Elixir
Elixir
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Elixir Track Management

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

Students
46,851
Submissions
3,149,739
Mentoring Discussions
27,105

The Elixir track is exemplar ✨

Building

Elixir 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.

57 concepts being taught
Ba
Basics
19,351 learnt
Bo
Booleans
15,773 learnt
Fl
Floating Point Numbers
13,921 learnt
In
Integers
13,921 learnt
An
Anonymous Functions
13,933 learnt
Bi
Bit Manipulation
13,933 learnt
At
Atoms
12,207 learnt
Co
Cond
12,207 learnt
Li
Lists
11,975 learnt
De
Default Arguments
10,887 learnt
Gu
Guards
10,887 learnt
Mu
Multiple Clause Functions
10,887 learnt
Pa
Pattern Matching
9,775 learnt
Tu
Tuples
9,775 learnt
Pi
Pipe Operator
8,899 learnt
St
Strings
8,899 learnt
Re
Recursion
8,334 learnt
Ma
Maps
7,916 learnt
Mo
Module Attributes As Constants
7,916 learnt
Do
Docs
6,585 learnt
Ty
Typespecs
6,585 learnt
Ca
Case
6,241 learnt
Ch
Charlists
6,241 learnt
IO
IO
5,888 learnt
If
If
6,291 learnt
Ni
Nil
6,291 learnt
PI
PIDs
5,272 learnt
Pr
Processes
5,272 learnt
Ke
Keyword Lists
4,991 learnt
Bi
Bitstrings
2,413 learnt
Ta
Tail Call Recursion
3,696 learnt
Da
Dates and Time
3,868 learnt
Ac
Access Behaviour
3,811 learnt
En
Enum
4,149 learnt
Bi
Binaries
2,842 learnt
Fi
File
2,894 learnt
Ra
Ranges
2,893 learnt
St
Structs
3,400 learnt
Li
List Comprehensions
2,924 learnt
Ag
Agent
2,683 learnt
Pr
Protocols
2,551 learnt
Er
Erlang Libraries
2,333 learnt
Ra
Randomness
2,333 learnt
Al
Alias
2,666 learnt
Im
Import
2,666 learnt
Er
Errors
2,609 learnt
Tr
Try/Rescue
2,609 learnt
Ex
Exceptions
2,160 learnt
Li
Links
1,947 learnt
Ta
Tasks
1,947 learnt
St
Streams
2,050 learnt
Wi
With
2,028 learnt
AS
AST
2,052 learnt
Be
Behaviours
1,632 learnt
Us
Use
1,632 learnt
Ge
GenServer
1,376 learnt
Re
Regular Expressions
2,180 learnt
40 active learning exercises
Started
Attempts
Completions
Mentoring requests
Lasagna Lasagna
21,469
105,030 (avg. 4.9)
19,351 (90.1%)
333 (1.6%)
Pacman Rules Pacman Rules
16,517
79,417 (avg. 4.8)
15,773 (95.5%)
241 (1.5%)
Freelancer Rates Freelancer Rates
15,233
207,480 (avg. 13.6)
13,921 (91.4%)
357 (2.3%)
Secrets Secrets
15,404
148,048 (avg. 9.6)
13,933 (90.5%)
296 (1.9%)
Log Level Log Level
12,920
109,128 (avg. 8.4)
12,207 (94.5%)
316 (2.4%)
Language List Language List
12,338
72,673 (avg. 5.9)
11,975 (97.1%)
221 (1.8%)
Guessing Game Guessing Game
11,258
110,105 (avg. 9.8)
10,887 (96.7%)
290 (2.6%)
Kitchen Calculator Kitchen Calculator
10,309
86,622 (avg. 8.4)
9,775 (94.8%)
293 (2.8%)
