Dillon Mulroy λ @dillon_mulroy Twitter profile

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Dillon Mulroy λ

@dillon_mulroy

5 months

ThePrimeagen

@ThePrimeagen

5 months

real talk, dillon really is one of the most talented engineers to follow on twitter do it follow him now

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Last Seen Profiles

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Dillon Mulroy λ

@dillon_mulroy

9 months

this is what peak software engineering looks like, i dont make the rules

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Dillon Mulroy λ

@dillon_mulroy

4 months

accidentally rolled my own auth again

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Dillon Mulroy λ

@dillon_mulroy

2 months

The book that cost the world more than null

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Dillon Mulroy λ

@dillon_mulroy

3 months

legend

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Dillon Mulroy λ

@dillon_mulroy

1 year

Better TypeScript error handling in 54 lines

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Dillon Mulroy λ

@dillon_mulroy

2 months

.then and .catch are a better api than async/await with try/catch and you can't change my mind

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Dillon Mulroy λ

@dillon_mulroy

10 days

this is what happens when you keep your engineers out of pointless meetings and give them trust and autonomy. they ship.

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Dillon Mulroy λ

@dillon_mulroy

6 months

eslint

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Dillon Mulroy λ

@dillon_mulroy

8 months

First day ▲

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Dillon Mulroy λ

@dillon_mulroy

2 months

If I had any wisdom to teach younger devs it would be this: 1. Program against, consider, and handle the error path first and foremost. Include useful logging, telemetry, and error messages. 2. Utilize your type system, whatever that may be, to make as many invalid states

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Dillon Mulroy λ

@dillon_mulroy

25 days

type systems

Daniel Feldman

@d_feldman

25 days

Which strongly-typed functional language are you using?

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Dillon Mulroy λ

@dillon_mulroy

3 months

it breaks my heart to think of all the millions of cpus and petabytes of ram fully dedicated to running eslint in ci/cd eslint has cost the world more than null

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Dillon Mulroy λ

@dillon_mulroy

6 months

they even gave him a proper send off

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Dillon Mulroy λ

@dillon_mulroy

2 months

my programming language journey

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Dillon Mulroy λ

@dillon_mulroy

6 months

Vim and Neovim users on OSX, set this in Keyboard settings and thank me later

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Dillon Mulroy λ

@dillon_mulroy

11 months

Woops! Despite doing everything by the books and not using any escape hatches ('as', 'any', or 'non-null assertions') TypeScript let us give a normal 'member' admin permissions! 💥

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Dillon Mulroy λ

@dillon_mulroy

5 months

I was firmly in the merge > rebase camp for over a decade(!) and preached "why add complexity and risk!?" I took an hour one day to really learn about rebase and I've completely flip flopped and actually find merge commits fundamentally more confusing and hard to work with.

Lane || Boot.dev

@wagslane

5 months

Rebase is based. Feat @ThePrimeagen

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Dillon Mulroy λ

@dillon_mulroy

2 months

me learning 🦀 and low level memory management

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Dillon Mulroy λ

@dillon_mulroy

5 years

Did you know Array.from accepts a second argument for mapping over your data? Super useful for making test data sets.

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Dillon Mulroy λ

@dillon_mulroy

5 months

Yup. I'm a fan. 🤩

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Dillon Mulroy λ

@dillon_mulroy

11 months

🌶️ React/TS/JS Hot Take🌶️ One thing that drives me crazy about the React ecosystem, and more specifically "tech influencers" and "thought leaders" in the space, is the infantilization of the developers using and working in it. I’m tired of reading takes like TypeScript

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Dillon Mulroy λ

@dillon_mulroy

2 months

Rust + sqlx is such a nice experience. The query is even type checked at compile time

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Dillon Mulroy λ

@dillon_mulroy

24 days

there are 3 constants in the universe 1. death 2. taxes 3. the f# reply guy showing up anytime i mention OCaml

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Dillon Mulroy λ

@dillon_mulroy

9 months

Finally landed on a tmux, neovim, and ghostty config + setup I'm super happy with

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Dillon Mulroy λ

@dillon_mulroy

10 months

Ya know what’s way more important in being a great software engineer than having strong math skills? Having great catalytic/soft skills. You can be the smartest person on the planet, but if you can’t communicate your ideas, build consensus, and empathize with your stakeholders

maurice

@mauricexxvi

10 months

"you don't need to know math to be good at programming" WRONG! You might be able to program without being good at maths but you certainly would be a better programmer if you were a better mathematician. Fight me!

