-*- coding: utf-8 -*-


BartholomewJS
​Greetings, everyone.

Xah Lee
​hey B

BartholomewJS
​hey X

ZitronCrazy
​Hey Xah

abdo esam
​hello everyone

Xah Lee
​did finish funct prog yesterday

Xah Lee
​gonna add a topic of continue that

BartholomewJS
​Now?

Xah Lee
​mabe with concrete code, e.e. ja.

Xah Lee
​hi zitron

Xah Lee
​hi abdo

BartholomewJS
​Do you mean German "ja"? 😁

Xah Lee
​js.

Xah Lee
​lol, on a tablet now, cant type

BartholomewJS
​Filthy casuals only use tablets.

Xah Lee
​added topic 12

Xah Lee
​😀

Xah Lee
​brb in 5

BartholomewJS
​#12
Welcome to live chat! Remember to guard your privacy and abide by our community guidelines.

Web Dog
​hey Xah

Web Dog
​I abandoned Emacs and am a VS Code soyboy now

BartholomewJS
​Yes, good topic.

ZitronCrazy
​creepy clown face

Web Dog
​functional programming is for ppl who pretend to be good at math

Web Dog
​legit

 This message is held for review.

BartholomewJS
​Julia is a hot b tch

Seamus Slack
​howdy

Seamus Slack
​@Xah Lee functional programming JS great. I'll stick around.

Aaron Hall
​Python prof reporting for duty

Aaron Hall
​❤

Aaron Hall
​almost top

Aaron Hall
​Douglas?

Seamus Slack
​Hi @Aron Hall

Web Dog
​@Aaron Hall good on you man, it's good to be a top expert at one thing. wish I did that instead of learning 100 langs.

BartholomewJS
​You forgot an A there.

Aaron Hall
​I diversified my approach until I got hired, but then I went deep.

Aaron Hall
​Is arrow like a lambda?

Seamus Slack
​@Aaron Hall sorry I don't spell

Web Dog
​ya ES6 arrow functions are lambdas (anonymous functions) @Aaron Hall

Aaron Hall
​nice, I had forgotten. I need to learn JS more... Xah's page might teach me. 😀

Web Dog
​FP in JavaScript: `Just(5).bind(a => Just(10).bind(b => Just(a + b)))` [Implementation of Just left as an exercise to the reader]

Web Dog
​it's the Just monad

Aaron Hall
​Just(15)

Aaron Hall
​?

Web Dog
​yea

Web Dog
​Maybe monad

Web Dog
​Maybe x = Just x | None

abdo esam
​great!!

SpinalChamp
​Comment

BartholomewJS
​Comment2

 This message is held for review.

ZitronCrazy
​also a comment

Aaron Hall
​Meta question: why not use markdown?

BartholomewJS
​@Aaron Hall Don't trigger him.

Aaron Hall
​I think pandoc might become standard.

Seamus Slack
​Xah is very accomplished programmer, but he is a creature of his time.

BartholomewJS
​I personally don't like YAML, TOML and similar ones, at all. I got used to Markdown some time ago and since then pretty much use it 95% of my time writing stuff.

abdo esam
​handlebars is popular with node.js

abdo esam
​const f1 = y => y();

Moonbase Snails
​like this?

Moonbase Snails
​let f = (x) => (y) => { return x + y }

abdo esam
​ah got it, sorry i was trying 😀

Moonbase Snails
​which type of emacs for mac do you use?

Moonbase Snails
​oh nice me too!

Aaron Hall
​closure: when an inner function closes over the variables in an outer function's scope and can later use those variables even when not in the outer function's scope.

weeaboo champloo
​you're doing great xah. i just started watching and i thought you said "Clojure" was a programming feature and I was very confused

BartholomewJS
​@weeaboo champloo The whole time I have to think about this genius marketing trick made by Clojure.

BartholomewJS
​@Xah Lee What's a really common and USEFUL real world example for clojures and returning procs/funcs.

BartholomewJS
​?

Web Dog
​A closure is just state

Web Dog
​way to encapsulate state that lasts forever and doesn't get GC'd (lol)

Moonbase Snails
​good show

Aaron Hall
​keep the party going!

BartholomewJS
​I spelled it wrong, after all. Damn marketing geniuses.

BartholomewJS
​You used a function that returns a function within a closure, so I assumed it was useful when used together.

BartholomewJS
​@Xah Lee You used a function that returns a function within a closure, so I assumed it was useful when used together.

Thomas Wall
​Isn't it just a function and its connection to the surrounding scope's variables?

Web Dog
​yeah every class is kind of a closure

Aaron Hall
​I like closures and partial functions for callbacks.

BartholomewJS
​@Xah Lee Okay show me one of the most common and useful examples for returning a function with a function.

Aaron Hall
​in Python, when you're returning a lambda, it's usually a closure.

BartholomewJS
​I mean real world example. @Xah Lee

BartholomewJS
​Not x+1 = x+1 @Xah Lee

Web Dog
​In JS you can do currying a lot easier than you showed earlier:

Web Dog
​const add = (a, b) => a + b; const add_5 = add.bind(null, 5); add_5(5); // 10

Web Dog
​real world example of a map? fetch customers from a database and add $5 to each of their balances.

BartholomewJS
​@Web Dog That should be indeed a real world process.

BartholomewJS
​Goodbye

BartholomewJS
​Put money in his pocket to keep @Xah Lee alive.

Xah Lee
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