EC

Effect Community•3y ago•

1 reply

Deleted User

How to use HashSet has with reference types

Hi,
I can't figure out how I can use the has function for a reference type.
Looks like I've to implement the Hash interface but not sure how to achieve this.
Can someone point me at some example ?
I guess I can hack something using a TaggedClass and using the schema in the constructor but I'd prefer not to.

Example code :

```
import { expect, test } from "vitest"
import * as fc from "fast-check"
import * as HS from "@effect/data/HashSet"
import * as S from "@effect/schema/Schema"

const Person = S.struct({
name: S.string,
age: S.number,
})
type Person = S.To<typeof Person>

test("hashset person", () =>
fc.assert(
fc.property(fc.string(), fc.integer(), (name, age) => {
const p = S.parse(Person)({ name, age })
const pClone = S.parse(Person)({ name, age })
const set = HS.fromIterable<Person>([p])
expect(HS.has(set, pClone)).toBe(true)
})
))