High School Sweetheart High School Sweetheart
9,216
119,714 (avg. 13.0)
8,899 (96.6%)
238 (2.6%)
Bird Count Bird Count
8,719
103,960 (avg. 11.9)
8,334 (95.6%)
282 (3.2%)
High Score High Score
8,199
86,786 (avg. 10.6)
7,916 (96.5%)
214 (2.6%)
City Office City Office
7,013
73,663 (avg. 10.5)
6,585 (93.9%)
186 (2.7%)
German Sysadmin German Sysadmin
6,920
89,370 (avg. 12.9)
6,241 (90.2%)
252 (3.6%)
RPG Character Sheet RPG Character Sheet
6,131
72,227 (avg. 11.8)
5,888 (96.0%)
204 (3.3%)
Name Badge Name Badge
6,436
44,763 (avg. 7.0)
6,291 (97.7%)
188 (2.9%)
Take-A-Number Take-A-Number
5,790
61,820 (avg. 10.7)
5,272 (91.1%)
227 (3.9%)
Wine Cellar Wine Cellar
5,340
61,982 (avg. 11.6)
4,991 (93.5%)
253 (4.7%)
Paint By Number Paint By Number
2,807
31,369 (avg. 11.2)
2,413 (86.0%)
121 (4.3%)
DNA Encoding DNA Encoding
4,074
62,071 (avg. 15.2)
3,696 (90.7%)
208 (5.1%)
Library Fees Library Fees
4,177
59,889 (avg. 14.3)
3,868 (92.6%)
219 (5.2%)
Basketball Website Basketball Website
4,038
22,516 (avg. 5.6)
3,811 (94.4%)
178 (4.4%)
Boutique Inventory Boutique Inventory
4,393
57,603 (avg. 13.1)
4,149 (94.4%)
207 (4.7%)
File Sniffer File Sniffer
2,979
23,136 (avg. 7.8)
2,842 (95.4%)
192 (6.4%)
Newsletter Newsletter
3,031
32,417 (avg. 10.7)
2,894 (95.5%)
173 (5.7%)
Chessboard Chessboard
2,934
15,057 (avg. 5.1)
2,893 (98.6%)
148 (5.0%)
Remote Control Car Remote Control Car
3,534
43,675 (avg. 12.4)
3,400 (96.2%)
199 (5.6%)
Boutique Suggestions Boutique Suggestions
3,012
24,617 (avg. 8.2)
2,924 (97.1%)
170 (5.6%)
Community Garden Community Garden
2,894
41,701 (avg. 14.4)
2,683 (92.7%)
194 (6.7%)
Bread And Potions Bread And Potions
2,646
16,205 (avg. 6.1)
2,551 (96.4%)
170 (6.4%)
Captain's Log Captain's Log
2,389
17,285 (avg. 7.2)
2,333 (97.7%)
154 (6.4%)
Need For Speed Need For Speed
2,712
9,047 (avg. 3.3)
2,666 (98.3%)
145 (5.3%)
RPN Calculator RPN Calculator
2,684
15,246 (avg. 5.7)
2,609 (97.2%)
156 (5.8%)
Stack Underflow Stack Underflow
2,238
16,978 (avg. 7.6)
2,160 (96.5%)
154 (6.9%)
RPN Calculator Inspection RPN Calculator Inspection
2,202
28,296 (avg. 12.9)
1,947 (88.4%)
178 (8.1%)
Lucas Numbers Lucas Numbers
2,181
19,403 (avg. 8.9)
2,050 (94.0%)
167 (7.7%)
New Passport New Passport
2,122
17,240 (avg. 8.1)
2,028 (95.6%)
151 (7.1%)
Top Secret Top Secret
2,512
49,241 (avg. 19.6)
2,052 (81.7%)
195 (7.8%)
Dancing Dots Dancing Dots
1,732
19,441 (avg. 11.2)
1,632 (94.2%)
163 (9.4%)
Take-A-Number Deluxe Take-A-Number Deluxe
1,573
24,617 (avg. 15.6)
1,376 (87.5%)
150 (9.5%)
Log Parser Log Parser
2,439
30,863 (avg. 12.7)
2,180 (89.4%)
162 (6.6%)
