Emacs Lisp
Emacs Lisp
About Emacs LispPractice

Emacs Lisp Track Management

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

Students
4,451
Submissions
26,618
Mentoring Discussions
962

The Emacs Lisp 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: cb6697204414199ef40c46d91993c25a8690990e (Updates should be instant)

Next goal: Implement 130 practice exercises. Find out more.
85 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
3,185
4,349 (avg. 1.4)
2,492 (78.2%)
6 (0.2%)
Acronym Acronym
314
640 (avg. 2.0)
186 (59.2%)
7 (2.2%)
Allergies Allergies
245
639 (avg. 2.6)
173 (70.6%)
7 (2.9%)
Armstrong Numbers Armstrong Numbers
199
309 (avg. 1.6)
151 (75.9%)
3 (1.5%)
Binary Search Binary Search
56
242 (avg. 4.3)
32 (57.1%)
0 (0.0%)
Bob Bob
537
1,371 (avg. 2.6)
375 (69.8%)
110 (20.5%)
Collatz Conjecture Collatz Conjecture
24
37 (avg. 1.5)
18 (75.0%)
0 (0.0%)
Darts Darts
53
81 (avg. 1.5)
37 (69.8%)
1 (1.9%)
Difference of Squares Difference of Squares
410
550 (avg. 1.3)
332 (81.0%)
17 (4.1%)
D&D Character D&D Character
20
80 (avg. 4.0)
13 (65.0%)
1 (5.0%)
Eliud's Eggs Eliud's Eggs
22
37 (avg. 1.7)
15 (68.2%)
0 (0.0%)
Gigasecond Gigasecond
300
624 (avg. 2.1)
198 (66.0%)
11 (3.7%)
Grains Grains
166
322 (avg. 1.9)
123 (74.1%)
5 (3.0%)
Hamming Hamming
409
864 (avg. 2.1)
327 (80.0%)
66 (16.1%)
Isogram Isogram
17
21 (avg. 1.2)
11 (64.7%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
14
14 (avg. 1.0)
6 (42.9%)
0 (0.0%)
Leap Leap
987
2,592 (avg. 2.6)
751 (76.1%)
115 (11.7%)
List Ops List Ops
76
296 (avg. 3.9)
43 (56.6%)
2 (2.6%)
Matching Brackets Matching Brackets
65
159 (avg. 2.4)
40 (61.5%)
2 (3.1%)
Pangram Pangram
218
321 (avg. 1.5)
155 (71.1%)
8 (3.7%)
Perfect Numbers Perfect Numbers
146
328 (avg. 2.2)
104 (71.2%)
1 (0.7%)
Phone Number Phone Number
133
192 (avg. 1.4)
90 (67.7%)
2 (1.5%)
Queen Attack Queen Attack
42
49 (avg. 1.2)
23 (54.8%)
0 (0.0%)
Robot Simulator Robot Simulator
14
21 (avg. 1.5)
5 (35.7%)
0 (0.0%)
RNA Transcription RNA Transcription
312
624 (avg. 2.0)
246 (78.8%)
41 (13.1%)
Raindrops Raindrops
173
268 (avg. 1.5)
131 (75.7%)
8 (4.6%)
Resistor Color Resistor Color
18
15 (avg. 0.8)
13 (72.2%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
17
19 (avg. 1.1)
12 (70.6%)
0 (0.0%)
Reverse String Reverse String
67
119 (avg. 1.8)
45 (67.2%)
1 (1.5%)
Roman Numerals Roman Numerals
388
882 (avg. 2.3)
249 (64.2%)
50 (12.9%)
Rotational Cipher Rotational Cipher
44
72 (avg. 1.6)
27 (61.4%)
0 (0.0%)
Scrabble Score Scrabble Score
14
12 (avg. 0.9)
8 (57.1%)
0 (0.0%)
Simple Cipher Simple Cipher
41
58 (avg. 1.4)
22 (53.7%)
0 (0.0%)
Space Age Space Age
14
17 (avg. 1.2)
8 (57.1%)
0 (0.0%)
Square Root Square Root
15
11 (avg. 0.7)
7 (46.7%)
0 (0.0%)
Sublist Sublist
58
105 (avg. 1.8)
33 (56.9%)
0 (0.0%)
Sum of Multiples Sum of Multiples
13
10 (avg. 0.8)
4 (30.8%)
0 (0.0%)
Triangle Triangle
13
15 (avg. 1.2)
7 (53.8%)
0 (0.0%)
Two Fer Two Fer
1,760
4,092 (avg. 2.3)
1,126 (64.0%)
346 (19.7%)
Prime Factors Prime Factors
13
8 (avg. 0.6)
6 (46.2%)
0 (0.0%)
Protein Translation Protein Translation
14
24 (avg. 1.7)
6 (42.9%)
0 (0.0%)
Secret Handshake Secret Handshake
9
12 (avg. 1.3)
4 (44.4%)
0 (0.0%)
Series Series
12
