Assignment: 'either' enforces error handling

Given the function definitions from the lecture for either, Left, Right, id, and safeDiv as shown below, provide a function eShow that takes the result from safeDiv and returns either the error string (in case of division by 0) or otherwise the success message Result is: with the result appended.

Provided is:

const Left   = x => f => g => f (x);
const Right  = x => f => g => g (x);
const either = e => f => g => e (f) (g);
const id = x => x;

const eShow = res => either(res)(id)(res_ => "Result is: " + res_);

Your solution will be tested against:

const x_ = Math.random();
const safeDiv = num => divisor => divisor === 0
    ? Left  ("Cannot divide by 0")
    : Right (num / divisor);
 
eShow(safeDiv(1)(0)) === "Cannot divide by 0" && eShow(safeDiv(x_)(1)) === "Result is: " + x_