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Dillon Mulroy λ

@dillon_mulroy

10 months

Lets build the Option<T> type and some helpers for it from scratch in TypeScript! First, lets define our types

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Dillon Mulroy λ

@dillon_mulroy

1 month

Over the years I’ve stopped reading the docs and started reading the source more often than not

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Dillon Mulroy λ

@dillon_mulroy

2 months

kinda where I'm at

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Dillon Mulroy λ

@dillon_mulroy

4 months

My hot take is that JS has the lowest bar of entry to building and being productive (a good thing) but one of the highest bars of any language and stack to building high quality, stable, and reliable software. Very few devs have the expertise to pull off the latter

dax

@thdxr

4 months

JS ecosystem is weirdly a high judgement required stack - tons of garbage to dodge - noise from the amount of VC funding pushing confusion - infinite solutions for every micro problem tempting their way into your codebase you really need to be good at finding clarity

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Dillon Mulroy λ

@dillon_mulroy

4 months

The anatomy of a good error message from the Wix UX/Eng team. So. Good. 🤌

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Dillon Mulroy λ

@dillon_mulroy

2 months

One of my favorite and most used type helpers, UnifyIntersection (also commonly referred to as Prettify)

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Dillon Mulroy λ

@dillon_mulroy

7 months

I can't think of a language where performing a req/resp cycle, including serializations and deserialization, looks this nice and is as simple as this. Gleam is winning my heart

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Dillon Mulroy λ

@dillon_mulroy

2 months

echo -n I will be engaged to @justine_cgrove in 10 hours 😁| shasum -a 256 85416d66705fb334964f111c7921a32dc4c9cd0ea80a3e49521e35835c10fb9c -

Dillon Mulroy λ

@dillon_mulroy

2 months

85416d66705fb334964f111c7921a32dc4c9cd0ea80a3e49521e35835c10fb9c

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Dillon Mulroy λ

@dillon_mulroy

2 months

🥰

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Dillon Mulroy λ

@dillon_mulroy

9 months

took an absolute L on stream

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Dillon Mulroy λ

@dillon_mulroy

2 months

i regret to inform y'all that this is the hard truth. i've become a much more well rounded and experienced dev since starting streaming dev content every morning. There are so many things i'd have never learned or explored without being intentional and working the muscles

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Dillon Mulroy λ

@dillon_mulroy

1 year

That time I was trying to verify a JWT in OCaml and found a bug that I thought was in the JWT library, which then lead to thinking there was a bug in OCaml's main crypto library, which then lead to thinking there was a bug in the underlying C library, which then turned into the

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Dillon Mulroy λ

@dillon_mulroy

4 months

@lucacicada This is the wisest advice given in this entire thread

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Dillon Mulroy λ

@dillon_mulroy

5 months

Okay. I've given @EffectTS_ a real shot and built the app below. It concurrently runs several services for communicating with Twitch and Spotify. I can confidently say Effect is a joy to use and will be a core part of my stack going forward. Take aways below 🧵👇

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Dillon Mulroy λ

@dillon_mulroy

1 month

never deleting this app

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Dillon Mulroy λ

@dillon_mulroy

2 months

really digging using namespaces to organize modules and code in typescript

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Dillon Mulroy λ

@dillon_mulroy

7 months

Introducing ts-error-translator.nvim 🚀 A Neovim port of @mattpocockuk 's VSCode extension, ts-error-translator, that turns messy and confusing TypeScript errors into plain English. Get it here!

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Dillon Mulroy λ

@dillon_mulroy

10 months

Where do y’all normally load these heavy black pans at in your dishwasher? Every angle I try is awkward

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Dillon Mulroy λ

@dillon_mulroy

2 months

@majdav_ you_dont() .then(haveTo) .then(doThat) .then(bigDawg) .catch(gitgud)

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Dillon Mulroy λ

@dillon_mulroy

2 months

the book that cost the Frontend World more than null

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Dillon Mulroy λ

@dillon_mulroy

8 months

Once again I will repeat: The value of tailwind is not inherently the inline utility classes (though, I am a huge fan), it's the underlying design system and API to access that design system in a common sense and predictable way. It makes doing the right thing easy.

