cyclejs/cyclejs

A functional and reactive JavaScript framework for predictable code. cycle.js.org

Akaan Qualrus

@akaan

This works but the component is difficult to test because I need to craft a suitable DragEvent with a file attached to it outside the browser (maybe with jsdom ?).

I wonder if the file reading should be seen as a side effect and moved to a driver. That would be a driver taking a Stream<DragEvent> or a Stream<File> as sink and output a Stream<string> as source ?

Paul Snively

@paul-snively

@akaan: I think the driver impulse is a good one. That is generally the context in which Cycle.js expects effects to happen.

@akaan: As you've surmised, part of the point is the inversion of control it has with respect to run. So testing is easier, e.g. mocking is easier (or unnecessary).

@akaan: That said, there's new development in Cycle.js aiming to simplify the driver concept even more, partly so as to reduce the need to mock even further.

@akaan: (They're reinventing monads... shhhhhhhh!) ;-)

Jan van Brügge

@jvanbruegge

streams are already monads (empty() is return and map().flatten() is bind), the addition now are basically "pure" monads that are interpreted in terms of streams (like StateT in Haskell)

aka nicer interfaces for e.g. HTTP

Paul Snively

@paul-snively

Yes, Stream clearly is. I'm thinking of drivers.

PEZO

@ZoliPeto_twitter

@paul-snively could you please elaborate on that driver/monad idea and/or give me some references to read more about ?

Akaan Qualrus

@akaan

Monadic programming style in Cycle.js ? I will look into it !

Jan van Brügge

@jvanbruegge

we were talking about this I am currently working on: cyclejs/cyclejs#929

it will allow to change this:

Jan van Brügge

@jvanbruegge

function main(sources) {
    const res$ = sources.HTTP.select("manIhateNamingThings").flatten();

    return {
        DOM: res$.map(view).startWith("loading"),
        HTTP: xs.of({
            url: "/wherever",
            method: "GET",
            category: "manIhateNamingThings"
        })
    };
}

into the more readable

function main(sources) {
    return {
        DOM: sources.HTTP.get("/whatever")
            .map(view)
            .startWith("loading")
    };
}

Internally, the same happens as in the first piece of code, because HTTP.get is interpreted as a request and a response stream

PEZO

@ZoliPeto_twitter

Thanks for the example!

Jan van Brügge

@jvanbruegge

That also means that you don't need MockXXXSource any more, because the sources are pure and the drivers just take and return a normal stream

@cycle/run and @cycle/http are pretty much done already, I just need to port over the last few missing tests: cyclejs/cyclejs#930

At least I think the code is quite readable

definitely better than the current run

siassaj

@siassaj

@jvanbruegge plan's been set mang

my mrs has applied to council to start work on a house to build in estonia

i'm gonna be running round eu eating pork & mayonnaise very soon

what's the go with > $100eu /hr gigs

they exist eh?

Jan van Brügge

@jvanbruegge

maybe? i havent done consulting for some time, have been quite busy

PEZO

@ZoliPeto_twitter

@jvanbruegge May I ask where are you currently working at / what are you working on?

Jan van Brügge

@jvanbruegge

I work part time for Futuricrle to cover rent and other expenses (simple steady job without fluctuations in income) and doing my master's degree

(aside from working on cycle and haskell)

*Futurice

PEZO

@ZoliPeto_twitter

Thanks! Are you using cycle at futurice or in your masters?

siassaj

@siassaj

I did a masters once

Jan van Brügge

@jvanbruegge

i did a seminar once where i presented Cycle, but that was pretty much the only time in university

myself did not use cycle within futurice yet, but I also did not really do any frontend work yet, at the moment for example I am working on a backend in Haskell

PEZO

@ZoliPeto_twitter

Thank you!

Jan van Brügge

@jvanbruegge

but i know there were projects that used Cycle

PEZO

@ZoliPeto_twitter

Are you aware of any (paid) Cycle project I could join to as a remote dev?

Jan van Brügge

@jvanbruegge

no, not at the moment

PEZO

@ZoliPeto_twitter

Thanks

André Staltz

@staltz

Hey y'all, I'm looking for a frontend developer to work with me on an existing Cycle.js / RxJS web app currently serving thousands of users and customers. Well-paying contract work, remotely. 👌

Email me to start a conversation. Show me your GitHub or GitLab or other portfolio. I'll send an interview exercise

cc @ZoliPeto_twitter

PEZO

@ZoliPeto_twitter

@staltz I will do that asap! Thank you for mentioning!

PEZO

@ZoliPeto_twitter

@staltz just sent you the email

siassaj

@siassaj

Is it weird that I don't have a portfolio

but work as a tech lead

André Staltz

@staltz

Not too weird :)

siassaj

@siassaj

at some point i need to reduce my responsibilities here and start taking some work in europe

im the best goddamn techlead you ever done seen i'll get eu work ez

Piotr Brzeziński

@brzezinskip

Hey :wave: its been a year or so since last time I played with cycle. Till then I improved my FP skills a lot so I think I'll be able to give it another shot now without struggling as much as I did :)

Jan van Brügge

@jvanbruegge

I wrote a blog article about the new design for the Cycle.js rewrite: https://dev.to/jvanbruegge/redesigning-a-framework-daa

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