Jozi.JS 2018, 30 Jun 2020

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From YouTube: How to Ram Da functional into your JavaScript - Kevin Heritage and Luke Warren

Description

Goat powered functional javascript. When js is not enough you add a goat, a male goat, called Ramda. He will help you create some real schwifty reusable stellar looking code.

This talk was recorded at the Jozi.JS meetup group on the 19 April 2018.

https://www.meetup.com/Jozi-JS/events/246960071/

Disclaimer: The opinions in this talk are those of the individual and do not necessarily represent those of this channel, the meetup group, or it’s sponsors.

A

Okay, Kasich I said Luke Warren killing here. Is it my well so we're gonna talk about a bit of the basics of getting sucker-punched programming in JavaScript library last get sued.

A

But start out: let's talk quite a bit of basics, so the first thing is first class citizens and.

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Variables to functions functions around those parameters. You know you can return functions. We.

B

Talked about they're, just not.

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Okay and the next idea is this: this idea of purity and curve and as a given input, which returns the same awkward little mutates. What's positive,.

C

So returning functions are, we've got carrying, which is a fundamental part of functional programming. Where you return a function to creates more specific benefits. This can also be used to create scope in certain places. We could pass data to a function to later then use that function that has that scope somewhere else. We might not have that data. Rounded Rama is a very handy, curried function which we'll be covering.

C

But there's a block called the age of any object, not just necessarily goes, which is a generic age. Proper function.

A

Okay, that's the basics. We really need my little friend.

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Footprint or it's all kids, whose functional program, so it's what about creating functional parts, lists.

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Most of the time.

B

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Basically, all your basic items that you have in normal JavaScript, your Maps data for each is vines filters. Whatever you want to put the purposes of this data.

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C

Good to the good food, we inquire on that function. They my library, which is quiet, that this was easier. You don't have our thoughts function listed for your code, be more specific as far as I know. It helps with the tree shavings here using the things that you max Keeble. You have things in your code that you actually either than a knee to the back of the court on that function, face the same, go to student question and makes it a positive and can also separate your data from your logic logic from your data.

C

Then you can possibly good later stage and use the same. Some previous up.

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The other side- oh, it's, also really really simple. You just pretty much.

C

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Which is the same sort of package apart.

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Everything in Ranma, which is fun even when there's currently so.

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Now we were no specific function and those are mine. Addicts really awesome equals a dysfunctional Jomon function, but a more specific firefighters are my you know headaches. So it's this composition is holding at a very specific.

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C

Then we get to the nitty-gritty of debugging grando, because then that's can be difficult, written all this, this lovely code- that is point three you've got all these nice functions. Will you put your breakpoints down it's very difficult to quite a place to inspect your the function so sometimes, when you break the point freeness our code in order to inspect something. So this is a simple example of grading. The point three way.

C

And they just function the result in return, remember to return this opportunity and you'll be searching for a while to figure out what the hell. Thank you. This sucks is not very maintainable.

C

C

In this function and then returns a new function for the data and they do the same thing, this is better, but it's still difficult to remove one of these functions. So the way I prefer to be my debugging is mine, and this brother makes the basic and take that approach.

C

Where do you want to talk with what you wanted to happen? Hey Dex, you showed me this function. This is better because you just like leave it up to one console the plot that you have well. We can just kill the lines which are pretty simple to you.

A

It's get a bit fancy so currently introducing you do not say this is the wizbam feature, and this is one thing, because we don't want to speak for two hours of manda. This is all apostates is defined, a specification for how to create all of you. So this is repeating it over state. Most of big codes.

A

But on the right is always a function. Okay, no policy object with an attribute is punched in it. Thank you. One. Last name of use wing there so you'll see Jason parameter whatever grabbed remnants of shoe posture plus baby. As the final arguments will be here, each function and the venue state to that property to reduce any vote on the entire object. Creative 2x use, it's super powerful and it's not some people way to create.

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This can really bite you if you just want to string.

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We just talk to a string, it would freak out to go to a fantasy land of wonder and it literally will say fantasy.

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C

So you just always with whatever you wanted to always return yeah and whatever arguments it gets. It'll always return that same argument. At the first time, it's.

B

Not actually trying to call the spring what it's doing is if the right hand side is an object, then it tries to find functions on that object, so it will recursively keep going at infinitum and you'll get. A second is no find the terminal function.

B

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Right now get to one of my favorite functions and that is the actual ramp carry function. This function has a list of arguments and it'll carry that once before you.

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Super super, possibly the good moving in water. The same fact they say lost both augments to it. I know, execute ones will walking itself in Wall Street, so they sign it need to give them. One parameter opened you back: let's give it another parameter and so forth.

A

Cool site just like in closing it's a chain, don't stop, leaving.

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Of function, wrapping unnecessary function, wrapping do this, and then it makes you find out. You don't have to wrap your functions in a function because it's returning a function just unnecessary wrapping, so you can start off that way and do it that way and then eventually you'll see that you don't always have to wrap your functions in other languages. It's really a big mindset just because now you're, not thinking in terms of I've got. This big may stood for apparently breaking it up into small little functions.

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That will eventually come together to solve the bigger problem, to be greatly the problem down into smaller chunks to digest, and then they all come together to solve the problem.

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So here's a few links that we've found how people where's the slides, I post, the link to the slides, we'll post the slides of the talk tonight. Most important thing of all is the bottom line. Grab the chairs dogs, those blocking the documentation or grandma, is pretty darn good. It's got a ripple that you can just go to type in and hack away in the actual site, and it's just great.