https://github.com/pagequit/unwrap

Yet another Option<T> and Result<T, E>, implemented for TypeScript.
https://github.com/pagequit/unwrap

deno typescript

Last synced: 3 months ago
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Yet another Option<T> and Result<T, E>, implemented for TypeScript.

• Host: GitHub
• URL: https://github.com/pagequit/unwrap
• Owner: pagequit
• License: mit
• Created: 2022-09-12T16:56:49.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2024-03-12T18:50:44.000Z (over 2 years ago)
• Last Synced: 2025-10-20T18:35:11.441Z (8 months ago)
• Topics: deno, typescript
• Language: TypeScript
• Homepage:
• Size: 95.7 KB
• Stars: 4
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# unwrap

Yet another TypeScript `Option` and `Result` implementation.

## Examples

```ts

import { assertEquals } from "https://deno.land/std/testing/asserts.ts";

import { Collection, None, Some } from "https://deno.land/x/unwrap/mod.ts";

type User = { name: string; age: number };

const users = Collection.from([

  ["#123", { name: "Alice", age: 32 }],

  ["#321", { name: "Bob", age: 23 }],

]);

const alice = users.get("#123");

assertEquals(alice, Some({ name: "Alice", age: 32 }));

const charlie = users.get("#000");

assertEquals(charlie, None());

const conditionalMappedValue = users.get("#123").and(users.get("#321")).match({

  Some: (user) => user.name + " is " + user.age.toString(),

  None: () => "never",

});

assertEquals(conditionalMappedValue, "Bob is 23");

```

```ts

import { assertEquals } from "https://deno.land/std/testing/asserts.ts";

import { Result, teaCall } from "https://deno.land/x/unwrap/mod.ts";

type User = { name: string; age: number };

const charlie: Result = teaCall(

  JSON.parse,

  '{ "name": "Charlie", "age": 33 }',

);

assertEquals(charlie.unwrap().name, "Charlie");

```