Emacs Lisp

3,840 students

36 contributors

3,840
students have developed their Emacs Lisp skills on Exercism.

Students

3,840

Submissions

19,530

Mentoring Discussions

932

The Emacs Lisp track needs attention ⚠️

Building

Build

Use your knowledge to build the Emacs Lisp track itself

36 contributors

Build Test Runners

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

Usage statistics

Total Test Runner Runs

16,469

Test Run Pass Rate

48.1% (7917)

Test Run Fail Rate

27.5% (4528)

Test Run Error Rate

24.4% (4024)

Build Analyzers

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.

Build Representers

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.

Create Practice Exercises

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.

Next goal: Implement at least 50 practice exercises. Find out more.

Usage statistics

40 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

2,552

3,464 (avg. 1.4)

1,986 (77.8%)

6 (0.2%)

Two Fer

1,490

3,220 (avg. 2.2)

948 (63.6%)

343 (23.0%)

Leap

801

1,832 (avg. 2.3)

621 (77.5%)

110 (13.7%)

Anagram

619

2,017 (avg. 3.3)

362 (58.5%)

89 (14.4%)

Roman Numerals

315

696 (avg. 2.2)

211 (67.0%)

48 (15.2%)

Hamming

341

697 (avg. 2.0)

283 (83.0%)

64 (18.8%)

RNA Transcription

252

520 (avg. 2.1)

209 (82.9%)

40 (15.9%)

Bob

481

1,177 (avg. 2.4)

341 (70.9%)

107 (22.2%)

Word Count

196

561 (avg. 2.9)

139 (70.9%)

26 (13.3%)

Acronym

155

320 (avg. 2.1)

125 (80.6%)

5 (3.2%)

Allergies

167

429 (avg. 2.6)

135 (80.8%)

6 (3.6%)

Armstrong Numbers

138

214 (avg. 1.6)

111 (80.4%)

2 (1.4%)

All Your Base

33

81 (avg. 2.5)

23 (69.7%)

1 (3.0%)

Difference of Squares

357

474 (avg. 1.3)

298 (83.5%)

17 (4.8%)

ETL

133

205 (avg. 1.5)

95 (71.4%)

3 (2.3%)

Gigasecond

264

540 (avg. 2.0)

179 (67.8%)

10 (3.8%)

Grains

128

284 (avg. 2.2)

101 (78.9%)

5 (3.9%)

Nucleotide Count

121

208 (avg. 1.7)

95 (78.5%)

6 (5.0%)

Pangram

176

270 (avg. 1.5)

132 (75.0%)

8 (4.5%)

Perfect Numbers

113

227 (avg. 2.0)

87 (77.0%)

1 (0.9%)

Raindrops

133

202 (avg. 1.5)

108 (81.2%)

6 (4.5%)

Trinary

93

142 (avg. 1.5)

73 (78.5%)

0 (0.0%)

Atbash Cipher

125

201 (avg. 1.6)

95 (76.0%)

6 (4.8%)

Crypto Square

82

143 (avg. 1.7)

59 (72.0%)

1 (1.2%)

Phone Number

103

152 (avg. 1.5)

76 (73.8%)

2 (1.9%)

Robot Name

161

290 (avg. 1.8)

114 (70.8%)

12 (7.5%)

Run-Length Encoding

99

186 (avg. 1.9)

71 (71.7%)

2 (2.0%)

Luhn

92

185 (avg. 2.0)

62 (67.4%)

3 (3.3%)

List Ops

33

133 (avg. 4.0)

20 (60.6%)

1 (3.0%)

Sublist

24

57 (avg. 2.4)

14 (58.3%)

0 (0.0%)

Darts

10

22 (avg. 2.2)

9 (90.0%)

1 (10.0%)

Rotational Cipher

7

11 (avg. 1.6)

6 (85.7%)

0 (0.0%)

Simple Cipher

6

7 (avg. 1.2)

5 (83.3%)

0 (0.0%)

Affine Cipher

6

4 (avg. 0.7)

3 (50.0%)

0 (0.0%)

Rail Fence Cipher

5

2 (avg. 0.4)

2 (40.0%)

0 (0.0%)

Matching Brackets

18

59 (avg. 3.3)

12 (66.7%)

2 (11.1%)

Queen Attack

8

8 (avg. 1.0)

5 (62.5%)

0 (0.0%)

Reverse String

12

21 (avg. 1.8)

11 (91.7%)

1 (8.3%)

Binary Search

8

5 (avg. 0.6)

4 (50.0%)

0 (0.0%)

Flatten Array

10

14 (avg. 1.4)

8 (80.0%)

0 (0.0%)

1 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Binary

164

250 (avg. 1.5)

135 (82.3%)

6 (3.7%)

89 unimplemented practice exercises

Alphametics

Bank Account

Binary Search Tree

Book Store

Bottle Song

Bowling

Change

Circular Buffer

Clock

Collatz Conjecture

Complex Numbers

Connect

Custom Set

D&D Character

DOT DSL

Diamond

Dominoes

Error Handling

Food Chain

Forth

Go Counting

Grade School

Grep

Hangman

High Scores

House

ISBN Verifier

Isogram

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Largest Series Product

Ledger

Lens Person

Linked List

Markdown

Matrix

Meetup

Micro Blog

Minesweeper

Nth Prime

OCR Numbers

POV

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Pascal's Triangle

Pig Latin

Poker

Prime Factors

Protein Translation

Proverb

Pythagorean Triplet

REST API

Rational Numbers

React

Rectangles

Resistor Color

Resistor Color Duo

Resistor Color Trio

Robot Simulator

SGF Parsing

Saddle Points

Satellite

Say

Scale Generator

Scrabble Score

Secret Handshake

Series

Sieve

Simple Linked List

Space Age

Spiral Matrix

Square Root

State of Tic-Tac-Toe

Strain

Sum of Multiples

Tournament

Transpose

Tree Building

Triangle

Twelve Days

Two Bucket

Variable Length Quantity

Word Search

Wordy

Yacht

Zebra Puzzle

Zipper

Volunteers

67

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1,168

maurelio1234

825

yilkalargaw

797

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