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waynevanson/type-class-example.ts

Last active April 17, 2021 23:52
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type-class-example.ts
// defined in fp-ts
export interface Functor<F> {
map: <A,B>(f: (a:A) => B) => (fa: HKT<F,A>) => HKT<F,B>
}
// How it looks in an array
export interface FunctorArray extends Functor<"Array"> {
map: <A,B>(f: (a:A) => B) => (fa: Array<A>) => Array<B>
}
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