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Dillon Mulroy λ

@dillon_mulroy

4 months

npm uninstall prettier eslint typescript-eslint && npm install biome

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Dillon Mulroy λ

@dillon_mulroy

7 months

If this isn't your answer you're ngmi

Cristina 🦉

@cristinazltv

7 months

how would you reverse an array during an interview?

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Dillon Mulroy λ

@dillon_mulroy

8 months

▲

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Dillon Mulroy λ

@dillon_mulroy

1 year

@NoahKahan Chain of sunflower seeds

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Dillon Mulroy λ

@dillon_mulroy

1 year

When @ThePrimeagen 's new hyper-fixation is Go instead of OCaml

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Dillon Mulroy λ

@dillon_mulroy

7 months

My #1 TypeScript wish is being able to statically type that a function throws

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Dillon Mulroy λ

@dillon_mulroy

1 month

sometimes i talk about things i like in front of other people

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Dillon Mulroy λ

@dillon_mulroy

4 months

Am I a Rust dev now? 🦀

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Dillon Mulroy λ

@dillon_mulroy

22 days

didn’t sleep at all on my flight but got to see this

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Dillon Mulroy λ

@dillon_mulroy

1 year

I can't explain it, but we all know it's true

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Dillon Mulroy λ

@dillon_mulroy

2 months

@WarrenInTheBuff why'd you dox me and my code like this, i thought this was going to stay private

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Dillon Mulroy λ

@dillon_mulroy

1 month

My people

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Dillon Mulroy λ

@dillon_mulroy

20 days

just kidding, now the queen has arrived

Dillon Mulroy λ

@dillon_mulroy

21 days

The queen

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Dillon Mulroy λ

@dillon_mulroy

1 month

@fasterthanlime my jaw dropped listening to this yesterday. idk how the presenter(s) could have been more clear (and kind!). just in one ear and out the next for that - he was looking for any reason to be a dick about rust

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Dillon Mulroy λ

@dillon_mulroy

2 months

ghostty just started falling apart on me @mitchellh @badcop_

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Dillon Mulroy λ

@dillon_mulroy

9 months

I never want to work in a language without pattern matching again

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Dillon Mulroy λ

@dillon_mulroy

2 months

🥲 it's happening

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Dillon Mulroy λ

@dillon_mulroy

6 months

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Dillon Mulroy λ

@dillon_mulroy

25 days

The more @EffectTS_ I write, the more I’m sold that it’s the best way to write backend TypeScript. My apps don’t crash, all of the errors that can occur are handled, I have free and seamless OTEL integrations, and I can spin up fibers (green threads) for concurrent work.

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Dillon Mulroy λ

@dillon_mulroy

3 months

👏stop👏throwing👏http👏errors👏outside👏of👏the👏http👏layer👏

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Dillon Mulroy λ

@dillon_mulroy

2 months

OCaml

Not Jerome Powell

@alifarhat79

2 months

Without Googling, name something France invented

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Dillon Mulroy λ

@dillon_mulroy

1 month

Hi, yeah, this is terrible advice. - signed the divorcee of an 8 year relationship that ended due to my ex having an affair

kache

@yacineMTB

1 month

if he makes you sign a prenup he doesn't love you

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Dillon Mulroy λ

@dillon_mulroy

4 months

literally tech twitter

Rothmus 🏴

@Rothmus

4 months

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Dillon Mulroy λ

@dillon_mulroy

6 months

Most JS dev tools written in Rust would be better off written in OCaml

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Dillon Mulroy λ

@dillon_mulroy

2 months

We got a simple pubsub server and worker running with only postgres notify and rust 🦀🚀

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Dillon Mulroy λ

@dillon_mulroy

10 months

Figuring out CJS and ESM in node might be one of the worst experiences across any tech stack

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Dillon Mulroy λ

@dillon_mulroy

9 months

Prophet

@welltypedwitch

9 months

if you want to learn about monads, please read this. seriously! waders paper and "you could have invented monads" are literally the only good monad tutorials I know

