import { mapLeft } from "https://deno.land/x/fun@v2.0.0-alpha.6/async_either.ts";
Map a function over the Left side of a AsyncEither
Returns
<A>(ta: AsyncEither<B, A>) => AsyncEither<J, A>
import { mapLeft } from "https://deno.land/x/fun@v2.0.0-alpha.6/async_either.ts";
Map a function over the Left side of a AsyncEither