Search⌘ K
Home/
Courses/
Using fp-ts for Functional Programming in TypeScript

Solution Review: Using Option in Function

Look at the solution to the coding challenge of using an Option monad in a function.

We'll cover the following...

Solution

We’ll use an Option monad in the following function:

TypeScript 3.3.4
import {none, some} from "fp-ts/Option";
function safeDivide(value: number, divisor: number) {
    if(divisor != 0) {
        return some(value / divisor);
    }
    return none;
}
console.log(safeDivide(10,5));
//console.log(safeDivide(10, 0)); // returns none
//console.log(safeDivide(10, 2)); // returns Some containing 5

Explanation

Here’s a line-by-line explanation of ...