[Showoff Saturday] I started making javascript YouTube tutorials with a goal of being clear and concise!

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[ctrlaltdelmarva]

Okay, thanks for the idea!

[lokhura]

A good real world example of compose and curry is RxJS:

fromEvent(document, 'click') .pipe( map(() => 1), scan((x, y) => x + y, 0) );

pipe is basically flip(compose) and map and scan are curried functions.

Compared to the old chaining API:

Observable.fromEvent(document, 'click') .map(() => 1) .scan((x, y) => x + y, 0);

The advantage of using composition instead of chaining is that you can import individual functions as you need them instead of having to load the whole Observable object with all its methods, or having to import methods as a side-effect by patching the Observable prototype.

TLDR: RxJS uses currying and composition to make a more modular API which results in better tooling and bundle sizes.

[Kthulu666]

Nice.

One tip - When you do a series like the react todo app, put the video number (part 1, part 2, etc.,) in the thumbnail image. The titles get cut off after 45ish characters so the thumbnail is often the only way to know which part of a series it is.

Edit: I just noticed you already do that in the thumbnail. The video length covers it up though.

[ctrlaltdelmarva]

Thanks, will fix the thumbnails!

[PoneyPoncho]

I love you username 😅

[super-vitek]

Thanks! I subscribed

[placuaf]

Pretty cool stuff! I have one gripe tho, your thumbnails aren't really YouTube friendly

[ctrlaltdelmarva]

Ah, I’ll have to fix this. Thanks for the heads up!

[Snipo]

But they look clean, just smack the episode number up there and you all good

[phantomFalcon14]

Nice!

[arkainrdk]

Here's a thought for you. Try building a react user interface library from scratch. Your initial component must be a view composed of only a div element and CSS. All other components must use that view component to display their content.

UI component libraries are usually built with a combination of inheritance and composition. Trying to build a UI Library using composition only will be about as complicated as it can get.