Ocr Numbers (Legacy) Ocr Numbers (Legacy)
3
4 (avg. 1.3)
3 (100.0%)
0 (0.0%)
Octal Octal
192
214 (avg. 1.1)
188 (97.9%)
1 (0.5%)
Octal (Legacy) Octal (Legacy)
5
8 (avg. 1.6)
5 (100.0%)
0 (0.0%)
Palindrome Products (Legacy) Palindrome Products (Legacy)
4
8 (avg. 2.0)
4 (100.0%)
0 (0.0%)
Pangram (Legacy) Pangram (Legacy)
58
87 (avg. 1.5)
58 (100.0%)
7 (12.1%)
Pascals Triangle (Legacy) Pascals Triangle (Legacy)
7
8 (avg. 1.1)
7 (100.0%)
0 (0.0%)
Perfect Numbers (Legacy) Perfect Numbers (Legacy)
3
4 (avg. 1.3)
3 (100.0%)
0 (0.0%)
Phone Number (Legacy) Phone Number (Legacy)
31
41 (avg. 1.3)
31 (100.0%)
1 (3.2%)
Pig Latin (Legacy) Pig Latin (Legacy)
6
6 (avg. 1.0)
6 (100.0%)
0 (0.0%)
Point Mutations Point Mutations
66
94 (avg. 1.4)
64 (97.0%)
10 (15.2%)
Point Mutations (Legacy) Point Mutations (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Prime Factors (Legacy) Prime Factors (Legacy)
13
17 (avg. 1.3)
13 (100.0%)
0 (0.0%)
Protein Translation (Legacy) Protein Translation (Legacy)
3
6 (avg. 2.0)
3 (100.0%)
0 (0.0%)
Proverb (Legacy) Proverb (Legacy)
1
2 (avg. 2.0)
1 (100.0%)
1 (100.0%)
Pythagorean Triplet (Legacy) Pythagorean Triplet (Legacy)
6
8 (avg. 1.3)
6 (100.0%)
0 (0.0%)
Queen Attack (Legacy) Queen Attack (Legacy)
5
7 (avg. 1.4)
5 (100.0%)
1 (20.0%)
Raindrops (Legacy) Raindrops (Legacy)
12
14 (avg. 1.2)
12 (100.0%)
1 (8.3%)
Rational Numbers (Legacy) Rational Numbers (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Rectangles (Legacy) Rectangles (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Reverse String (Legacy) Reverse String (Legacy)
14
20 (avg. 1.4)
14 (100.0%)
1 (7.1%)
Rna Transcription (Legacy) Rna Transcription (Legacy)
174
263 (avg. 1.5)
174 (100.0%)
24 (13.8%)
Robot Name (Legacy) Robot Name (Legacy)
23
40 (avg. 1.7)
23 (100.0%)
5 (21.7%)
Robot Simulator (Legacy) Robot Simulator (Legacy)
5
6 (avg. 1.2)
5 (100.0%)
0 (0.0%)
Roman Numerals (Legacy) Roman Numerals (Legacy)
16
27 (avg. 1.7)
16 (100.0%)
1 (6.3%)
Rotational Cipher (Legacy) Rotational Cipher (Legacy)
2
2 (avg. 1.0)
2 (100.0%)
0 (0.0%)
Run Length Encoding (Legacy) Run Length Encoding (Legacy)
7
3 (avg. 0.4)
7 (100.0%)
0 (0.0%)
Saddle Points (Legacy) Saddle Points (Legacy)
3
4 (avg. 1.3)
3 (100.0%)
0 (0.0%)
Say (Legacy) Say (Legacy)
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Scrabble Score (Legacy) Scrabble Score (Legacy)
13
20 (avg. 1.5)
13 (100.0%)
1 (7.7%)
Secret Handshake (Legacy) Secret Handshake (Legacy)
10
12 (avg. 1.2)
10 (100.0%)
0 (0.0%)
Series (Legacy) Series (Legacy)
6
10 (avg. 1.7)
6 (100.0%)
2 (33.3%)
Sieve (Legacy) Sieve (Legacy)
9
12 (avg. 1.3)
9 (100.0%)
0 (0.0%)
Simple Cipher (Legacy) Simple Cipher (Legacy)
32
46 (avg. 1.4)
32 (100.0%)
5 (15.6%)
Simple Linked List (Legacy) Simple Linked List (Legacy)
2
2 (avg. 1.0)
2 (100.0%)
0 (0.0%)
Space Age (Legacy) Space Age (Legacy)
23
33 (avg. 1.4)
23 (100.0%)
3 (13.0%)
Strain (Legacy) Strain (Legacy)
9
11 (avg. 1.2)
9 (100.0%)
0 (0.0%)
Sublist (Legacy) Sublist (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Sum Of Multiples (Legacy) Sum Of Multiples (Legacy)
3
4 (avg. 1.3)
3 (100.0%)
1 (33.3%)
Transpose (Legacy) Transpose (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Triangle (Legacy) Triangle (Legacy)
19
34 (avg. 1.8)
19 (100.0%)
3 (15.8%)
Trinary Trinary
244
290 (avg. 1.2)
240 (98.4%)
2 (0.8%)
Trinary (Legacy) Trinary (Legacy)
5
6 (avg. 1.2)
5 (100.0%)
1 (20.0%)
Twelve Days (Legacy) Twelve Days (Legacy)
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Two Bucket (Legacy) Two Bucket (Legacy)
4
4 (avg. 1.0)
4 (100.0%)
0 (0.0%)
Two Fer (Legacy) Two Fer (Legacy)
15
19 (avg. 1.3)
15 (100.0%)
2 (13.3%)
Variable Length Quantity (Legacy) Variable Length Quantity (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Word Count (Legacy) Word Count (Legacy)
53
94 (avg. 1.8)
53 (100.0%)
13 (24.5%)
Wordy (Legacy) Wordy (Legacy)
8
8 (avg. 1.0)
8 (100.0%)
0 (0.0%)
Zipper (Legacy) Zipper (Legacy)
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
10 unimplemented practice exercises
DOT DSL DOT DSL
Error Handling Error Handling
Hangman Hangman
Killer Sudoku Helper Killer Sudoku Helper
Lens Person Lens Person
PaaS I/O PaaS I/O
POV POV
SGF Parsing SGF Parsing
State of Tic-Tac-Toe State of Tic-Tac-Toe
Tree Building Tree Building

Programming Tags

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

0 tags

Test Runner

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

Current version: f890016733a6f56cfa07b112a9ce9b50fdc5e962 (Takes up to 10 mins to deploy)

Total Test Runner Runs
7,992,966
Test Run Pass Rate
12.0% (961607)
Test Run Fail Rate
73.2% (5850404)
Test Run Error Rate
14.8% (1180955)

Representer

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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.

Current version: 962498482ecdd505ffe6e8aac066777e23cbc29b (Takes up to 10 mins to deploy)

Total Representer Runs
1,237,307
Total Representation Comments Made
323,967
Feedback Given Frequency
26.2%

Analyzer

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

Current version: 7d871dd1530dd293d465d2377a4bad5d90874865 (Takes up to 10 mins to deploy)

Total Analyzer Runs
905,935
Total Analysis Comments Made
144,492
Feedback Given Frequency
1.3%