Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
The Book Nerd's Guide to JavaScript
Search
Angus Croll
November 17, 2014
Technology
14
4.2k
The Book Nerd's Guide to JavaScript
Given at DotJS, Paris on 17th November 2014
Angus Croll
November 17, 2014
Tweet
Share
More Decks by Angus Croll
See All by Angus Croll
Stop being Perfect
anguscroll
11
1.5k
ES6 Uncensored
anguscroll
72
12k
Learning to Fly — Twitter Flight and Mixins
anguscroll
23
4.5k
JavaScript is Literature is JavaScript
anguscroll
21
3.4k
The Politics of JavaScript
anguscroll
122
23k
Parlez-Vous JavaScript
anguscroll
33
6.3k
Break all the Rulez
anguscroll
42
15k
How we Learned to Stop Worrying and Love JavaScript
anguscroll
90
21k
Other Decks in Technology
See All in Technology
ISUCONにPHPで挑み続けてできるようになっ(てき)たこと / phperkaigi2025
blue_goheimochi
0
140
モンテカルロ木探索のパフォーマンスを予測する Kaggleコンペ解説 〜生成AIによる未知のゲーム生成〜
rist
4
1.1k
SaaSプロダクト開発におけるバグの早期検出のためのAcceptance testの取り組み
kworkdev
PRO
0
470
スケールアップ企業のQA組織のバリューを最大限に引き出すための取り組み
tarappo
4
960
20250326_管理ツールの権限管理で改善したこと
sasata299
1
430
AIエージェント完全に理解した
segavvy
4
290
小さく始めるDevOps 内製化支援から見えたDevOpsの始め方 / 20250317 Ken Takayanagi
shift_evolve
1
110
年末調整プロダクトの内部品質改善活動について
kaomi_wombat
0
210
Road to SRE NEXT@仙台 IVRyの組織の形とSLO運用の現状
abnoumaru
0
410
Symfony in 2025: Scaling to 0
fabpot
2
220
開発現場とセキュリティ担当をつなぐ脅威モデリング
cloudace
0
110
問題解決に役立つ数理工学
recruitengineers
PRO
8
2.3k
Featured
See All Featured
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
177
52k
Practical Orchestrator
shlominoach
186
10k
Building Flexible Design Systems
yeseniaperezcruz
328
38k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
12
1.4k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
4
480
Agile that works and the tools we love
rasmusluckow
328
21k
The Power of CSS Pseudo Elements
geoffreycrofte
75
5.7k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
17
1.1k
Typedesign – Prime Four
hannesfritz
41
2.6k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
12
620
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
160
15k
A better future with KSS
kneath
238
17k
Transcript
A Book Nerd’s Guide to JavaScript @angustweets
None
Practical, Useful, Mind Numbingly Boring Nonsensical Work of Genius
What can Literature teach us about Programming?
Great literature is the creation of open minds As programmers
our focus can be very narrow
We’re encouraged to follow only one style…
Actual excerpts from: Google Style Guide AirBnb Style Guide JavaScript
Garden
None
None
We’re left with only one way to get from A
to B :(
None
None
Literature is about embracing the entire language
When programmers embrace the entire language we get choices…
None
None
"There are indeed many ways to do the same thing
in JS. That's one of the beauties of the language" - Peter van der Zee (@kuvos)
None
None
(at least until the JavaScript Police get here)
None
None
Perhaps most importantly…
…Open Minds keep JavaScript fun.
This one just follows The Good Parts These two learn
by experiment
As programmers we’re not encouraged to experiment
Yet experiment is what keeps JavaScript alive
“You need a lot of bad code to write good
code” - Substack (dotJS 2014)
‣ if(!!x) ‣ fn && fn() ‣ immediately invoked functions
‣ module pattern ‣ promises
None
I decided to take experiment to the next level…
None
Wait What?
Twenty Five Authors solving Five JavaScript Problems
Hemingway developed the Iceberg Theory
Here is Hemingway’s Iceberg Theory applied to JavaScript…
(weird shit) (Deceptively Familiar Syntax) (weird shit) JavaScript
(weird shit) JAVA!! (Deceptively Familiar Syntax) (weird shit) JavaScript
(weird shit) JAVA!! But Easier!! (Deceptively Familiar Syntax) (weird shit)
JavaScript
(weird shit) JAVA!! But Easier!! (Deceptively Familiar Syntax) (weird shit)
WTF? JavaScript
Generate Prime Numbers
None
// A succession of creatures mount the stairs;! // each
creature's stride exceeds that of its predecessor! var monstersAscendingAStaircase = function(numberOfSteps) {! var stairs = []; stepsUntrodden = [];! var largestGait = Math.sqrt(numberOfSteps);! for (var i = 2; i <= largestGait; i++) {! if (!stairs[i]) {! for (var j = i * i; j <= numberOfSteps; j += i) {! stairs[j] = 'stomp';! }! }! }! ! // Long-limbed monsters won't tread on prime numbered stairs.! for (var i = 2; i <= numberOfSteps; i++) {! if(!stairs[i]) {! stepsUntrodden.push(i);! }! }! ! // Here, then, is our answer.! return stepsUntrodden;! };!
