ssalbdivad Comments - Answer Overflow

ssalbdivad

•Created by Tom on 1/20/2025 in #questions

How to ensure optimal discrimination of union types?

Yes ArkType will do this by default. If you want to see what the structure of the discriminated union looks like, you could try something like myModel.internal.assertHasKind("union").discriminantJson

2 replies

Aarktype

•Created by Möhre on 9/12/2024 in #questions

Is there a way to parse Dates and date iso strings without losing toJsonSchema capabilities.

Yeah there is actually an open issue for this: https://github.com/arktypeio/arktype/issues/1110 I think it would be a great addition!

22 replies

Aarktype

•Created by Sebaestschjin on 1/16/2025 in #questions

Recursive types and d.ts files

Another option would be precompiled type output for ArkType, which could potentially help eliminate the need to duplicate types but would be a bit more work to implement

8 replies

Aarktype

•Created by Sebaestschjin on 1/16/2025 in #questions

Recursive types and d.ts files

Unfortunately this is a bug/limitation of TypeScript. TypeScript does not currently have a way to serialize anonymous cyclic types to .d.ts. If you're not able to resolve between your projects (e.g. within a monorepo) directly to .ts, my best recommendation would be: Log/+1 a relevant TS issue- @Andarist not sure if you happen to know off the top of your head if where this is tracked. Add support for explicitly declared scopes: https://github.com/arktypeio/arktype/issues/791

8 replies

Aarktype

•Created by francis on 8/25/2024 in #questions

vscode intellisense errors on the same type definition in some files, but not others

Do these problems apply even to the latest versions of ArkType? Because of similar issues I converted all symbols to string literals which I expected to resolve most stuff like this.

10 replies

Aarktype

•Created by OnkelTem on 1/7/2025 in #questions

TypeScript first - is possible or not? Can't remember :)

Yeah there is, but it is still not a finalized part of the API, so do keep in mind it might still change slightly:

import { declare, type } from "arktype"

type Expected = { a: string; b?: number }
const t = declare<Expected>().type({
    a: "string",
    "b?": "number"
})

import { declare, type } from "arktype"

type Expected = { a: string; b?: number }
const t = declare<Expected>().type({
    a: "string",
    "b?": "number"
})

4 replies

Aarktype

•Created by Tom on 1/7/2025 in #questions

Can arktype drop data not covered by schema?

First of many 📚

8 replies

Aarktype

•Created by Tom on 1/7/2025 in #questions

Can arktype drop data not covered by schema?

You saw in that case there's a global config right?

8 replies

Aarktype

•Created by Jeffrey Konowitch on 1/2/2025 in #questions

`.and` with default, expected behavior?

But I can see how that could be tricky. merge is usually the way to go for combining properties anyways

4 replies

Aarktype

•Created by Jeffrey Konowitch on 1/2/2025 in #questions

`.and` with default, expected behavior?

Hmm yeah I'd say the newer version is accurate because you shouldn't really be able to intersect an optional or defaultable prop with a required prop and get anything other than a required prop

4 replies

Aarktype

•Created by Alan on 12/30/2024 in #questions

Filtering Array<unknown> to a type?

Generally flatMap is a good way to filter and map with a single function in JS:

const transactions = items.flatMap(item => {
    const out = transaction(item)
    return out instanceof type.errors ? [] : [out]
})

const transactions = items.flatMap(item => {
    const out = transaction(item)
    return out instanceof type.errors ? [] : [out]
})

3 replies

Aarktype