Emacs Lisp

3,984 students

About Emacs Lisp

37 contributors

3,984
students have developed their Emacs Lisp skills on Exercism.

Students

3,984

Submissions

21,298

Mentoring Discussions

937

The Emacs Lisp track needs attention ⚠️

Building

Build

Use your knowledge to build the Emacs Lisp track itself

37 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

18,231

Test Run Pass Rate

47.1% (8580)

Test Run Fail Rate

27.3% (4979)

Test Run Error Rate

25.6% (4672)

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

2,687

3,661 (avg. 1.4)

2,101 (78.2%)

6 (0.2%)

Two Fer

1,570

3,504 (avg. 2.2)

999 (63.6%)

343 (21.8%)

Leap

845

1,964 (avg. 2.3)

652 (77.2%)

111 (13.1%)

Anagram

648

2,171 (avg. 3.4)

379 (58.5%)

89 (13.7%)

Roman Numerals

335

783 (avg. 2.3)

225 (67.2%)

48 (14.3%)

Hamming

362

775 (avg. 2.1)

299 (82.6%)

65 (18.0%)

RNA Transcription

271

558 (avg. 2.1)

224 (82.7%)

40 (14.8%)

Bob

502

1,271 (avg. 2.5)

354 (70.5%)

108 (21.5%)

Word Count

214

602 (avg. 2.8)

147 (68.7%)

26 (12.1%)

Acronym

170

368 (avg. 2.2)

135 (79.4%)

5 (2.9%)

Allergies

178

450 (avg. 2.5)

142 (79.8%)

6 (3.4%)

Armstrong Numbers

151

230 (avg. 1.5)

119 (78.8%)

2 (1.3%)

All Your Base

44

111 (avg. 2.5)

29 (65.9%)

1 (2.3%)

Difference of Squares

367

494 (avg. 1.3)

306 (83.4%)

17 (4.6%)

ETL

143

231 (avg. 1.6)

101 (70.6%)

3 (2.1%)

Gigasecond

274

555 (avg. 2.0)

185 (67.5%)

10 (3.6%)

Grains

137

291 (avg. 2.1)

106 (77.4%)

5 (3.6%)

Nucleotide Count

131

223 (avg. 1.7)

100 (76.3%)

7 (5.3%)

Pangram

187

285 (avg. 1.5)

139 (74.3%)

8 (4.3%)

Perfect Numbers

122

271 (avg. 2.2)

93 (76.2%)

1 (0.8%)

Raindrops

143

222 (avg. 1.6)

115 (80.4%)

6 (4.2%)

Trinary

104

161 (avg. 1.5)

80 (76.9%)

0 (0.0%)

Atbash Cipher

133

218 (avg. 1.6)

100 (75.2%)

6 (4.5%)

Crypto Square

91

182 (avg. 2.0)

64 (70.3%)

1 (1.1%)

Phone Number

110

166 (avg. 1.5)

81 (73.6%)

2 (1.8%)

Robot Name

170

307 (avg. 1.8)

120 (70.6%)

12 (7.1%)

Run-Length Encoding

107

205 (avg. 1.9)

76 (71.0%)

2 (1.9%)

Luhn

100

199 (avg. 2.0)

67 (67.0%)

3 (3.0%)

List Ops

43

142 (avg. 3.3)

26 (60.5%)

1 (2.3%)

Sublist

34

77 (avg. 2.3)

21 (61.8%)

0 (0.0%)

Darts

22

37 (avg. 1.7)

17 (77.3%)

1 (4.5%)

Rotational Cipher

18

37 (avg. 2.1)

13 (72.2%)

0 (0.0%)

Simple Cipher

17

28 (avg. 1.6)

12 (70.6%)

0 (0.0%)

Affine Cipher

13

17 (avg. 1.3)

5 (38.5%)

0 (0.0%)

Rail Fence Cipher

11

16 (avg. 1.5)

4 (36.4%)

0 (0.0%)

Matching Brackets

29

118 (avg. 4.1)

20 (69.0%)

2 (6.9%)

Queen Attack

16

22 (avg. 1.4)

10 (62.5%)

0 (0.0%)

Reverse String

24

38 (avg. 1.6)

19 (79.2%)

1 (4.2%)

Binary Search

16

30 (avg. 1.9)

9 (56.3%)

0 (0.0%)

Flatten Array

18

28 (avg. 1.6)

12 (66.7%)

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

fap

1,168

maurelio1234

825

ErikSchierboom

799

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