1 2 3 4 5 6 7 8 9 10
11 12 13 14 2 3 Borges vs. Prime Numbers
None
function downTheRabbitHole(growThisBig) {! var theFullDeck = Array(growThisBig);! var theHatter =
Function('return this/4').call(2*2);! var theMarchHare = Boolean("The frumious Bandersnatch!");! ! var theVerdict = "the white rabbit".split(/the march hare/).slice(theHatter);! ! //into the pool of tears...! eval(theFullDeck.join("if (!theFullDeck[++theHatter]) {\! theMarchHare = 1;\! theVerdict.push(theHatter);\! " + theFullDeck.join("theFullDeck[++theMarchHare * theHatter]=true;") + "}")! );! ! return theVerdict;! }!
function downTheRabbitHole(growThisBig) {! var theFullDeck = Array(growThisBig);! var theHatter =
Function('return this/4').call(2*2);! var theMarchHare = Boolean("The frumious Bandersnatch!");! ! var theVerdict = "the white rabbit".split(/the march hare/).slice(theHatter);! ! //into the pool of tears...! eval(theFullDeck.join("if (!theFullDeck[++theHatter]) {\! theMarchHare = 1;\! theVerdict.push(theHatter);\! " + theFullDeck.join("theFullDeck[++theMarchHare * theHatter]=true;") + "}")! );! ! return theVerdict;! }!
function downTheRabbitHole(growThisBig) {! var theFullDeck = Array(growThisBig);! var theHatter =
Function('return this/4').call(2*2);! var theMarchHare = Boolean("The frumious Bandersnatch!");! ! var theVerdict = "the white rabbit".split(/the march hare/).slice(theHatter);! ! //into the pool of tears...! eval(theFullDeck.join("if (!theFullDeck[++theHatter]) {\! theMarchHare = 1;\! theVerdict.push(theHatter);\! " + theFullDeck.join("theFullDeck[++theMarchHare * theHatter]=true;") + "}")! );! ! return theVerdict;! }!
! new Array(5).join('A' + new Array(5).join('a'));! ! >! !
new Array(5).join("A" + new Array(5).join('a'));! ! > "AaaaaAaaaaAaaaaAaaaa"!
function downTheRabbitHole(growThisBig) {! var theFullDeck = Array(growThisBig);! var theHatter =
Function('return this/4').call(2*2);! var theMarchHare = Boolean("The frumious Bandersnatch!");! ! var theVerdict = "the white rabbit".split(/the march hare/).slice(theHatter);! ! //into the pool of tears...! eval(theFullDeck.join("if (!theFullDeck[++theHatter]) {\! theMarchHare = 1;\! theVerdict.push(theHatter);\! " + theFullDeck.join("theFullDeck[++theMarchHare * theHatter]=true;") + "}")! );! ! return theVerdict;! }!
eval(“if(!theFullDeck[++theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}if(!theFullDeck[+ +theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}if(!theFullDeck[+ +theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+
+theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}if(!theFullDeck[+ +theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}if(!theFullDeck[+ +theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}if(!theFullDeck[+ +theHatter]){theMarchHare=1;theVerdict.push(theHatter);theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;theFullDeck[+ +theMarchHare*theHatter]=true;theFullDeck[++theMarchHare*theHatter]=true;}”);!
eval(“if (!theFullDeck[++theHatter]) {! theMarchHare = 1;! theVerdict.push(theHatter);! theFullDeck[++theMarchHare * theHatter]
= true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! }! if (!theFullDeck[++theHatter]) {! theMarchHare = 1;! theVerdict.push(theHatter);! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! theFullDeck[++theMarchHare * theHatter] = true;! }! if (!theFullDeck[++theHatter]) {! theMarchHare = 1;!
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
Alice in Prime Numberland
So what did we learn?
Playing is Learning
Self-taught programmers are often the best programmers because they get
to make mistakes
Experiment, Play, Have Fun and Keep an Open Mind.
Fin, merci! @angustweets anguscroll.com/hemingway
Books: http://pixgood.com/classic-book-spines.html/ Montparnasse Tower: http://allparisguides.com Eiffel Tower: Yellow Monster: http://content.mycutegraphics.com/
Green Monster: http://wondersofdisney2.yolasite.com/ White Rabbit: http://www.clker.com/ Mad Hatter, March Hare: http://wondersofdisney2.yolasite.com/ Cow, tree, office buildings: clipartpanda.com/ Grass: imgarcade.com/ Lion cubs: https://www.flickr.com/photos/mbiddulph/6947067048/ Cheetah cubs: http://www.bhmpics.com/view-cheetah_cubs_playing-1920x1080.html/ ! Image credits