gistfile1.txt

import "./styles.css";
import { function as F, option as O, either as E, readonlyArray as A, monoid as Monoid, readonlyNonEmptyArray as NEA } from 'fp-ts';
import { some } from "fp-ts/lib/ReadonlyRecord";

const invert = (x: number): E.Either<string, number> => {
  if (x === 0) {
    return E.left("Cannot divide by 0");
  } else {
    return E.right(1 / x);
  }
}

const addOne = (x: number): number => x + 1;

const result = F.pipe(
  invert(0),
  E.map(addOne),
  E.map(addOne),
  E.map(addOne),
  E.chain(invert),
  E.chain(invert),
  E.chain(invert),
  E.fold(
    (x) => <p>An error occured: ${x}</p>,
    (x) => <p>x</p>
  )
)