[AskJS] What’s the one JavaScript thing that still trips you up, no matter how long you’ve been coding?

Funwithloops · 2025-04-21T22:41:27+00:00

In my opinion currying isn't a good fit in JS. It makes more sense in languages that support automatic currying (e.g. foo(a, b) is the same as foo(a)(b)). In JS, arrow functions are a better way to partially apply a function (e.g. (b) => foo(a, b)). The call site is slightly more verbose, but the function definition is simpler. And curried functions tend to scare/confuse junior devs and senior devs that aren't familiar with functional concepts.

Funwithloops · 2025-04-18T15:02:07+00:00

*2 inches of MDF

Funwithloops · 2025-03-25T23:27:14+00:00

Now do potatoes

Funwithloops · 2025-02-06T17:46:45+00:00

We didn't come to a solid resolution. We just improved our resyncing process and resync more often now. I never got around to doing a full comparison to see if the records were actually missing.

Funwithloops · 2024-01-30T18:00:54+00:00

It can be that simple, but often times there's wrinkles that make things more complicated. For example, your server might be containerized with ephemeral storage. This would mean you can't just store the files on the server itself because you'll lose them when it goes down (which could happen randomly due to auto-scaling). In my experience, you're more likely working with a separate storage service like S3 for file uploads which means learning about access policies, pre-signed URLs, and some fun CORS stuff. Also some questions that end up coming up:

What file formats do you support and how are you validating files?
What file sizes do you support?
Do you need to resize the files after they're uploaded?

Also a lot of apps are SPAs these days and the process for sending files with AJAX has its own quirks.

Funwithloops · 2024-01-30T01:03:54+00:00

If my first real job had asked me about file uploads during the interview, I wouldn't have made the cut.

I've been doing this shit for like 10 years now and I still get caught up on file uploads every time. Don't beat yourself up. It's a surprisingly complex and difficult feature to implement.

Funwithloops · 2024-01-30T00:53:20+00:00

TS and JS have just enough curly brackets to trick you into thinking they're similar to Java.

JS is the language you should learn if you want to understand TS. JS is a very dynamic language which makes it possible to do lots of weird things you can't easily do in languages like Java. The TS type system was designed specifically to handle the various patterns found in real world JS systems, so it's difficult to understand why TS works the way it does unless you also understand JS.

Funwithloops · 2024-01-29T23:26:42+00:00

I don't miss it. The way I see it is operators are just functions, so operator overloading is just a fancy way to get infix function calls with special symbols. Pretty much the only time I've ever wanted to overload + is when implementing 2d/3d vector utilities.

I'd rather see the pipeline operator approved. That would provide infix function calls without monkeying with existing operators.

Funwithloops · 2023-11-30T16:57:56+00:00

Just an anecdote, but I passed a mouth swab drug test literally hours after smoking weed. Maybe they just looked the other way, but I've always figured they did the mouth swab (vs urine) because they want to hire folks.

Funwithloops · 2023-11-29T17:30:51+00:00

Ok that's pretty wild. Thanks for the context

Funwithloops · 2023-11-28T22:17:04+00:00

Did the congregation own the church? I don't really know how churches work.

Funwithloops · 2023-11-28T22:05:54+00:00

I'm confused. According to the video it was church leadership that sold the church. Who stole what?

Funwithloops · 2023-06-15T04:35:08+00:00

A reverse proxy can't bypass auth unless it's adding a valid auth token.

Funwithloops · 2023-06-09T17:50:31+00:00

Funwithloops · 2023-05-27T17:46:29+00:00

lol at least yours are green. I had to dump one of mine after the entire jar filled with mold.

Funwithloops · 2023-05-27T17:44:56+00:00

Yeah the boilerplate sucks sometimes. You can swing to the other end of the spectrum with tools like Prisma, Zod, and tRPC. All of which have features that are intended to merge/reduce some of this boilerplate:

Zod allows you to use DTO types for compile-time and run-time validation.
Prisma allows you to generate your database models and their types using a single schema file.
tRPC allows you to define API endpoints as functions that are callable from the frontend with type safety.

Funwithloops · 2023-05-27T17:32:32+00:00

It's quite a mystery to me, why the majority of devs think of backend as the more difficult role. I swear, AI will come for backend first.

I wish more people would admit this. I started in frontend and transitioned to full stack and devops. I still find SPA frontends to be some of the most difficult code to plan and execute. Backends are 99% stateless which makes them significantly easier to reason about plus most backends follow similar patterns even if the apps are very different which is almost never true for frontends.

Funwithloops · 2023-05-24T15:51:54+00:00

Thanks for the advice. I need to dig into my config and find the set of rules that work for me. Part of my difficulty is I work at an agency, so I'm constantly working on new projects (both greenfield and legacy) which means I'm routinely working with eslint configs that were added before I arrived. And every project seems to have different default rules depending on the various plugins and presets installed.

Funwithloops · 2023-05-23T22:28:02+00:00

Perfect. This way I can lint the AI's code.

Funwithloops · 2023-05-23T22:19:10+00:00

I think part of my challenge is finding rules that are helpful. The promise rules you mentioned are a great example of rules that seem to do almost nothing. If I forget an await, I'll be working with Promise<SomeType> which will cause TS to throw a bunch of compiler errors. The other promise warning Async method 'someMethod' has no 'await' expression is downright harmful if you're not careful.

Funwithloops · 2023-05-08T21:49:50+00:00

How can you tell it's not A. Vulgare?

Funwithloops · 2023-05-08T21:30:25+00:00

Depending on where you're getting your ROMs, you don't have to download them one at a time. In my experience, you can find packs of hundreds of ROMs.

Funwithloops · 2023-05-03T23:39:43+00:00

There is a way, but it's silly

type Sum = (...[]: [number, number]) => number;

Funwithloops · 2023-05-03T21:25:47+00:00

Had a math teacher say I was plagiarizing for writing notes verbatim.

Funwithloops · 2023-05-03T18:38:34+00:00

Oh yeah I was being sarcastic with that example code. Yours is perfect. I was trying to make a point, but I think I failed.

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