2 deprecated learning exercises
Started
Attempts
Completions
Mentoring requests
Date Parser Date Parser
1,463
25,962 (avg. 17.7)
1,198 (81.9%)
11 (0.8%)
Mensch Ärgere Dich Nicht Mensch Ärgere Dich Nicht
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: 436bc95ccdcc5588779800ea7210423622273c76 (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
122 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
39,606
58,538 (avg. 1.5)
35,301 (89.1%)
49 (0.1%)
Resistor Color Resistor Color
3,505
7,392 (avg. 2.1)
3,294 (94.0%)
69 (2.0%)
Two Fer Two Fer
4,202
20,188 (avg. 4.8)
3,909 (93.0%)
70 (1.7%)
Acronym Acronym
3,800
11,159 (avg. 2.9)
3,507 (92.3%)
152 (4.0%)
All Your Base All Your Base
1,689
14,542 (avg. 8.6)
1,371 (81.2%)
59 (3.5%)
Anagram Anagram
2,908
11,042 (avg. 3.8)
2,667 (91.7%)
182 (6.3%)
Armstrong Numbers Armstrong Numbers
1,174
4,290 (avg. 3.7)
1,104 (94.0%)
24 (2.0%)
Collatz Conjecture Collatz Conjecture
3,227
27,819 (avg. 8.6)
2,942 (91.2%)
80 (2.5%)
Darts Darts
5,550
27,840 (avg. 5.0)
4,653 (83.8%)
137 (2.5%)
ETL ETL
1,739
5,803 (avg. 3.3)
1,595 (91.7%)
48 (2.8%)
Hamming Hamming
2,204
6,858 (avg. 3.1)
2,061 (93.5%)
132 (6.0%)
Nth Prime Nth Prime
1,433
5,273 (avg. 3.7)
1,224 (85.4%)
49 (3.4%)
Nucleotide Count Nucleotide Count
7,940
14,168 (avg. 1.8)
6,756 (85.1%)
519 (6.5%)
Pangram Pangram
1,815
5,526 (avg. 3.0)
1,695 (93.4%)
67 (3.7%)
Pig Latin Pig Latin
2,256
9,616 (avg. 4.3)
1,693 (75.0%)
121 (5.4%)
Protein Translation Protein Translation
2,907
10,620 (avg. 3.7)
2,458 (84.6%)
193 (6.6%)
Raindrops Raindrops
2,706
7,073 (avg. 2.6)
2,506 (92.6%)
96 (3.5%)
Resistor Color Duo Resistor Color Duo
2,195
10,579 (avg. 4.8)
2,078 (94.7%)
30 (1.4%)
RNA Transcription RNA Transcription
7,802
13,106 (avg. 1.7)
5,852 (75.0%)
3,166 (40.6%)
Roman Numerals Roman Numerals
4,521
12,333 (avg. 2.7)
3,471 (76.8%)
1,337 (29.6%)
Rotational Cipher Rotational Cipher
3,542
7,797 (avg. 2.2)
2,943 (83.1%)
199 (5.6%)
Run-Length Encoding Run-Length Encoding
2,423
8,432 (avg. 3.5)
2,165 (89.4%)
122 (5.0%)
Scrabble Score Scrabble Score
2,214
6,484 (avg. 2.9)
2,057 (92.9%)
90 (4.1%)
Secret Handshake Secret Handshake
4,684
13,273 (avg. 2.8)
3,666 (78.3%)
294 (6.3%)
Series Series
1,860
5,647 (avg. 3.0)
1,664 (89.5%)
71 (3.8%)
Space Age Space Age
5,184
18,156 (avg. 3.5)
4,720 (91.0%)
158 (3.0%)
Strain Strain
3,848
9,979 (avg. 2.6)
3,385 (88.0%)
193 (5.0%)
Sublist Sublist
2,985
14,050 (avg. 4.7)
2,561 (85.8%)
160 (5.4%)
Sum of Multiples Sum of Multiples
1,676
4,337 (avg. 2.6)
1,549 (92.4%)
67 (4.0%)
Triangle Triangle
2,332
9,653 (avg. 4.1)