11 (avg. 0.9)
6 (50.0%)
0 (0.0%)
Sieve Sieve
13
6 (avg. 0.5)
4 (30.8%)
0 (0.0%)
Diamond Diamond
10
12 (avg. 1.2)
5 (50.0%)
0 (0.0%)
Largest Series Product Largest Series Product
13
12 (avg. 0.9)
6 (46.2%)
0 (0.0%)
Nth Prime Nth Prime
12
8 (avg. 0.7)
4 (33.3%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
9
12 (avg. 1.3)
4 (44.4%)
0 (0.0%)
Affine Cipher Affine Cipher
41
65 (avg. 1.6)
17 (41.5%)
1 (2.4%)
All Your Base All Your Base
71
164 (avg. 2.3)
42 (59.2%)
1 (1.4%)
Anagram Anagram
746
2,545 (avg. 3.4)
423 (56.7%)
92 (12.3%)
Atbash Cipher Atbash Cipher
156
251 (avg. 1.6)
107 (68.6%)
6 (3.8%)
Crypto Square Crypto Square
111
210 (avg. 1.9)
70 (63.1%)
1 (0.9%)
ETL ETL
165
254 (avg. 1.5)
109 (66.1%)
3 (1.8%)
Flatten Array Flatten Array
47
74 (avg. 1.6)
27 (57.4%)
0 (0.0%)
Conway's Game of Life Conway's Game of Life
13
9 (avg. 0.7)
4 (30.8%)
0 (0.0%)
Luhn Luhn
128
232 (avg. 1.8)
80 (62.5%)
4 (3.1%)
Minesweeper Minesweeper
12
3 (avg. 0.3)
3 (25.0%)
0 (0.0%)
Nucleotide Count Nucleotide Count
159
274 (avg. 1.7)
111 (69.8%)
8 (5.0%)
Pythagorean Triplet Pythagorean Triplet
13
24 (avg. 1.8)
3 (23.1%)
0 (0.0%)
Rail Fence Cipher Rail Fence Cipher
35
36 (avg. 1.0)
12 (34.3%)
0 (0.0%)
Robot Name Robot Name
194
335 (avg. 1.7)
127 (65.5%)
12 (6.2%)
Run-Length Encoding Run-Length Encoding
128
221 (avg. 1.7)
82 (64.1%)
2 (1.6%)
Spiral Matrix Spiral Matrix
9
9 (avg. 1.0)
3 (33.3%)
0 (0.0%)
Word Count Word Count
242
678 (avg. 2.8)
159 (65.7%)
26 (10.7%)
Isbn Verifier Isbn Verifier
12
8 (avg. 0.7)
4 (33.3%)
0 (0.0%)
Satellite Satellite
9
18 (avg. 2.0)
3 (33.3%)
0 (0.0%)
Knapsack Knapsack
10
3 (avg. 0.3)
2 (20.0%)
0 (0.0%)
Pig Latin Pig Latin
8
6 (avg. 0.8)
2 (25.0%)
0 (0.0%)
Food Chain Food Chain
8
9 (avg. 1.1)
2 (25.0%)
0 (0.0%)
Circular Buffer Circular Buffer
9
17 (avg. 1.9)
3 (33.3%)
0 (0.0%)
Bank Account Bank Account
7
4 (avg. 0.6)
1 (14.3%)
0 (0.0%)
Yacht Yacht
9
8 (avg. 0.9)
3 (33.3%)
0 (0.0%)
Accumulate Accumulate
11
8 (avg. 0.7)
6 (54.5%)
0 (0.0%)
Grade School Grade School
9
4 (avg. 0.4)
2 (22.2%)
0 (0.0%)
Meetup Meetup
8
5 (avg. 0.6)
2 (25.0%)
0 (0.0%)
Two Bucket Two Bucket
7
2 (avg. 0.3)
1 (14.3%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
8
12 (avg. 1.5)
1 (12.5%)
0 (0.0%)
Strain Strain
8
5 (avg. 0.6)
2 (25.0%)
0 (0.0%)
Proverb Proverb
8
5 (avg. 0.6)
2 (25.0%)
0 (0.0%)
Say Say
8
4 (avg. 0.5)
2 (25.0%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
8
39 (avg. 4.9)
1 (12.5%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
8
22 (avg. 2.8)
2 (25.0%)
0 (0.0%)
Linked List Linked List
8
4 (avg. 0.5)
2 (25.0%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
10
53 (avg. 5.3)
6 (60.0%)
0 (0.0%)
2 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Binary Binary
164
250 (avg. 1.5)
135 (82.3%)
6 (3.7%)
Trinary Trinary
117
186 (avg. 1.6)
89 (76.1%)
0 (0.0%)
45 unimplemented practice exercises
Alphametics Alphametics
View dataThe link opens in a new window or tab
Binary Search Tree Binary Search Tree
View dataThe link opens in a new window or tab
Book Store Book Store
View dataThe link opens in a new window or tab
Bottle Song Bottle Song
View dataThe link opens in a new window or tab
Bowling Bowling