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Dillon Mulroy λ

@dillon_mulroy

11 months

Don't take my word for it

Dillon Mulroy λ

@dillon_mulroy

11 months

TypeScript

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Dillon Mulroy λ

@dillon_mulroy

2 months

sue me

Dillon Mulroy λ

@dillon_mulroy

7 months

javascript classes are good, actually

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Dillon Mulroy λ

@dillon_mulroy

4 months

Okay so Svelte is web dev on easy mode. So good. So Simple

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Dillon Mulroy λ

@dillon_mulroy

2 months

continuing my thoughts on programming languages... what features would my ideal language have?

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Dillon Mulroy λ

@dillon_mulroy

6 months

Date night with this smoke show

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Dillon Mulroy λ

@dillon_mulroy

7 months

We have contact ✨🚀 Successfully authenticated and made a request to Twitch's API with @gleamlang It really does feel like the Go of functional programming. I'm a huge fan so far.

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Dillon Mulroy λ

@dillon_mulroy

2 months

we’re about to have Checo off the grid, Danny Ric in a Red Bull, and Lawson in a cash app Venmo PayPal racing bull when we come back from summer break

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Dillon Mulroy λ

@dillon_mulroy

2 months

she said yes btw

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Dillon Mulroy λ

@dillon_mulroy

1 year

@Cloudn0things These two resources will do a much better job at explaining the important concepts than I would: 1. 2.

Railway Oriented Programming

Slides and videos explaining a functional approach to error handling

fsharpforfunandprofit.com

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Dillon Mulroy λ

@dillon_mulroy

10 months

@wagieeacc One step closer to the promise land of OCaml

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Dillon Mulroy λ

@dillon_mulroy

2 months

you can't hide your private/internal types from me

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Dillon Mulroy λ

@dillon_mulroy

6 months

@Madisonkanna

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Dillon Mulroy λ

@dillon_mulroy

9 days

build cool shit with cool people and ignore everything else

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Dillon Mulroy λ

@dillon_mulroy

4 months

The biggest problem with TypeScript/Node backends is that the language makes it far too easy to only ever consider the happy path

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Dillon Mulroy λ

@dillon_mulroy

9 months

Announcing create-melange-app 1.0.0

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Dillon Mulroy λ

@dillon_mulroy

25 days

i've peaked received the best peer review feedback of my life: > Dillon is the tech nerd from every 80s movie, except actually fun to be around

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Dillon Mulroy λ

@dillon_mulroy

3 months

Building api clients with gleam is such a nice experience client api module

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Dillon Mulroy λ

@dillon_mulroy

1 year

A year ago I had little idea of what OCaml was. I had been writing JavaScript and subsequently TypeScript since I was 13 (17 years for those counting). I loved TypeScript, in fact, I still do - I will always choose it over its untyped predecessor. That being said, OCaml (and

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Dillon Mulroy λ

@dillon_mulroy

4 months

@OndrejTucny i dont even have users

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Dillon Mulroy λ

@dillon_mulroy

2 months

i've got a fever and the only prescription is more rust 🦀

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Dillon Mulroy λ

@dillon_mulroy

1 year

I wrote a quick little lualine component for @ThePrimeagen 's Harpoon plugin for @Neovim . It will display the current buffer's mark index if it is "harpooned"

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Dillon Mulroy λ

@dillon_mulroy

1 month

Dmitrii Kovanikov

@ChShersh

1 month

THE LAST MONAD TUTORIAL YOU’LL EVER NEED Imagine a cake. Pretty easy, y’all seen it. (Yes, I’m being intentionally ableist towards people who never saw a cake. Sorry, but you won’t understand monads if you don’t know what a cake is. Stop reading and go eat a cake.) Now,

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Dillon Mulroy λ

@dillon_mulroy

2 months

@daveddev It is exceptionally incorrect to laud the identification and use of design patterns and best practices from the Gang of Four book, as they have led to significant misapplication and overuse, resulting in overly complex and rigid codebases. This "pattern obsession" has encouraged

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Dillon Mulroy λ

@dillon_mulroy

2 months

modes are implemented 😍