2,187 (93.8%)
80 (3.4%)
Atbash Cipher Atbash Cipher
750
3,794 (avg. 5.1)
688 (91.7%)
18 (2.4%)
Binary Search Binary Search
2,886
26,124 (avg. 9.1)
2,265 (78.5%)
193 (6.7%)
Binary Search Tree Binary Search Tree
1,062
6,174 (avg. 5.8)
896 (84.4%)
28 (2.6%)
Bob Bob
8,027
27,771 (avg. 3.5)
6,648 (82.8%)
2,363 (29.4%)
Bottle Song Bottle Song
305
1,933 (avg. 6.3)
272 (89.2%)
5 (1.6%)
D&D Character D&D Character
877
2,797 (avg. 3.2)
763 (87.0%)
48 (5.5%)
Eliud's Eggs Eliud's Eggs
943
3,666 (avg. 3.9)
830 (88.0%)
17 (1.8%)
Flatten Array Flatten Array
2,277
9,749 (avg. 4.3)
2,083 (91.5%)
66 (2.9%)
Gigasecond Gigasecond
1,368
3,411 (avg. 2.5)
1,209 (88.4%)
36 (2.6%)
Grade School Grade School
1,572
5,969 (avg. 3.8)
1,396 (88.8%)
71 (4.5%)
Grains Grains
1,163
3,126 (avg. 2.7)
1,088 (93.6%)
32 (2.8%)
House House
411
2,552 (avg. 6.2)
362 (88.1%)
4 (1.0%)
ISBN Verifier ISBN Verifier
712
3,383 (avg. 4.8)
603 (84.7%)
27 (3.8%)
Isogram Isogram
1,152
2,687 (avg. 2.3)
1,058 (91.8%)
52 (4.5%)
Kindergarten Garden Kindergarten Garden
736
3,652 (avg. 5.0)
631 (85.7%)
18 (2.4%)
Leap Leap
5,691
24,875 (avg. 4.4)
5,343 (93.9%)
129 (2.3%)
Matching Brackets Matching Brackets
1,388
4,303 (avg. 3.1)
1,219 (87.8%)
77 (5.5%)
Matrix Matrix
1,106
5,809 (avg. 5.3)
900 (81.4%)
42 (3.8%)
Pascal's Triangle Pascal's Triangle
698
2,544 (avg. 3.6)
600 (86.0%)
15 (2.1%)
Perfect Numbers Perfect Numbers
928
4,581 (avg. 4.9)
831 (89.5%)
25 (2.7%)
Prime Factors Prime Factors
1,056
3,543 (avg. 3.4)
921 (87.2%)
25 (2.4%)
Proverb Proverb
447
2,265 (avg. 5.1)
403 (90.2%)
9 (2.0%)
Resistor Color Trio Resistor Color Trio
1,630
13,847 (avg. 8.5)
1,433 (87.9%)
42 (2.6%)
Say Say
676
4,681 (avg. 6.9)
519 (76.8%)
27 (4.0%)
Simple Cipher Simple Cipher
467
2,880 (avg. 6.2)
380 (81.4%)
12 (2.6%)
Twelve Days Twelve Days
1,486
3,036 (avg. 2.0)
1,259 (84.7%)
82 (5.5%)
Word Count Word Count
7,454
18,018 (avg. 2.4)
6,177 (82.9%)
2,410 (32.3%)
Allergies Allergies
1,097
4,825 (avg. 4.4)
936 (85.3%)
33 (3.0%)
Complex Numbers Complex Numbers
461
3,872 (avg. 8.4)
417 (90.5%)
9 (2.0%)
Crypto Square Crypto Square
453
2,874 (avg. 6.3)
391 (86.3%)
15 (3.3%)
Difference of Squares Difference of Squares
525
1,149 (avg. 2.2)
474 (90.3%)
15 (2.9%)
Dominoes Dominoes
421
2,731 (avg. 6.5)
275 (65.3%)
8 (1.9%)
Grep Grep
425
5,121 (avg. 12.0)
299 (70.4%)
16 (3.8%)
Killer Sudoku Helper Killer Sudoku Helper
199
1,515 (avg. 7.6)
158 (79.4%)
3 (1.5%)
Largest Series Product Largest Series Product
524
2,101 (avg. 4.0)
464 (88.5%)
11 (2.1%)
Meetup Meetup
898
2,562 (avg. 2.9)
763 (85.0%)
37 (4.1%)