View dataThe link opens in a new window or tab
Change Change
View dataThe link opens in a new window or tab
Clock Clock
View dataThe link opens in a new window or tab
Complex Numbers Complex Numbers
View dataThe link opens in a new window or tab
Connect Connect
View dataThe link opens in a new window or tab
Custom Set Custom Set
View dataThe link opens in a new window or tab
Dominoes Dominoes
View dataThe link opens in a new window or tab
DOT DSL DOT DSL
View dataThe link opens in a new window or tab
Error Handling Error Handling
View dataThe link opens in a new window or tab
Forth Forth
View dataThe link opens in a new window or tab
Go Counting Go Counting
View dataThe link opens in a new window or tab
Grep Grep
View dataThe link opens in a new window or tab
Hangman Hangman
View dataThe link opens in a new window or tab
High Scores High Scores
View dataThe link opens in a new window or tab
House House
View dataThe link opens in a new window or tab
Killer Sudoku Helper Killer Sudoku Helper
View dataThe link opens in a new window or tab
Ledger Ledger
View dataThe link opens in a new window or tab
Lens Person Lens Person
View dataThe link opens in a new window or tab
Markdown Markdown
View dataThe link opens in a new window or tab
Matrix Matrix
View dataThe link opens in a new window or tab
Micro Blog Micro Blog
View dataThe link opens in a new window or tab
OCR Numbers OCR Numbers
View dataThe link opens in a new window or tab
PaaS I/O PaaS I/O
View dataThe link opens in a new window or tab
Palindrome Products Palindrome Products
View dataThe link opens in a new window or tab
Poker Poker
View dataThe link opens in a new window or tab
POV POV
View dataThe link opens in a new window or tab
Rational Numbers Rational Numbers
View dataThe link opens in a new window or tab
React React
View dataThe link opens in a new window or tab
Rectangles Rectangles
View dataThe link opens in a new window or tab
REST API REST API
View dataThe link opens in a new window or tab
Saddle Points Saddle Points
View dataThe link opens in a new window or tab
SGF Parsing SGF Parsing
View dataThe link opens in a new window or tab
Simple Linked List Simple Linked List
View dataThe link opens in a new window or tab
State of Tic-Tac-Toe State of Tic-Tac-Toe
View dataThe link opens in a new window or tab
Tournament Tournament
View dataThe link opens in a new window or tab
Transpose Transpose
View dataThe link opens in a new window or tab
Tree Building Tree Building
View dataThe link opens in a new window or tab
Twelve Days Twelve Days
View dataThe link opens in a new window or tab
Word Search Word Search
View dataThe link opens in a new window or tab
Wordy Wordy
View dataThe link opens in a new window or tab
Zipper Zipper
View dataThe link opens in a new window or tab

Programming Tags

Learn More

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: 7a454761181f68eaf6dd181b7ff02ae8aef9419b (Takes up to 10 mins to deploy)

Total Test Runner Runs
24,435
Test Run Pass Rate
43.8% (10694)
Test Run Fail Rate
26.1% (6378)
Test Run Error Rate
30.1% (7363)

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 Emacs Lisp: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.