Err | /mod.ts | optionals@v2.0.2

Rust-like error handling and options for TypeScript and Deno!

function Err

Re-export

import { Err } from "https://deno.land/x/optionals@v2.0.2/mod.ts";

Err<T, E extends Error>(input: E | string): Result<T, E>

Return a error result.

Examples

Example 1

function divide(left: number, right: number): Result<number, Error> {
  if (right === 0) return Err("Divided by zero");

  return Ok(left / right);
}

E extends Error

input: E | string

a value that extends the Error type.