Parallel Letter Frequency Parallel Letter Frequency
1,141
5,477 (avg. 4.8)
855 (74.9%)
53 (4.6%)
Phone Number Phone Number
1,347
4,438 (avg. 3.3)
1,192 (88.5%)
67 (5.0%)
Rational Numbers Rational Numbers
3,767
59,623 (avg. 15.8)
2,425 (64.4%)
118 (3.1%)
Simple Linked List Simple Linked List
1,086
4,725 (avg. 4.4)
882 (81.2%)
35 (3.2%)
Spiral Matrix Spiral Matrix
500
2,636 (avg. 5.3)
312 (62.4%)
10 (2.0%)
Tournament Tournament
803
5,578 (avg. 6.9)
567 (70.6%)
57 (7.1%)
Affine Cipher Affine Cipher
236
2,912 (avg. 12.3)
195 (82.6%)
4 (1.7%)
Bank Account Bank Account
1,636
4,606 (avg. 2.8)
1,315 (80.4%)
445 (27.2%)
Clock Clock
467
2,951 (avg. 6.3)
380 (81.4%)
33 (7.1%)
Custom Set Custom Set
396
2,748 (avg. 6.9)
317 (80.1%)
13 (3.3%)
Diamond Diamond
472
2,204 (avg. 4.7)
384 (81.4%)
12 (2.5%)
Food Chain Food Chain
247
1,969 (avg. 8.0)
188 (76.1%)
4 (1.6%)
Intergalactic Transmission Intergalactic Transmission
14
101 (avg. 7.2)
6 (42.9%)
0 (0.0%)
Luhn Luhn
748
4,067 (avg. 5.4)
630 (84.2%)
28 (3.7%)
Palindrome Products Palindrome Products
427
1,834 (avg. 4.3)
344 (80.6%)
11 (2.6%)
Pythagorean Triplet Pythagorean Triplet
430
1,274 (avg. 3.0)
366 (85.1%)
11 (2.6%)
Saddle Points Saddle Points
463
1,838 (avg. 4.0)
377 (81.4%)
14 (3.0%)
Scale Generator Scale Generator
416
2,059 (avg. 4.9)
288 (69.2%)
12 (2.9%)
Sieve Sieve
591
2,320 (avg. 3.9)
506 (85.6%)
19 (3.2%)
Square Root Square Root
839
3,582 (avg. 4.3)
733 (87.4%)
11 (1.3%)
Transpose Transpose
413
3,301 (avg. 8.0)
277 (67.1%)
10 (2.4%)
Yacht Yacht
385
3,351 (avg. 8.7)
345 (89.6%)
11 (2.9%)
Game of Life Game of Life
81
434 (avg. 5.4)
52 (64.2%)
3 (3.7%)
Knapsack Knapsack
543
3,843 (avg. 7.1)
326 (60.0%)
16 (2.9%)
Ledger Ledger
179
1,809 (avg. 10.1)
126 (70.4%)
11 (6.1%)
List Ops List Ops
2,849
8,862 (avg. 3.1)
2,455 (86.2%)
766 (26.9%)
Markdown Markdown
1,393
3,336 (avg. 2.4)
932 (66.9%)
527 (37.8%)
OCR Numbers OCR Numbers
309
1,885 (avg. 6.1)
226 (73.1%)
12 (3.9%)
Rail Fence Cipher Rail Fence Cipher
313
1,836 (avg. 5.9)
222 (70.9%)
9 (2.9%)
Relative Distance Relative Distance
8
30 (avg. 3.8)
3 (37.5%)
0 (0.0%)
Robot Simulator Robot Simulator
1,947
6,357 (avg. 3.3)
1,462 (75.1%)
697 (35.8%)
Satellite Satellite
193
1,054 (avg. 5.5)
144 (74.6%)
3 (1.6%)
State of Tic-Tac-Toe State of Tic-Tac-Toe
226
1,630 (avg. 7.2)
155 (68.6%)
4 (1.8%)
Swift Scheduling Swift Scheduling
17
61 (avg. 3.6)
10 (58.8%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
418
4,781 (avg. 11.4)
280 (67.0%)
14 (3.3%)
Alphametics Alphametics
235
1,757 (avg. 7.5)
121 (51.5%)
10 (4.3%)
Change Change
807
5,315 (avg. 6.6)
523 (64.8%)
