a port of the `Result` type in Rust

Result.js

'use strict';

const Result = function Result() {};
const Err = function Err(value) {
  this.value = value;
};
const Ok = function Ok(value) {
  this.value = value;
}
Result.match = function match(result, matcher, dynamicThis) {
  return (matcher[result.constructor.name] || function () {})
    .call(dynamicThis, (result || {}).value);
};
Result.err = function err(value) {
  return new Err(value);
};
Result.ok = function ok(value) {
  return new Ok(value);
};