36 (4.5%)
Connect Connect
238
1,062 (avg. 4.5)
148 (62.2%)
7 (2.9%)
Minesweeper Minesweeper
374
1,518 (avg. 4.1)
281 (75.1%)
10 (2.7%)
Queen Attack Queen Attack
560
2,337 (avg. 4.2)
455 (81.3%)
34 (6.1%)
Rectangles Rectangles
126
1,017 (avg. 8.1)
87 (69.0%)
2 (1.6%)
Two Bucket Two Bucket
128
658 (avg. 5.1)
83 (64.8%)
3 (2.3%)
Word Search Word Search
153
1,396 (avg. 9.1)
90 (58.8%)
3 (2.0%)
Wordy Wordy
323
1,115 (avg. 3.5)
260 (80.5%)
10 (3.1%)
Book Store Book Store
133
643 (avg. 4.8)
79 (59.4%)
3 (2.3%)
Bowling Bowling
678
2,941 (avg. 4.3)
357 (52.7%)
176 (26.0%)
Circular Buffer Circular Buffer
262
1,837 (avg. 7.0)
193 (73.7%)
15 (5.7%)
DOT DSL DOT DSL
344
1,549 (avg. 4.5)
177 (51.5%)
15 (4.4%)
Poker Poker
286
1,219 (avg. 4.3)
130 (45.5%)
12 (4.2%)
React React
220
1,855 (avg. 8.4)
106 (48.2%)
9 (4.1%)
SGF Parsing SGF Parsing
85
1,149 (avg. 13.5)
52 (61.2%)
0 (0.0%)
Zipper Zipper
816
1,425 (avg. 1.7)
502 (61.5%)
252 (30.9%)
Go Counting Go Counting
95
568 (avg. 6.0)
54 (56.8%)
3 (3.2%)
POV POV
100
770 (avg. 7.7)
69 (69.0%)
1 (1.0%)
Zebra Puzzle Zebra Puzzle
306
1,733 (avg. 5.7)
120 (39.2%)
3 (1.0%)
Forth Forth
470
2,836 (avg. 6.0)
294 (62.6%)
137 (29.1%)
5 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
2,707
4,660 (avg. 1.7)
2,497 (92.2%)
149 (5.5%)
Beer Song Beer Song
2,625
6,616 (avg. 2.5)
2,274 (86.6%)
919 (35.0%)
Binary Binary
472
615 (avg. 1.3)
418 (88.6%)
28 (5.9%)
Diffie-Hellman Diffie-Hellman
427
1,150 (avg. 2.7)
329 (77.0%)
7 (1.6%)
Hexadecimal Hexadecimal
276
329 (avg. 1.2)
235 (85.1%)
12 (4.3%)
7 unimplemented practice exercises
Baffling Birthdays Baffling Birthdays
View dataThe link opens in a new window or tab
Error Handling Error Handling
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Hangman Hangman
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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: 41da541f917be9c7154125607a30c64bcff775bc (Takes up to 10 mins to deploy)

Total Test Runner Runs
3,076,705
Test Run Pass Rate
19.8% (608507)
Test Run Fail Rate
56.2% (1728505)
Test Run Error Rate
24.0% (739693)

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: baeec1cd60e5827d270377e4f428f052af8b45c4 (Takes up to 10 mins to deploy)

Total Representer Runs
608,793
Total Representation Comments Made
32,140
Feedback Given Frequency
5.3%

Analyzer

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

Current version: bb56b9540f00cecb71b6e940d54e5d9a5ac64b3b (Takes up to 10 mins to deploy)

Total Analyzer Runs
610,590
Total Analysis Comments Made
573,581
Feedback Given Frequency
8.9%